Debt Long-term Debt (Details) - USD ($)
$ in Millions |
1 Months Ended |
3 Months Ended |
12 Months Ended |
Aug. 31, 2018 |
Jul. 31, 2018 |
Jun. 24, 2018 |
Sep. 30, 2018 |
Sep. 24, 2017 |
Sep. 25, 2016 |
Sep. 27, 2015 |
| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 15,500
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$ 21,000
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| Unamortized discount including debt issuance costs, Net |
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(85)
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(106)
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| Hedge accounting fair value adjustments |
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(50)
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0
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| Long-term Debt, Fair value |
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15,100
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21,500
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| Gross notional amount of Derivatives |
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3,807
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5,496
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| Interest paid related to commercial paper and long-term debt, net of cash received from the related interest rate swamps |
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662
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313
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$ 282
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| Long-term debt, included in short-term debt |
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0
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1,496
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| Long-term debt, included in long-term debt |
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15,365
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19,398
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| Debt, Long-term and Short-term, Combined Amount |
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$ 15,365
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20,894
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| Special mandatory redemption description, aggregate principal amount and redemption price |
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Our floating-rate notes due 2019, floating-rate notes due 2020, fixed-rate 1.85% notes due 2019 and fixed-rate 2.10% notes due 2020 (collectively, the Old SMR Notes) issued in May 2017 for an aggregate principal amount of $4.0 billion were subject to special mandatory redemption provisions that required redemption on the first to occur of (i) the termination of the NXP purchase agreement or (ii) June 1, 2018 if the NXP transaction had not closed as of such date.
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| Future principal payments, Fiscal 2020 |
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$ 2,000
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| Future principal payments, Fiscal 2022 |
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2,000
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| Future principal payments, Fiscal 2023 |
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2,000
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| Future principal payments, after Fiscal 2023 |
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9,500
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| May 2017 Debt Issuance [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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11,000
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| Proceeds from long-term debt net of underwriting discounts and offering expenses |
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10,950
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| May 2015 debt issuance [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 10,000
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| Proceeds from long-term debt net of underwriting discounts and offering expenses |
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$ 9,900
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| Floating-rate three-month LIBOR plus 0.27% notes due May 18, 2018 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 250
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| Long-term debt, Effective Interest Rate |
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1.65%
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| Long-term debt, Maturity date |
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May 18, 2018
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May 18, 2018
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| Long-term debt, Basis Spread on Variable Rate |
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0.27%
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0.27%
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| Long-term debt, Interest Rate Terms |
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Variable per annum rate equal to three-month LIBOR as determined on the interest determination date plus 0.27%.
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| Floating-rate three-month LIBOR plus 0.55% notes due May 20, 2020 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 250
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$ 250
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| Long-term debt, Effective Interest Rate |
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2.93%
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1.92%
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| Long-term debt, Maturity date |
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May 20, 2020
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May 20, 2020
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| Long-term debt, Basis Spread on Variable Rate |
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0.55%
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0.55%
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| Long-term debt, Interest Rate Terms |
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Variable per annum rate equal to three-month LIBOR as determined on the interest determination date plus 0.55%.
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| Fixed-rate 1.40% notes due May 18, 2018 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 1,250
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| Long-term debt, Effective Interest Rate |
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1.93%
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| Long-term debt, Maturity date |
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May 18, 2018
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May 18, 2018
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| Debt Instrument, Interest Rate, Stated Percentage |
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1.40%
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1.40%
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| Fixed-rate 2.25% notes due May 20, 2020 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,750
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$ 1,750
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| Long-term debt, Effective Interest Rate |
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3.13%
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2.20%
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| Long-term debt, Maturity date |
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May 20, 2020
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May 20, 2020
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| Debt Instrument, Interest Rate, Stated Percentage |
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2.25%
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2.25%
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| Percentage of Debt Hedged by Interest Rate Derivatives |
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43.00%
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43.00%
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| Fixed-rate 3.00% notes due May 20, 2022 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 2,000
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$ 2,000
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| Long-term debt, Effective Interest Rate |
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3.73%
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2.65%
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| Long-term debt, Maturity date |
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May 20, 2022
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May 20, 2022
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| Debt Instrument, Interest Rate, Stated Percentage |
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3.00%
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3.00%
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| Percentage of Debt Hedged by Interest Rate Derivatives |
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50.00%
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50.00%
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| Fixed-rate 3.45% notes due May 20, 2025 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 2,000
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$ 2,000
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| Long-term debt, Effective Interest Rate |
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3.46%
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3.46%
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| Long-term debt, Maturity date |
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May 20, 2025
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May 20, 2025
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| Debt Instrument, Interest Rate, Stated Percentage |
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3.45%
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3.45%
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| Fixed-rate 4.65% notes due May 20, 2035 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,000
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$ 1,000
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| Long-term debt, Effective Interest Rate |
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4.73%
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4.74%
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| Long-term debt, Maturity date |
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May 20, 2035
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May 20, 2035
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| Debt Instrument, Interest Rate, Stated Percentage |
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4.65%
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4.65%
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| Fixed-rate 4.80% notes due May 20, 2045 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,500
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$ 1,500
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| Long-term debt, Effective Interest Rate |
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4.72%
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4.71%
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| Long-term debt, Maturity date |
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May 20, 2045
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May 20, 2045
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| Debt Instrument, Interest Rate, Stated Percentage |
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4.80%
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4.80%
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| Floating-rate three-month LIBOR plus 0.36% notes due May 20, 2019 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 750
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| Long-term debt, Effective Interest Rate |
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1.80%
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| Long-term debt, Maturity date |
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May 20, 2019
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May 20, 2019
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| Long-term debt, Basis Spread on Variable Rate |
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0.36%
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0.36%
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| Long-term debt, Interest Rate Terms |
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Variable per annum rate equal to three-month LIBOR as determined on the interest determination date plus 0.36%.
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| Floating-rate three-month LIBOR plus 0.45% notes due May 20, 2020 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 500
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| Long-term debt, Effective Interest Rate |
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1.86%
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| Long-term debt, Maturity date |
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May 20, 2020
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May 20, 2020
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| Long-term debt, Basis Spread on Variable Rate |
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0.45%
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0.45%
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| Long-term debt, Interest Rate Terms |
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Variable per annum rate equal to three-month LIBOR as determined on the interest determination date plus 0.45%.
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| Floating-rate three-month LIBOR plus 0.73% notes due January 30, 2023 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 500
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$ 500
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| Long-term debt, Effective Interest Rate |
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3.14%
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2.11%
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| Long-term debt, Maturity date |
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Jan. 30, 2023
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Jan. 30, 2023
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| Long-term debt, Basis Spread on Variable Rate |
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0.73%
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0.73%
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| Long-term debt, Interest Rate Terms |
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Variable per annum rate equal to three-month LIBOR as determined on the interest determination date plus 0.73%.
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| Fixed-rate 1.85% notes due May 20, 2019 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 1,250
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| Long-term debt, Effective Interest Rate |
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2.00%
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| Long-term debt, Maturity date |
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May 20, 2019
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May 20, 2019
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| Debt Instrument, Interest Rate, Stated Percentage |
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1.85%
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1.85%
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| Fixed-rate 2.10% notes due May 20, 2020 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 0
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$ 1,500
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| Long-term debt, Effective Interest Rate |
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2.19%
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| Long-term debt, Maturity date |
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May 20, 2020
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May 20, 2020
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| Debt Instrument, Interest Rate, Stated Percentage |
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2.10%
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2.10%
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| Fixed-rate 2.60% notes due January 30, 2023 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,500
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$ 1,500
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| Long-term debt, Effective Interest Rate |
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2.70%
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2.70%
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| Long-term debt, Maturity date |
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Jan. 30, 2023
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Jan. 30, 2023
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| Debt Instrument, Interest Rate, Stated Percentage |
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2.60%
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2.60%
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| Fixed-rate 2.90% notes due May 20, 2024 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,500
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$ 1,500
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| Long-term debt, Effective Interest Rate |
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3.01%
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3.01%
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| Long-term debt, Maturity date |
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May 20, 2024
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May 20, 2024
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| Debt Instrument, Interest Rate, Stated Percentage |
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2.90%
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2.90%
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| Fixed-rate 3.25% notes due May 20, 2027 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 2,000
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$ 2,000
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| Long-term debt, Effective Interest Rate |
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3.46%
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3.46%
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| Long-term debt, Maturity date |
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May 20, 2027
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May 20, 2027
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| Debt Instrument, Interest Rate, Stated Percentage |
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3.25%
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3.25%
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| Fixed-rate 4.30% notes due May 20, 2047 [Member] |
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| Long-term Debt [Abstract] |
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| Long-term debt, Principal amount |
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$ 1,500
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$ 1,500
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| Long-term debt, Effective Interest Rate |
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4.47%
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4.47%
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| Long-term debt, Maturity date |
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May 20, 2047
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May 20, 2047
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| Debt Instrument, Interest Rate, Stated Percentage |
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4.30%
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4.30%
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| May 2018 Debt Exchange [Member] |
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| Long-term Debt [Abstract] |
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| Amount of Old Notes exchanged for new notes |
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$ 122
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| Amount of notes repurchased |
$ 122
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$ 3,800
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$ 71
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| Interest Rate Swaps Related to Long-term Debt [Member] |
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| Long-term Debt [Abstract] |
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| Gross notional amount of Derivatives |
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$ 1,800
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$ 3,000
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