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Estimates (Accrued And Other Current Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Other Information [Abstract]    
Interest payable $ 561 $ 600
Customer advances and deposits 188 161
Accrued capital expenditures 461 604
Accrued wages and benefits 297 109
Taxes payable other than income taxes 384 446
Exchanges payable 155 127
Deferred Revenue 158 112
Other 867 616
Accrued and other current liabilities $ 3,071 $ 2,775