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Estimates (Schedule of Other Non-Current Assets, net) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]    
Crude pipeline linefill and tank bottoms $ 498 $ 517
Regulatory assets 42 41
Pension assets 140 103
Deferred charges 177 188
Restricted funds 164 179
Other 624 629
Total other non-current assets, net $ 1,645 $ 1,657