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Long-term Debt and Finance Leases - Schedule of Long-term Debt and Finance Leases (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Debt Instrument [Line Items]
Finance leases	$ 14	$ 14
Subtotal long-term debt and finance leases (including current maturities)	11,035	10,906
Less current maturities	(1,132)	(996)
Less debt issuance costs	(79)	(86)
Discounts	(12)	(12)
Total long-term debt and finance leases	9,812	9,812
Recourse Debt
Debt Instrument [Line Items]
Subtotal recourse debt	11,021	10,892
Recourse Debt | Senior Notes, due 2028
Debt Instrument [Line Items]
Subtotal recourse debt	$ 821	821
Interest rate %	5.75%
Recourse Debt | Senior Notes, due 2029
Debt Instrument [Line Items]
Subtotal recourse debt	$ 733	733
Interest rate %	5.25%
Recourse Debt | Senior Notes, due 2029
Debt Instrument [Line Items]
Subtotal recourse debt	$ 500	500
Interest rate %	3.375%
Recourse Debt | Senior Notes, due 2029
Debt Instrument [Line Items]
Subtotal recourse debt	$ 798	798
Interest rate %	5.75%
Recourse Debt | Senior Notes, due 2031
Debt Instrument [Line Items]
Subtotal recourse debt	$ 1,030	1,030
Interest rate %	3.625%
Recourse Debt | Senior Notes, due 2032
Debt Instrument [Line Items]
Subtotal recourse debt	$ 480	480
Interest rate %	3.875%
Recourse Debt | Senior Notes, due 2033
Debt Instrument [Line Items]
Subtotal recourse debt	$ 925	925
Interest rate %	6.00%
Recourse Debt | Senior Notes, due 2034
Debt Instrument [Line Items]
Subtotal recourse debt	$ 950	950
Interest rate %	6.25%
Recourse Debt | Convertible Senior Notes, due 2048
Debt Instrument [Line Items]
Subtotal recourse debt	$ 232	232	$ 232
Interest rate %	2.75%
Recourse Debt | Senior Secured First Lien Notes, due 2025
Debt Instrument [Line Items]
Subtotal recourse debt	$ 500	500
Interest rate %	2.00%
Recourse Debt | Senior Secured First Lien Notes, due 2027
Debt Instrument [Line Items]
Subtotal recourse debt	$ 900	900
Interest rate %	2.45%
Recourse Debt | Senior Secured First Lien Notes, due 2029
Debt Instrument [Line Items]
Subtotal recourse debt	$ 500	500
Interest rate %	4.45%
Recourse Debt | Senior Secured First Lien Notes, due 2033
Debt Instrument [Line Items]
Subtotal recourse debt	$ 740	740
Interest rate %	7.00%
Recourse Debt | Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Subtotal recourse debt	$ 135	0
Basis spread on variable rate	1.72%
Recourse Debt | Term Loan B, due 2031 | Revolving Credit Facility
Debt Instrument [Line Items]
Subtotal recourse debt	$ 1,311	1,317
Basis spread on variable rate	1.75%
Recourse Debt | Tax-exempt bonds
Debt Instrument [Line Items]
Subtotal recourse debt	$ 466	$ 466
Recourse Debt | Tax-exempt bonds | Minimum
Debt Instrument [Line Items]
Interest rate %	1.25%
Recourse Debt | Tax-exempt bonds | Maximum
Debt Instrument [Line Items]
Interest rate %	4.75%

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