Common Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2019
Equity, Class of Treasury Stock [Line Items]
Value of repurchased shares	$ 1,200,000,000
Shares issued in period (in shares)	3,800,000	4,100,000
Common stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount			$ 2,500,000,000
Common stock repurchased (in shares)	7,900,000
Value of repurchased shares		$ 0
Stock repurchase program, remaining authorized repurchase amount	$ 1,300,000,000