Other Financial Data - Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016	Aug. 03, 2016
Equity, Class of Treasury Stock [Line Items]
Payments for repurchased shares			$ 358,000,000	$ 728,000,000
Number of shares repurchased (in shares)			4.3
Repurchase of common shares, average cost (in US$ per share)			$ 83.22
Share repurchase authority utilized during period			$ 12,200,000,000
Amount available for future share repurchase	$ 1,800,000,000		1,800,000,000
Cash dividends paid	$ 76,000,000	$ 70,000,000	$ 230,000,000	$ 213,000,000
Maximum
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 14,000,000,000