Earnings Per Share (EPS) - Computation of Basic and Diluted EPS Attributable to Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 77	$ 77	$ 307	$ 269
Weighted average shares of common stock outstanding (in shares)	62	66	63	66
Basic EPS (in dollars per share)	$ 1.23	$ 1.17	$ 4.85	$ 4.08
Net income	$ 77	$ 77	$ 307	$ 269
Dilutive effect of stock options and restricted stock units (in shares)	1	1	1	1
Weighted average shares of common stock outstanding - diluted (in shares)	63	67	64	67
Diluted EPS (in dollars per share)	$ 1.22	$ 1.16	$ 4.81	$ 4.03
Common stock equivalents excluded from income per diluted share because of their anti-dilutive effect (in shares)	1	0	1	1