Debt Long-term Debt (Details) - USD ($) $ in Millions |
12 Months Ended |
Sep. 29, 2019 |
Sep. 30, 2018 |
Sep. 24, 2017 |
Sep. 27, 2015 |
Long-term Debt [Abstract] |
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Long-term debt, Principal amount |
$ 15,500
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$ 15,500
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Long-term debt, principal outstanding |
13,437
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15,365
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Unamortized discount including debt issuance costs, Net |
(75)
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(85)
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Hedge accounting fair value adjustments |
9
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(50)
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Debt, Long-term and Short-term, Combined Amount |
15,434
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15,365
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Long-term debt, included in short-term debt |
1,997
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0
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Long-term Debt, Excluding Current Maturities |
13,437
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15,365
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Future principal payments, Fiscal 2020 |
2,000
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Future principal payments, Fiscal 2022 |
2,000
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Future principal payments, Fiscal 2023 |
2,000
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Future principal payments, Fiscal 2024 |
1,500
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Future principal payments, after Fiscal 2024 |
8,000
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Long-term Debt, Fair value |
16,500
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15,100
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Derivative, Notional Amount |
2,804
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3,807
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Interest paid related to commercial paper and long-term debt, net of cash received from the related interest rate swamps |
563
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662
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$ 313
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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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Long-term debt, principal outstanding |
8,500
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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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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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Long-term debt, principal outstanding |
7,000
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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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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 |
$ 250
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$ 250
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Long-term debt, Effective Interest Rate |
2.74%
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2.93%
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Long-term debt, Maturity date |
May 20, 2020
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May 20, 2020
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Long-term debt, Basis Spread on Variable Rate |
0.55%
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0.55%
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Long-term debt, Interest Rate Terms |
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 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 |
$ 1,750
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$ 1,750
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Long-term debt, Effective Interest Rate |
2.64%
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3.13%
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Long-term debt, Maturity date |
May 20, 2020
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May 20, 2020
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Debt Instrument, Interest Rate, Stated Percentage |
2.25%
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2.25%
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Percentage of Debt Hedged by Interest Rate Derivatives |
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 |
$ 2,000
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$ 2,000
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Long-term debt, Effective Interest Rate |
2.89%
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3.73%
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Long-term debt, Maturity date |
May 20, 2022
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May 20, 2022
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Debt Instrument, Interest Rate, Stated Percentage |
3.00%
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3.00%
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Percentage of Debt Hedged by Interest Rate Derivatives |
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 |
$ 2,000
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$ 2,000
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Long-term debt, Effective Interest Rate |
3.46%
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3.46%
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Long-term debt, Maturity date |
May 20, 2025
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May 20, 2025
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Debt Instrument, Interest Rate, Stated Percentage |
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 |
$ 1,000
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$ 1,000
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Long-term debt, Effective Interest Rate |
4.73%
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4.73%
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Long-term debt, Maturity date |
May 20, 2035
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May 20, 2035
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Debt Instrument, Interest Rate, Stated Percentage |
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 |
$ 1,500
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$ 1,500
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Long-term debt, Effective Interest Rate |
4.72%
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4.72%
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Long-term debt, Maturity date |
May 20, 2045
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May 20, 2045
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Debt Instrument, Interest Rate, Stated Percentage |
4.80%
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4.80%
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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 |
$ 500
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$ 500
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Long-term debt, Effective Interest Rate |
3.06%
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3.14%
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Long-term debt, Maturity date |
Jan. 30, 2023
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Jan. 30, 2023
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Long-term debt, Basis Spread on Variable Rate |
0.73%
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0.73%
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Long-term debt, Interest Rate Terms |
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 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 |
$ 1,500
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$ 1,500
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Long-term debt, Effective Interest Rate |
2.70%
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2.70%
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Long-term debt, Maturity date |
Jan. 30, 2023
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Jan. 30, 2023
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Debt Instrument, Interest Rate, Stated Percentage |
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 |
$ 1,500
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$ 1,500
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Long-term debt, Effective Interest Rate |
3.01%
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3.01%
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Long-term debt, Maturity date |
May 20, 2024
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May 20, 2024
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Debt Instrument, Interest Rate, Stated Percentage |
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 |
$ 2,000
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$ 2,000
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Long-term debt, Effective Interest Rate |
3.45%
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3.46%
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Long-term debt, Maturity date |
May 20, 2027
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May 20, 2027
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Debt Instrument, Interest Rate, Stated Percentage |
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 |
$ 1,500
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$ 1,500
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Long-term debt, Effective Interest Rate |
4.47%
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4.47%
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Long-term debt, Maturity date |
May 20, 2047
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May 20, 2047
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Debt Instrument, Interest Rate, Stated Percentage |
4.30%
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4.30%
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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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Derivative, Notional Amount |
$ 1,800
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$ 1,800
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