Equity - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Dec. 31, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Anti-dilutive potential common shares excluded from reconciliation	4	2
Common stock repurchased (in shares)	2	3
Common stock repurchased	$ 125	$ 210	$ 426
Treasury stock
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)	2		6
Common stock repurchased	$ 125		$ 426
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	$ 949