Gross Fair Value of Derivative Positions (Details) - USD ($) $ in Millions	Jun. 27, 2020	Sep. 28, 2019
Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	$ 354	$ 368
Derivative Asset, Counterparty Netting Offset	(204)	(231)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(73)	(55)
Net derivative positions	77	82
Current Assets \| Derivatives designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	298	302
Current Assets \| Derivatives designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Current Assets \| Derivatives designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1	1
Current Assets \| Derivatives not designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	48	65
Current Assets \| Derivatives not designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Current Assets \| Derivatives not designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	7
Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	939	493
Derivative Asset, Counterparty Netting Offset	(491)	(345)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(158)	(6)
Net derivative positions	290	142
Other Assets \| Derivatives designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	220	241
Other Assets \| Derivatives designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	532	89
Other Assets \| Derivatives designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Other Assets \| Derivatives not designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	187	163
Other Assets \| Derivatives not designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Other Assets \| Derivatives not designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(256)	(259)
Derivative Liability, Counterparty netting offset	256	258
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Net derivative positions	0	(1)
Other Current Liabilities \| Derivatives designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(76)	(67)
Other Current Liabilities \| Derivatives designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(6)	(82)
Other Current Liabilities \| Derivatives designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(16)	(3)
Other Current Liabilities \| Derivatives not designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(158)	(107)
Other Current Liabilities \| Derivatives not designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
Other Current Liabilities \| Derivatives not designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0
Other Long-Term Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(479)	(382)
Derivative Liability, Counterparty netting offset	439	318
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	11	7
Net derivative positions	(29)	(57)
Other Long-Term Liabilities \| Derivatives designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(322)	(244)
Other Long-Term Liabilities \| Derivatives designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
Other Long-Term Liabilities \| Derivatives designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(5)	(1)
Other Long-Term Liabilities \| Derivatives not designated as hedges \| Foreign exchange
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(151)	(126)
Other Long-Term Liabilities \| Derivatives not designated as hedges \| Interest rate
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(1)	$ (11)
Other Long-Term Liabilities \| Derivatives not designated as hedges \| Other Derivative
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ 0

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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