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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Decrease (increase) in current assets:    
Receivables, net $ (2,653) $ (2,946)
Inventories (940) 175
Prepaid expenses and other (77) (24)
Increase (decrease) in current liabilities:    
Accounts payable 2,744 2,992
Accrued expenses (120) 105
Taxes other than income taxes payable 36 (144)
Income taxes payable 288 26
Changes in current assets and current liabilities (722) 184
Cash Flows Related to Interest and Income Taxes    
Interest paid in excess of amount capitalized, including interest on finance leases 93 103
Income taxes paid, net 204 36
Operating cash flows    
Operating Leases 97 100
Finance Leases 20 18
Financing cash flows    
Finance Leases 41 31
Changes in lease balances resulting from new and modified leases, Operating Leases 79 72
Changes in lease balances resulting from new and modified leases, Finance Leases $ 100 $ 7