Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units shares in Millions	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Number of Units
Beginning balance (in shares) | shares	279.9
Units granted (in shares) | shares	224.1
Units vested (in shares) | shares	(69.1)
Units forfeited (in shares) | shares	(35.6)
Ending balance (in shares) | shares	399.3
Weighted-Average Grant-Date Fair Value
Beginning balance (in usd per share) | $ / shares	$ 134
Units granted (in usd per share) | $ / shares	150
Units vested (in usd per share) | $ / shares	109
Units forfeited (in usd per share) | $ / shares	143
Ending balance (in usd per share) | $ / shares	$ 147