Stock-Based Compensation - Schedule of Stock Option Plans Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at beginning of year, Shares	3,828	4,106	3,591
Granted, Shares	489	265	698
Exercised, Shares	(425)	(543)	(183)
Outstanding at end of year, Shares	3,892	3,828	4,106
Stock options exercisable at end of year, Shares	3,276	2,112	1,809
Outstanding at beginning of year, Weighted - Average Exercise Price	$ 49.71	$ 47.96	$ 45.32
Granted, Weighted - Average Exercise Price	48.00	65.80	59.07
Exercised, Weighted - Average Exercise Price	37.97	44.33	38.56
Outstanding at end of period, Weighted - Average Exercise Price	50.78	49.71	47.96
Stock options exercisable at end of year, Weighted - Average Exercise Price	$ 49.79	$ 45.41	$ 43.39