Earnings Per Share - Narrative (Details) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015	Apr. 30, 2015
Earnings Per Share [Abstract]
Share repurchase program					$ 2,000,000,000
Shares repurchased	$ 266,000,000	$ 157,000,000	$ 515,000,000	$ 284,000,000
Shares repurchased during the period (in shares)	10	4	20	8