Goodwil And Intangibles (Schedule Of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Successor [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,441
Accumulated Amortization	(214)
Net Carrying Amount	4,227
Successor [Member] | Customer Relationships - Business [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	800
Accumulated Amortization	(48)
Net Carrying Amount	752
Successor [Member] | Customer Relationships - Wholesale [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	3,491
Accumulated Amortization	(146)
Net Carrying Amount	3,345
Successor [Member] | Trademarks and Tradenames [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	150
Accumulated Amortization	(20)
Net Carrying Amount	$ 130
Predecessor [Member]
Intangible Assets [Line Items]
Gross Carrying Amount		$ 4,526
Accumulated Amortization		(3,849)
Net Carrying Amount		677
Predecessor [Member] | Customer Base [Member]
Intangible Assets [Line Items]
Gross Carrying Amount		4,332
Accumulated Amortization		(3,781)
Net Carrying Amount		551
Predecessor [Member] | Trade Name [Member]
Intangible Assets [Line Items]
Gross Carrying Amount		122
Net Carrying Amount		122
Predecessor [Member] | Royalty Agreement [Member]
Intangible Assets [Line Items]
Gross Carrying Amount		72
Accumulated Amortization		(68)
Net Carrying Amount		$ 4