Outstanding and Weighted Average Common Shares - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Feb. 29, 2016	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Number of series A mandatory convertible preferred stock issued (in shares)	575
Dividend rate of series A mandatory convertible preferred stock	8.00%
Par value of series A mandatory convertible preferred stock (in dollars per share)	$ 1
Liquidation preference of series A mandatory convertible preferred stock (in dollars per share)	$ 1,000
Conversion of preferred stock (in shares)		0	0	11,600
Additional amount of common stock that may be repurchased		$ 650
Cash dividends on common stock (in dollars per share)		$ 1.00	$ 1.00	$ 1.00