Gross Fair Value of Derivative Positions (Details) - USD ($) $ in Millions	Jun. 27, 2015	Sep. 27, 2014
Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	$ 580	$ 422
Derivative Asset, Counterparty Netting Offset	(224)	(144)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(209)	(80)
Net derivative positions	147	198
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	421	251
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
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	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	158	171
Current Assets | Derivatives not designated as hedges | Other
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0
Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	589	316
Derivative Asset, Counterparty Netting Offset	(49)	(18)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(251)	(119)
Net derivative positions	289	179
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	304	160
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	95	117
Other Assets | Derivatives Designated as Hedges | Other
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1
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	189	39
Other Assets | Derivatives not designated as hedges | Other
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0
Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(270)	(188)
Derivative Liability, Counterparty netting offset	249	154
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Net derivative positions	(21)	(34)
Other Accrued 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	(70)	(54)
Other Accrued 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	(44)	(75)
Other Accrued Liabilities | Derivatives Designated as Hedges | Other
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(12)
Other Accrued 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	(144)	(59)
Other Accrued Liabilities | Derivatives not designated as hedges | Other
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	(85)	(8)
Derivative Liability, Counterparty netting offset	24	8
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Net derivative positions	(61)	0
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	(26)	(8)
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
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(2)
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	(7)	$ 0
Other Long-Term Liabilities | Derivatives not designated as hedges | Other
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (50)