Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2021
Accounts Receivable [Abstract]
Accounts Receivable	Successor Predecessor ($ in millions) December 31, 2021 December 31, 2020      Retail and Wholesale $  441  $ 608  Other 74  75  Less: Allowance for doubtful accounts (57) (130) Accounts receivable, net $458 $ 553
Activity In The Allowance For Credit Losses	Successor Predecessor For the eight For the four For the year For the year months ended months ended ended ended ($ in millions) December 31, April 30, December 31, December 31, 2021 2021 2020 2019 Balance at beginning of the Period: $  - $ 130  $ 120  $ 105  Increases: Provision for bad debt charged to expense 14  - - - Increases: Provision for bad debt charged to revenue 38  37  106  109  Write-offs charged against allowance, net of recoveries 5  (167) (96) (83) Reclassified to Assets Held for Sale and Other - - - (11) Balance at end of Period: $ 57  $ - $ 130  $ 120