Earnings Per Share - Share Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Stock repurchased (in shares)	90	38	144
Cost of Shares	$ 2,886	$ 867	$ 3,373
Average Price Paid per Share (in dollars per share)	$ 31.91	$ 22.90	$ 23.51