Share-Based Payments - Schedule of Share-based Compensation, Stock Options, Activity (Detail) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Shares (Thousands)
Outstanding, beginning of period, shares | shares	75,402
Granted, shares | shares	779
Exercised, shares | shares	(31,036)
Forfeited, shares | shares	(89)
Expired, shares | shares	(181)
Outstanding, end of period, shares | shares	44,874
Vested and expected to vest, end of period, shares | shares	44,747	[1]
Exercisable, end of period, shares | shares	41,583
Weighted-Average Exercise Price Per Share
Outstanding, beginning of period, weighted-average exercise price per share (in dollars per share) | $ / shares	$ 28.31
Granted, weighted-average exercise price per share (in dollars per share) | $ / shares	33.82
Exercised, weighted-average exercise price per share (in dollars per share) | $ / shares	25.75
Forfeited, weighted-average exercise price per share (in dollars per share) | $ / shares	34.39
Expired, weighted-average exercise price per share (in dollars per share) | $ / shares	20.27
Outstanding, end of period, weighted-average exercise price per share (in dollars per share) | $ / shares	30.20
Vested and expected to vest, end of period, weighted-average exercise price per share (in dollars per share) | $ / shares	30.19	[1]
Exercisable, end of period, weighted-average exercise price per share (in dollars per share) | $ / shares	$ 29.81
Outstanding, end of period, weighted-average remaining contractual term	2 years 8 months 12 days
Vested and expected to vest, end of period, weighted-average remaining contractual term	2 years 8 months 12 days	[1]
Exercisable, end of period, weighted-average remaining contractual term	2 years 3 months 18 days
Outstanding, end of period, aggregate intrinsic value | $	$ 1,295	[2]
Vested and expected to vest, end of period, aggregate intrinsic value | $	1,291	[1],[2]
Exercisable, end of period, aggregate intrinsic value | $	$ 1,216	[2]

[1] The number of options expected to vest takes into account an estimate of expected forfeitures.

[2] Market price of our underlying common stock less exercise price.