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Pension and Other Postretirement Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 9	$ 32
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 31
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Settlements, Plan Assets		$ 265

Amount of plan assets that relate to an irrevocable action that relieves the employer, or plan, of primary responsibility for a benefit obligation and eliminates risks related to the obligation and the assets used to effect settlement. Includes, but is not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified pension benefits and purchasing annuity contracts to cover vested benefits.

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