Number of shares that have been repurchased and retired during the period.

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Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Earnings Per Share - Share Repurchases (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Jul. 01, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Shares Repurchased (in shares)		22	2	40	29
Cost of Shares		$ 701	$ 39	$ 1,252	$ 616
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Shares Repurchased (in shares)	3