Composition of Certain Financial Statement Items Other Income, Costs and Expenses (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 30, 2017 |
Jun. 30, 2019 |
Dec. 24, 2017 |
Sep. 27, 2020 |
Sep. 29, 2019 |
Sep. 30, 2018 |
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| Gain (Loss) Related to Litigation Settlement | $ 28 | $ 31 | |||||||||||
| NXP termination fee | $ 2,000 | ||||||||||||
| Restructuring-related charges | [1] | 151 | 334 | [2] | |||||||||
| Restructuring Charges | [3] | 62 | 353 | [2] | |||||||||
| Restructuring and restructuring related charges | 213 | 687 | [2] | ||||||||||
| Net gain from both sale of assets and business | 52 | ||||||||||||
| Liabilities, Fair Value Adjustment | 41 | ||||||||||||
| Cumulative to date | |||||||||||||
| Restructuring-related charges | [1] | 485 | |||||||||||
| Restructuring Charges | [3] | 415 | |||||||||||
| Restructuring and restructuring related charges | 900 | ||||||||||||
| Other Expense [Member] | |||||||||||||
| Restructuring and restructuring related charges | 629 | ||||||||||||
| Investment and other income, net [Member] | |||||||||||||
| Restructuring and restructuring related charges | 58 | ||||||||||||
| Icera Complaint to EC [Member] | |||||||||||||
| Loss (gain) contingency, loss (gain) in period | $ 275 | ||||||||||||
| KFTC [Member] | |||||||||||||
| Loss (gain) contingency, loss (gain) in period | $ 927 | ||||||||||||
| KFTC [Member] | Other Expense [Member] | |||||||||||||
| Loss (gain) contingency, loss (gain) in period | $ (43) | ||||||||||||
| EC [Member] | |||||||||||||
| Loss (gain) contingency, loss (gain) in period | $ 1,200 | ||||||||||||
| TFTC [Member] | |||||||||||||
| Loss (gain) contingency, loss (gain) in period | $ (676) | ||||||||||||
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