Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 533	$ 538	$ 218
Weighted Average Shares
Weighted average common shares outstanding (in shares)	52,792,931	56,094,542	56,584,238
Effect of dilutive securities
Stock-based awards (in shares)	726,155	411,271	654,740
Weighted average diluted common shares (in shares)	53,519,086	56,505,813	57,238,978
Earnings per common share
Basic earnings per common share (in usd per share)	$ 10.10	$ 9.59	$ 3.85
Effect of dilutive securities
Stock-based awards (in usd per share)	(0.14)	(0.07)	(0.05)
Diluted earnings per common share (in usd per share)	$ 9.96	$ 9.52	$ 3.80