Consolidated Statements Of Cash Flows - USD ($) $ in Millions	2 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2021	Apr. 30, 2021	Jun. 30, 2022
Adjustments to reconcile net income to net cash provided from (used by) operating activities:
Bad debt expense			$ 14
Cash flows provided from (used by) investing activities:
Capital expenditures			(1,088)
Successor [Member]
Cash flows provided from (used by) operating activities:
Net Income	$ 99		166
Adjustments to reconcile net income to net cash provided from (used by) operating activities:
Depreciation and amortization	179		574
Stock-based compensation expense			35
Lease Impairment			44
Bad debt expense	6		14
Other adjustments	(5)		(13)
Deferred income taxes	37		93
Change in accounts receivable	6		24
Change in pension and other post retirement liabilities	12		(242)
Change in accounts payable and other liabilities	39		77
Change in prepaid expenses, income taxes, and other assets	7		(15)
Net cash provided from (used by) operating activities	380		757
Cash flows provided from (used by) investing activities:
Capital expenditures	(269)		(1,088)
Proceeds on sale of assets			1
Purchase of short-term investments			(2,600)
Sale of short-term investments			300
Other			2
Net cash used by investing activities	(269)		(3,385)
Cash flows provided from (used by) financing activities:
Long-term debt principal payments	(4)		(7)
Proceeds from long-term debt borrowings			1,200
Financing costs paid			(17)
Finance lease obligation payments	(4)		(10)
Taxes paid on behalf of employees for shares withheld			(7)
Other	1		(1)
Net cash provided from (used by) financing activities	(7)		1,158
Increase (decrease) in cash, cash equivalents, and restricted cash	104		(1,470)
Cash, cash equivalents, and restricted cash at January 1,	940		2,178
Cash, cash equivalents, and restricted cash at June 30,	1,044	$ 940	708
Cash paid during the period for:
Interest	84		198
Income tax payments, net	24		$ 9
Predecessor [Member]
Cash flows provided from (used by) operating activities:
Net Income		4,541
Adjustments to reconcile net income to net cash provided from (used by) operating activities:
Depreciation and amortization		506
Stock-based compensation expense		(1)
Non-cash reorganization items, net		(5,467)
Bad debt expense		14
Other adjustments		1
Deferred income taxes		(148)
Change in accounts receivable		36
Change in pension and other post retirement liabilities		(12)
Change in accounts payable and other liabilities		(156)
Change in prepaid expenses, income taxes, and other assets		46
Net cash provided from (used by) operating activities		(654)
Cash flows provided from (used by) investing activities:
Capital expenditures		(500)
Proceeds on sale of assets		9
Other		1
Net cash used by investing activities		(490)
Cash flows provided from (used by) financing activities:
Long-term debt principal payments		(1)
Proceeds from long-term debt borrowings		225
Financing costs paid		(4)
Finance lease obligation payments		(7)
Other		(16)
Net cash provided from (used by) financing activities		197
Increase (decrease) in cash, cash equivalents, and restricted cash		(947)
Cash, cash equivalents, and restricted cash at January 1,	$ 940	1,887
Cash, cash equivalents, and restricted cash at June 30,		940
Cash paid during the period for:
Interest		84
Income tax payments, net		9
Reorganization items, net		$ 1,397