Debt (Schedule of long-term debt instruments) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	May 31, 2023	Dec. 31, 2022	Nov. 30, 2022
Debt Instrument
Finance leases	$ 188,000,000		$ 123,000,000
Total debt	12,028,000,000		11,370,000,000
Less short-term portion	(1,448,000,000)		(161,000,000)
Total long-term debt	10,580,000,000		11,209,000,000
Accounts Receivable Securitization Facility expiring 2024 | Line of Credit
Debt Instrument
Long-term debt	1,283,000,000		959,000,000
Borrowing capacity, net of letters of credit	$ 16,000,000
Interest rate at September 30, 2023	6.30%
Average month-end debt outstanding	$ 1,129,000,000
Weighted-average interest rate on average debt outstanding	6.00%
Maximum month-end debt outstanding	$ 1,288,000,000
Collateral amount	$ 1,550,000,000
Debt instrument, face amount		$ 1,100,000,000
Long Term Debt, Extension Term	364 days
Term loan facility expiring 2025
Debt Instrument
Long-term debt	$ 947,000,000		953,000,000
Annual repayment rate	1.00%
Term loan facility | Line of Credit
Debt Instrument
Borrowing capacity, net of letters of credit	$ 0
Interest rate at September 30, 2023	7.10%
Average month-end debt outstanding	$ 954,000,000
Weighted-average interest rate on average debt outstanding	6.80%
Maximum month-end debt outstanding	$ 958,000,000
Repurchase facility | Line of Credit
Debt Instrument
Interest rate at September 30, 2023	6.50%
Average month-end debt outstanding	$ 56,000,000
Weighted-average interest rate on average debt outstanding	5.90%
Maximum month-end debt outstanding	$ 100,000,000
Accounts Receivable Securitization Facility, Amended | Line of Credit
Debt Instrument
Debt instrument, face amount	1,300,000,000
Line of Credit | $4.25 billion ABL Facility expiring 2027
Debt Instrument
Maximum borrowing capacity	4,250,000,000
Long-term debt	1,792,000,000		1,523,000,000
Borrowing capacity, net of letters of credit	2,385,000,000
Letters of credit	$ 65,000,000
Interest rate at September 30, 2023	6.50%
Average month-end debt outstanding	$ 1,761,000,000
Weighted-average interest rate on average debt outstanding	6.10%
Maximum month-end debt outstanding	$ 1,848,000,000
Senior notes | 5 1/2 percent Senior Notes due 2027
Debt Instrument
Stated interest rate	5.50%
Long-term debt	$ 498,000,000		498,000,000
Senior notes | 3 7/8 percent Senior Secured Notes due 2027
Debt Instrument
Stated interest rate	3.875%
Long-term debt	$ 745,000,000		744,000,000
Senior notes | 4 7/8 percent Senior Notes due 2028
Debt Instrument
Stated interest rate	4.875%
Long-term debt	$ 1,664,000,000		1,663,000,000
Senior notes | 6 percent Senior Secured Notes due 2029
Debt Instrument
Stated interest rate	6.00%			6.00%
Long-term debt	$ 1,487,000,000		1,486,000,000
Debt instrument, face amount				$ 1,500,000,000
Senior notes | 5 1/4 percent Senior Notes due 2030
Debt Instrument
Stated interest rate	5.25%
Long-term debt	$ 745,000,000		744,000,000
Senior notes | 4 percent Senior Notes due 2030
Debt Instrument
Stated interest rate	4.00%
Long-term debt	$ 744,000,000		743,000,000
Senior notes | 3 7/8 percent Senior Notes due 2031
Debt Instrument
Stated interest rate	3.875%
Long-term debt	$ 1,091,000,000		1,090,000,000
Senior notes | 3 3/4 percent Senior Notes due 2032
Debt Instrument
Stated interest rate	3.75%
Long-term debt	$ 744,000,000		744,000,000
Senior notes | 4 7/8 percent Senior Notes due 2028, one
Debt Instrument
Long-term debt	1,660,000,000
Senior notes | 4 7/8 percent Senior Notes due 2028, two
Debt Instrument
Long-term debt	4,000,000
Repurchase facility | Repurchase facility expiring 2023
Debt Instrument
Long-term debt	$ 100,000,000		$ 100,000,000