Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Successor [Member]
Net income (loss)		$ 414
Other comprehensive income (loss), net of tax		60
Comprehensive income (loss)		$ 474
Predecessor [Member]
Net income (loss)	$ 4,541		$ (402)	$ (5,911)
Other comprehensive income (loss), net of tax	359		(105)	(108)
Comprehensive income (loss)	$ 4,900		$ (507)	$ (6,019)