Stockholders' Equity - Scheduled Vesting for Outstanding Restricted Stock Units (Details) - Restricted Stock Units - shares shares in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Scheduled vesting — restricted stock units
2024 (in shares)	218.3
2025 (in shares)	124.6
2026 (in shares)	48.7
2027 (in shares)	11.2
2028 (in shares)	1.3
Thereafter (in shares)	1.7
Total (in shares)	405.8	384.4	279.9	303.3