Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions		1 Months Ended
		Nov. 30, 2025	Feb. 28, 2025	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Obligations under finance leases due at various dates through 2054				$ 125	$ 129
Long-Term Debt and Lease Obligation, Including Current Maturities				12,599	12,614
Unamortized debt issuance costs	[1]			(101)	(106)
Long-Term Debt and Lease Obligation, Current				(1,685)	(1,114)
Long-term debt, net of unamortized deferred financing costs				10,813	11,394
Senior unsecured notes due 2026, interest rate of 1.400%
Debt Instrument [Line Items]
Senior unsecured debt				$ 400	400
Debt Instrument, Interest Rate, Stated Percentage				1.40%
Senior unsecured notes due 2026, interest rate of 5.277%(1)
Debt Instrument [Line Items]
Senior unsecured debt				$ 515	526
Debt Instrument, Interest Rate, Stated Percentage				5.277%
Senior unsecured notes due 2027, interest rate of 2.125%
Debt Instrument [Line Items]
Senior unsecured debt				$ 574	587
Debt Instrument, Interest Rate, Stated Percentage				2.125%
Senior unsecured notes due 2027, interest rate of 7.165%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 554	554
Debt Instrument, Interest Rate, Stated Percentage				7.165%
Senior unsecured notes due 2028, interest rate of 0.625%
Debt Instrument [Line Items]
Senior unsecured debt				$ 575	587
Debt Instrument, Interest Rate, Stated Percentage				0.625%
Senior unsecured notes due 2028, interest rate of 6.850%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 746	746
Debt Instrument, Interest Rate, Stated Percentage				6.85%
Senior unsecured notes due 2029, interest rate of 6.337%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 576	588
Debt Instrument, Interest Rate, Stated Percentage				6.337%
Senior unsecured notes due 2029, interest rate of 7.330%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 750	750
Debt Instrument, Interest Rate, Stated Percentage				7.33%
Senior unsecured notes due 2030, interest rate of 6.500%
Debt Instrument [Line Items]
Senior unsecured debt				$ 700	700
Debt Instrument, Interest Rate, Stated Percentage				6.50%
Senior unsecured notes due 2030, interest rate of 7.050%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 999	999
Debt Instrument, Interest Rate, Stated Percentage				7.05%
Senior unsecured notes due 2031, interest rate of 7.000%
Debt Instrument [Line Items]
Senior unsecured debt				$ 600	600
Debt Instrument, Interest Rate, Stated Percentage				7.00%
Senior unsecured notes due 2031, interest rate of 5.000%
Debt Instrument [Line Items]
Senior unsecured debt				$ 862	881
Debt Instrument, Interest Rate, Stated Percentage				5.00%
Senior unsecured notes due 2032, interest rate of 7.379%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage				7.379%
Senior unsecured notes due 2033, interest rate of 7.200%(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]			$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage				7.20%
Senior unsecured notes due 2033, interest rate of 6.750%
Debt Instrument [Line Items]
Senior unsecured debt				$ 1,100	1,100
Debt Instrument, Interest Rate, Stated Percentage				6.75%
Senior unsecured notes due 2034, interest rate of 7.375%
Debt Instrument [Line Items]
Senior unsecured debt				$ 800	800
Debt Instrument, Interest Rate, Stated Percentage				7.375%
Pollution control and industrial revenue bonds due at various dates through 2030(2)
Debt Instrument [Line Items]
Other long-term debt	[3]			$ 85	85
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.30%
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Minimum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.10%
Bank loans due at various dates through 2031(3)
Debt Instrument [Line Items]
Other long-term debt	[4]			$ 638	$ 582
Long-term debt, weighted average interest rate, at point in time				2.40%	2.40%
Various senior notes | Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)		0.50%	0.25%

[1] Related to the Company's long-term debt, excluding obligations under finance leases.

[2] In February 2025, Moody's Ratings downgraded the Company's credit rating, which had the effect of increasing interest rates by 25 basis points on certain senior unsecured notes, effective on various dates beginning May 15, 2025 through January 19, 2026. In November 2025, S&P Global Ratings and Moody's Ratings downgraded the Company's credit rating, which together had the effect of increasing interest rates for certain senior unsecured notes by an additional 50 basis points, effective on various dates beginning January 15, 2026 through May 15, 2026.

[3] Interest rates range from 4.1% to 4.3%.

[4] The weighted average interest rate was 2.4% and 2.4% as of March 31, 2026 and December 31, 2025, respectively.