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Fair Value Measurements - Carrying Value And Fair Value of Outstanding Debt Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 23,911	$ 25,510
Fixed rate debt | Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	26,084	25,334
Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	16,302	9,481
Variable rate debt | Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	16,302	9,478
Level 1 | Fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	23,827	25,426
Level 1 | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	0	1,078
Level 2 | Fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	84	84
Level 2 | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	16,302	8,403
Level 3 | Fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	0	0
Level 3 | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 0	$ 0

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