Accounting Pronouncements (Details) - USD ($) $ in Millions	Mar. 25, 2016	Dec. 25, 2015	Sep. 25, 2015
Current assets:
Deferred income taxes			$ 345
Noncurrent assets:
Deferred income taxes	$ 2,458		2,144
Current liabilities:
Accrued and other current liabilities	1,719		1,749
Noncurrent liabilities:
Deferred income taxes	$ 291		$ 329
Impact of Adoption
Current assets:
Deferred income taxes		$ (345)
Noncurrent assets:
Deferred income taxes		313
Current liabilities:
Accrued and other current liabilities		(33)
Noncurrent liabilities:
Deferred income taxes		$ 1