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Estimates (Schedule Of Non-Cash Investing And Financing Activities) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
NON-CASH INVESTING ACTIVITIES: [Abstract]      
Accrued capital expenditures $ 464 $ 604 $ 1,334
Units issued in connection with the Enable Acquisition(1) [1] 3,509 0 0
Lease assets obtained in exchange for new lease liabilities 18 42 68
Acquisition of interest in unconsolidated affiliate 49 0 0
SUPPLEMENTAL CASH FLOW INFORMATION; [Abstract]      
Cash paid for interest, net of interest capitalized 2,188 2,092 1,932
Cash paid for income taxes (net of refunds) $ 41 $ (64) $ 31
[1] See Note 3 for additional information.