Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023	Aug. 31, 2023
Debt Instrument [Line Items]
Obligations under finance leases due at various dates through 2054		$ 140	$ 148
Long-Term Debt and Lease Obligation, Including Current Maturities		13,435	13,400
Unamortized debt issuance costs	[1]	(69)	(74)
Long-Term Debt and Lease Obligation, Current		(2,348)	(1,025)
Long-term debt, net of unamortized deferred financing costs		11,018	12,301
Senior unsecured notes due 2024, interest rate of 3.500%
Debt Instrument [Line Items]
Senior unsecured debt		$ 473	473
Debt Instrument, Interest Rate, Stated Percentage		3.50%
Senior unsecured notes due 2024, interest rate of 5.900%
Debt Instrument [Line Items]
Senior unsecured debt		$ 527	527
Debt Instrument, Interest Rate, Stated Percentage		5.90%
Senior unsecured notes due 2025, interest rate of 1.250%
Debt Instrument [Line Items]
Senior unsecured debt		$ 324	331
Debt Instrument, Interest Rate, Stated Percentage		1.25%
Senior unsecured notes due 2025, interest rate of 6.050%
Debt Instrument [Line Items]
Senior unsecured debt		$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage		6.05%
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 4.777%
Debt Instrument [Line Items]
Senior unsecured debt		$ 1,081	1,105
Debt Instrument, Interest Rate, Stated Percentage		4.777%
Senior unsecured notes due 2027, interest rate of 2.125%
Debt Instrument [Line Items]
Senior unsecured debt		$ 539	551
Debt Instrument, Interest Rate, Stated Percentage		2.125%
Senior unsecured notes due 2027, interest rate of 6.165%
Debt Instrument [Line Items]
Senior unsecured debt		$ 2,000	2,000
Debt Instrument, Interest Rate, Stated Percentage		6.165%
Senior unsecured term loan due 2027(1)
Debt Instrument [Line Items]
Senior unsecured debt	[2]	$ 880	$ 880
Debt Instrument, Interest Rate, Stated Percentage		6.922%	6.943%
Senior unsecured notes due 2028, interest rate of 0.625%
Debt Instrument [Line Items]
Senior unsecured debt		$ 540	$ 552
Debt Instrument, Interest Rate, Stated Percentage		0.625%
Senior unsecured notes due 2028, interest rate of 6.350%
Debt Instrument [Line Items]
Senior unsecured debt		$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage		6.35%		6.35%
Senior unsecured notes due 2029, interest rate of 5.337%
Debt Instrument [Line Items]
Senior unsecured debt		$ 540	552
Debt Instrument, Interest Rate, Stated Percentage		5.337%
Senior unsecured notes due 2029, interest rate of 6.330%
Debt Instrument [Line Items]
Senior unsecured debt		$ 750	750
Debt Instrument, Interest Rate, Stated Percentage		6.33%
Senior unsecured notes due 2030, interest rate of 6.550%
Debt Instrument [Line Items]
Senior unsecured debt		$ 999	999
Debt Instrument, Interest Rate, Stated Percentage		6.55%		6.55%
Senior unsecured notes due 2032, interest rate of 6.379%
Debt Instrument [Line Items]
Senior unsecured debt		$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage		6.379%
Senior unsecured notes due 2033, interest rate of 6.700%
Debt Instrument [Line Items]
Senior unsecured debt		$ 1,000	1,000
Debt Instrument, Interest Rate, Stated Percentage		6.70%		6.70%
Pollution control and industrial revenue bonds due at various dates through 2030(2)
Debt Instrument [Line Items]
Other long-term debt	[3]	$ 126	127
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Minimum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.05%
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Bank loan due 2026, interest rate of 2.8%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.80%
Other long-term debt		$ 111	0
Bank loans due at various dates through 2030(3)
Debt Instrument [Line Items]
Other long-term debt	[4]	$ 5	$ 5
Long-term debt, weighted average interest rate, at point in time		2.70%	2.60%

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

[2] The interest rate was 6.922% and 6.943% as of March 31, 2024 and December 31, 2023, respectively.

[3] Interest rates range from 4.05% to 5.00%.

[4] The weighted average interest rate was 2.7% and 2.6% as of March 31, 2024 and December 31, 2023, respectively.