Fair Value - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	$ 2,728	$ 2,726
Total assets and liabilities measured at fair value	35,000	29,600
Total assets and liabilities measured at fair value priced using non-binding broker quotes	$ 185	$ 14
Total assets and liabilities measured at fair value priced using non-binding broker quotes (percentage)	0.50%	0.00%
Unsecured debt | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	$ 2,700	$ 2,700
Estimated fair value of senior notes	$ 2,400	$ 2,500