Fresh Start Accounting (Fresh Start - Net Cash Payments) (Details) $ in Millions	May 01, 2021 USD ($)
Fresh Start Accounting [Abstract]
Net proceeds from Incremental Exit Term Loan Facility	$ 220
Release of restricted cash from other assets to cash	8
Total sources	228
Payments of Excess to Unsecured senior notes holders	(1,313)
Payments of pre-petition accounts payable and contract cure payments	(62)
Payments of professional fees and other bankruptcy related costs	(22)
Total uses	(1,397)
Net uses of cash	$ (1,169)