Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of Units
Beginning balance (in shares)	279.9	303.3	286.7
Units granted (in shares)	262.8	127.3	158.6
Units vested (in shares)	(113.3)	(108.4)	(115.5)
Units forfeited (in shares)	(45.0)	(42.3)	(26.5)
Ending balance (in shares)	384.4	279.9	303.3
Weighted Average Grant-Date Fair Value
Beginning Balance (in dollars per share)	$ 134	$ 100	$ 73
Units granted (in dollars per share)	142	167	119
Units vested (in dollars per share)	114	85	62
Units forfeited (in dollars per share)	143	116	82
Ending Balance (in dollars per share)	$ 144	$ 134	$ 100