Earnings Per Share - Schedule of Computation of Basic and Diluted EPS under Two-class Method (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net Income (Loss)	$ 53	$ 79	$ 127	$ 162
Denominator:
Basic: Weighted average common stock	85.6	87.2	85.9	87.2
Add: Weighted average stock options/share awards	0.1	0.1	0.2	0.2
Diluted weighted average common stock:	85.8	87.3	86.0	87.4
Net earnings per share - basic	$ 0.61	$ 0.91	$ 1.48	$ 1.86
Net earnings per share - diluted	$ 0.61	$ 0.91	$ 1.47	$ 1.85