NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Reorganization Items, net (Details) - USD ($) $ in Millions		2 Months Ended	10 Months Ended	12 Months Ended
	Oct. 31, 2020	Dec. 31, 2020	Oct. 31, 2020	Dec. 31, 2021	Dec. 31, 2019
NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER
Gain on settlement of liabilities subject to compromise		$ 0	$ 4,022	$ 0
Unamortized deferred gain and issuance costs, net		0	125	0
Junior debtor-in-possession exit fee		0	(12)	0
Acceleration of unrecognized compensation expense on cancelled stock-based compensation awards		0	(5)	0
Write-off of prepaid directors and officers' insurance premiums		0	(2)	0
Total non-cash reorganization items		0	4,128	0	$ 0
Legal, professional and other, net	$ (15)	(3)	(43)	(6)
Debtor-in-possession financing costs		0	(25)	0
Total reorganization items, net		$ (3)	$ 4,060	$ (6)	$ 0