Debt (Long-term Debt Instruments) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument
Finance leases	$ 291,000,000	$ 263,000,000
Total debt	12,922,000,000	13,406,000,000
Less short-term portion	(1,420,000,000)	(1,178,000,000)
Total long-term debt	11,502,000,000	12,228,000,000
Accounts receivable securitization facility expiring 2025 | Line of Credit
Debt Instrument
Long-term debt	1,323,000,000	1,085,000,000
Borrowing capacity, net of letters of credit	$ 80,000,000
Interest rate at March 31, 2025	5.30%
Average month-end debt outstanding	$ 1,275,000,000
Weighted-average interest rate on average debt outstanding	5.30%
Maximum month-end debt outstanding	$ 1,323,000,000
Collateral amount	1,403,000,000
$4.25 billion ABL facility expiring 2027 | Line of Credit
Debt Instrument
Maximum borrowing capacity	4,250,000,000
Long-term debt	1,504,000,000	2,253,000,000
Borrowing capacity, net of letters of credit	2,723,000,000
Letters of credit	$ 18,000,000
Interest rate at March 31, 2025	5.50%
Average month-end debt outstanding	$ 1,658,000,000
Weighted-average interest rate on average debt outstanding	5.50%
Maximum month-end debt outstanding	$ 1,876,000,000
Term loan facility expiring 2031
Debt Instrument
Long-term debt	$ 982,000,000	984,000,000
Annual repayment rate	1.00%
5 1/2 percent Senior Notes due 2027 | Senior notes
Debt Instrument
Stated interest rate	5.50%
Long-term debt	$ 499,000,000	499,000,000
3 7/8 percent Senior Secured Notes due 2027 | Senior notes
Debt Instrument
Stated interest rate	3.875%
Long-term debt	$ 747,000,000	747,000,000
4 7/8 percent Senior Notes due 2028 | Senior notes
Debt Instrument
Stated interest rate	4.875%
Long-term debt	$ 1,667,000,000	1,667,000,000
6 percent Senior Secured Notes due 2029 | Senior notes
Debt Instrument
Stated interest rate	6.00%
Long-term debt	$ 1,490,000,000	1,490,000,000
5 1/4 percent Senior Notes due 2030 | Senior notes
Debt Instrument
Stated interest rate	5.25%
Long-term debt	$ 746,000,000	746,000,000
4 percent Senior Notes due 2030 | Senior notes
Debt Instrument
Stated interest rate	4.00%
Long-term debt	$ 745,000,000	745,000,000
3 7/8 percent Senior Notes due 2031 | Senior notes
Debt Instrument
Stated interest rate	3.875%
Long-term debt	$ 1,093,000,000	1,092,000,000
3 3/4 percent Senior Notes due 2032 | Senior notes
Debt Instrument
Stated interest rate	3.75%
Long-term debt	$ 745,000,000	745,000,000
6 1/8 percent Senior Notes due 2034 | Senior notes
Debt Instrument
Stated interest rate	6.125%
Long-term debt	$ 1,090,000,000	$ 1,090,000,000
Term loan facility | Line of Credit
Debt Instrument
Borrowing capacity, net of letters of credit	$ 0
Interest rate at March 31, 2025	6.10%
Average month-end debt outstanding	$ 992,000,000
Weighted-average interest rate on average debt outstanding	6.10%
Maximum month-end debt outstanding	$ 993,000,000
4 7/8 percent Senior Notes due 2028, one | Senior notes
Debt Instrument
Long-term debt	1,663,000,000
4 7/8 percent Senior Notes due 2028, two | Senior notes
Debt Instrument
Long-term debt	$ 4,000,000