Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Apr. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Apr. 30, 2021	Jun. 30, 2020
Successor [Member]
Net income (loss)		$ 99
Other comprehensive income (loss), net of tax		41
Comprehensive income (loss)		$ 140
Predecessor [Member]
Net income (loss)	$ 4,481		$ (181)	$ 4,541	$ (367)
Other comprehensive income (loss), net of tax	348		(423)	359	(337)
Comprehensive income (loss)	$ 4,829		$ (604)	$ 4,900	$ (704)