Equity - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Anti-dilutive potential common shares excluded from reconciliation	5	3	5	2
Common stock repurchased (in shares)			6	5
Common stock repurchased			$ 435	$ 386	$ 426
Payments for Repurchase of Common Stock			$ 390	$ 386
Treasury stock
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)			6		6
Common stock repurchased			$ 435		$ 426
Accrued Liabilities	$ 45		45
December 2015 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						$ 1,500
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 639		$ 639