Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Finance lease obligations due through 2044	$ 250
Other notes	298	$ 414
Total debt	54,098	53,864
2.20% - 2.50% due through 2026
Debt Instrument [Line Items]
Unsecured debt	5,899	6,159
2.60% - 3.20% due through 2030
Debt Instrument [Line Items]
Unsecured debt	5,088	5,389
3.25% - 3.90% due through 2059
Debt Instrument [Line Items]
Unsecured debt	10,136	9,637
3.95% - 5.15% due through 2059
Debt Instrument [Line Items]
Unsecured debt	8,166	7,462
5.71% - 6.63% due through 2060
Debt Instrument [Line Items]
Unsecured debt	18,996	18,987
6.86% - 8.75% due through 2064
Debt Instrument [Line Items]
Unsecured debt	5,265	5,577
Finance lease obligations due through 2044
Debt Instrument [Line Items]
Finance lease obligations due through 2044	$ 250	$ 239
Minimum \| 2.20% - 2.50% due through 2026
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.20%
Minimum \| 2.60% - 3.20% due through 2030
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.60%
Minimum \| 3.25% - 3.90% due through 2059
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.25%
Minimum \| 3.95% - 5.15% due through 2059
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.95%
Minimum \| 5.71% - 6.63% due through 2060
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.71%
Minimum \| 6.86% - 8.75% due through 2064
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	6.86%
Maximum \| 2.20% - 2.50% due through 2026
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.50%
Maximum \| 2.60% - 3.20% due through 2030
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.20%
Maximum \| 3.25% - 3.90% due through 2059
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.90%
Maximum \| 3.95% - 5.15% due through 2059
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.15%
Maximum \| 5.71% - 6.63% due through 2060
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	6.63%
Maximum \| 6.86% - 8.75% due through 2064
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	8.75%

Amount of short-term and long-term debt and lease obligation.

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