Stock-Based Compensation - Changes in Restricted Stock Units (Details) - RSUs	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Restricted Stock Units Outstanding
Balance at beginning of period (in shares) | shares	492,320,000
Granted (in shares) | shares	123,709,000
Vested (in shares) | shares	(101,057,000)
Forfeited (in shares) | shares	(3,372,000)
Balance at end of period (in shares) | shares	511,600,000
Weighted Average Grant Date Fair Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 36.06
Granted (in dollars per share) | $ / shares	44.43
Vested (in dollars per share) | $ / shares	33.61
Forfeited (in dollars per share) | $ / shares	39.70
Balance at end of period (in dollars per share) | $ / shares	$ 38.56