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Organization and Basis of Presentation (Non-Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Investments in equity method investees | $ 180 | $ 165
Notes receivable | 400 | 331
Variable interest entity, non-consolidated |  |
Variable Interest Entity [Line Items] |  |
Investments in equity method investees | 125 | 137
Notes receivable | 15 | 15
Future funding commitments | $ 1 | $ 2

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