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Revenue Recognition (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended
Apr. 30, 2021
Jun. 30, 2021
Jun. 30, 2022
Apr. 30, 2021
Jun. 30, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Revenue, Remaining Performance Obligation, Amount     $ 1,447   $ 1,447
Successor [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Lease revenue   $ 11 $ 16   $ 32
Predecessor [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Lease revenue $ 5     $ 26