Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income applicable to common shareholders	$ 53	$ 149
Weighted Average Shares
Weighted average common shares outstanding (in shares)	53,219,866	52,675,562
Effect of dilutive securities
Stock-based awards (in shares)	358,135	622,241
Weighted average diluted common shares (in shares)	53,578,001	53,297,803
Earnings per common share
Basic earnings per common share (in dollars per share)	$ 0.99	$ 2.83
Effect of dilutive securities
Stock-based awards (in dollars per share)	0	(0.03)
Diluted earnings per common share (in dollars per share)	$ 0.99	$ 2.80