Accounts Receivable (Accounts Receivable) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Apr. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Successor [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for doubtful accounts	$ (57)
Accounts receivable, net	458
Successor [Member] | Retail And Wholesale [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	441
Successor [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 74
Predecessor [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for doubtful accounts			$ (130)	$ (120)	$ (105)
Accounts receivable, net			553
Predecessor [Member] | Retail And Wholesale [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable			608
Predecessor [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable			$ 75