Stockholders' Equity - Scheduled Vesting for Outstanding Restricted Stock Units (Details) - Restricted Stock Units - shares shares in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Scheduled vesting — restricted stock units
2025 (in shares)	146.0
2026 (in shares)	88.5
2027 (in shares)	34.3
2028 (in shares)	11.5
2029 (in shares)	1.4
Thereafter (in shares)	1.4
Total (in shares)	283.1	405.8	384.4	279.9