Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended
Aug. 31, 2021	May 31, 2021
Successor [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Prior service credit	$ 2	$ 55

Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration