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Goodwil And Intangibles (Narrative) (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangibles impairment			$ 0	$ 0	$ 0
Customer Relationships - Business [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			11 years
Customer Relationships - Business [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			16 years
Successor [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment
Estimated future amortization expense, 2022		321	$ 321
Estimated future amortization expense, 2023		321	321
Estimated future amortization expense, 2024		321	321
Estimated future amortization expense, 2025		321	321
Estimated future amortization expense, 2026		$ 301	$ 301
Successor [Member] \| Customer Relationships - Wholesale [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			16 years
Successor [Member] \| Customer Relationships - Business [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			11 years
Successor [Member] \| Trademarks and Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			5 years
Predecessor [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated goodwill impairment charges				9,154	9,154
Goodwill associated with planned disposal					658
Goodwill impairment					$ 5,725
Predecessor [Member] \| Customer Base [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life				8 years
Predecessor [Member] \| Customer Base [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life				12 years