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Equity - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 30, 2017
Equity, Class of Treasury Stock [Line Items]
Anti-dilutive potential common shares excluded from reconciliation	15	9	14	6
Common stock repurchased		$ 50	$ 220	$ 50
December 2017 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 1,500
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 960		$ 960
Common stock repurchased (in shares)			4	1
Common stock repurchased			$ 220	$ 50