Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions									12 Months Ended
	Feb. 17, 2022	Oct. 28, 2021	Oct. 20, 2021	Feb. 20, 2020	Oct. 08, 2019	Aug. 01, 2019	May 13, 2019	Feb. 20, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)		$ 0.40	$ 0.40	$ 0.76	$ 0.69	$ 0.69	$ 0.69	$ 0.69	$ 0.40	$ 0.76	$ 2.76
2019 Repurchase Program
Subsequent Event [Line Items]
Remaining dollar value of shares that may be repurchased									$ 66
Subsequent Event
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)	$ 0.46
Subsequent Event | 2022 Repurchase Program
Subsequent Event [Line Items]
Authorized amount	$ 250