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Segment Information - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) segment | Sep. 30, 2024 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  |  | 7 |
Operating income | $ 1,112 | $ 1,052 |  | $ 3,131 | $ 3,233
Unallocated |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | $ (26) | $ (25) |  | $ (94) | 58
Change in Accounting Method Accounted for as Change in Estimate | Unallocated |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income |  |  | $ 117 |  | $ 117

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