Debt (Long-term Debt Instruments) (Details) - USD ($)	1 Months Ended	9 Months Ended
	Jun. 30, 2025	Sep. 30, 2025	Jul. 31, 2025	Dec. 31, 2024
Debt Instrument
Finance leases		$ 318,000,000		$ 263,000,000
Total debt		14,148,000,000		13,406,000,000
Less short-term portion		(1,548,000,000)		(1,178,000,000)
Total long-term debt		12,600,000,000		12,228,000,000
Accounts receivable securitization facility expiring 2026 | Line of Credit
Debt Instrument
Long-term debt		1,439,000,000		1,085,000,000
Borrowing capacity, net of letters of credit		$ 60,000,000
Interest rate at September 30, 2025		5.10%
Average month-end principal amount of debt outstanding		$ 1,334,000,000
Weighted-average interest rate on average debt outstanding		5.20%
Maximum month-end principal amount of debt outstanding		$ 1,440,000,000
Debt instrument, extension period	364 days
Collateral amount		1,710,000,000
$4.50 billion ABL facility expiring 2030 | Line of Credit
Debt Instrument
Maximum borrowing capacity		4,500,000,000	$ 4,500,000,000
Long-term debt		2,586,000,000		2,253,000,000
Borrowing capacity, net of letters of credit		1,880,000,000
Letters of credit		$ 22,000,000
Interest rate at September 30, 2025		5.10%
Average month-end principal amount of debt outstanding		$ 1,918,000,000
Weighted-average interest rate on average debt outstanding		5.40%
Maximum month-end principal amount of debt outstanding		$ 2,598,000,000
Term loan facility expiring 2031
Debt Instrument
Long-term debt		$ 978,000,000		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		$ 1,668,000,000		1,667,000,000
6 percent Senior Secured Notes due 2029 | Senior notes
Debt Instrument
Stated interest rate		6.00%
Long-term debt		$ 1,491,000,000		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		$ 746,000,000		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		$ 746,000,000		745,000,000
6 1/8 percent Senior Notes due 2034 | Senior notes
Debt Instrument
Stated interest rate		6.125%
Long-term debt		$ 1,091,000,000		$ 1,090,000,000
Term loan facility | Line of Credit
Debt Instrument
Borrowing capacity, net of letters of credit		$ 0
Interest rate at September 30, 2025		5.70%
Average month-end principal amount of debt outstanding		$ 989,000,000
Weighted-average interest rate on average debt outstanding		6.00%
Maximum month-end principal amount of debt outstanding		$ 993,000,000
4 7/8 percent Senior Notes due 2028, one | Senior notes
Debt Instrument
Long-term debt		1,664,000,000
4 7/8 percent Senior Notes due 2028, two | Senior notes
Debt Instrument
Long-term debt		$ 4,000,000