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Fair Value - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Fair Value Disclosures [Abstract]    
Total assets and liabilities measured at fair value $ 30,600 $ 29,600
Total assets and liabilities measured at fair value priced using non-binding broker quotes $ 15 $ 14
Total assets and liabilities measured at fair value priced using non-binding broker quotes (percentage) 0.00% 0.00%
Senior notes $ 2,727 $ 2,726
Estimated fair value of senior notes $ 2,500 $ 2,500