Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions		Apr. 01, 2017	Oct. 01, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		$ 48	$ 8
Derivative, Collateral, Obligation to Return Cash		0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Current		3	4
Available for Sale Securities, Noncurrent		95	93
Deferred Compensation Assets		266	254
Derivative Asset, Netting	[1]	(11)	(61)
Total Assets		411	400
Derivative Liability, Netting	[1]	(59)	(69)
Total Liabilities		11	0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		2	45
Derivative Asset, Netting		(2)	(27)
Derivative Financial Instruments, Liabilities		0	0
Derivative Liability, Netting		(21)	(1)
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		45	4
Derivative Asset, Netting		(9)	(34)
Derivative Financial Instruments, Liabilities		11	0
Derivative Liability, Netting		(38)	(68)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Current		0	0
Available for Sale Securities, Noncurrent		0	0
Deferred Compensation Assets		8	18
Total Assets		8	18
Total Liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		0	0
Derivative Financial Instruments, Liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		0	0
Derivative Financial Instruments, Liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Current		2	2
Available for Sale Securities, Noncurrent		40	38
Deferred Compensation Assets		258	236
Total Assets		358	386
Total Liabilities		70	69
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		4	72
Derivative Financial Instruments, Liabilities		21	1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		54	38
Derivative Financial Instruments, Liabilities		49	68
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Current		1	2
Available for Sale Securities, Noncurrent		55	55
Deferred Compensation Assets		0	0
Total Assets		56	57
Total Liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		0	0
Derivative Financial Instruments, Liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Assets		0	0
Derivative Financial Instruments, Liabilities		$ 0	$ 0

[1] (a)Our derivative assets and liabilities are presented in our Consolidated Condensed Balance Sheets on a net basis when a legally enforceable master netting arrangement exists between the counterparty to a derivative contract and us. At April 1, 2017, and October 1, 2016, we had $48 million and $8 million, respectively, of cash collateral posted with various counterparties where master netting arrangements exist and held no cash collateral.