Capital Stock - Schedule of Change in Treasury Shares (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Beginning balance	10,005,795	1,808,133
Rabbi trust shares distributed and/or sold	(3,149)	(2,338)
Shares repurchased	0	8,200,000
Ending balance	10,002,646	10,005,795