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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Investments in unconsolidated subsidiaries, fair value | $ 405 |  | $ 378
Asset impairments | 0 | $ 0 |
Total long-term debt | 3,913 |  | 3,320
Fair Value Measured at Net Asset Value | Recurring |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Investments at fair value using NAV | 21 |  | 21
2.500% senior notes | Carrying Value | Mortgages |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Total long-term debt | 208 |  | 196
Non-Marketable Equity Investments |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Capital investments | $ 148 |  | $ 148

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