Condensed Consolidated Statement of Equity (Deficit) - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2017	$ (2,742)	$ 1	$ 526	$ (296)	$ (8)	$ (2,964)	$ (2,741)	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(52)	0	0	0	0	(53)	(53)	1
Other comprehensive income	(8)	0	0	0	(8)	0	(8)	0
Foreign currency translation adjustments	(8)
Elimination of Predecessor equity	1	0	0	0	0	1	1	0
Balance at Sep. 30, 2018	(2,801)	1	526	(296)	(16)	(3,016)	(2,801)	0
Balance at Jun. 30, 2018	(2,777)	1	526	(296)	(10)	(2,998)	(2,777)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(18)	0	0	0	0	(18)	(18)	0
Other comprehensive income	(6)	0	0	0		0	(6)	0
Foreign currency translation adjustments	(6)
Balance at Sep. 30, 2018	(2,801)	1	526	(296)	(16)	(3,016)	(2,801)	0
Elimination of Predecessor Equity	26
Balance at Dec. 31, 2018	(2,914)	1	526	(296)	(18)	(3,125)	(2,912)	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	2,895	0	0	0	0	(160)	(160)	1
Net Income (Loss), Including Portion Attributable to Noncontrolling interest - Predecessor	(159)
Other comprehensive income	(8)	0	0	0	(8)	0	(8)	0
Foreign currency translation adjustments	(8)
Balance at Jun. 30, 2019	(3,081)	1	526	(296)	(26)	(3,285)	(3,080)	(1)
Elimination of Predecessor Equity	0	(1)	(526)	296	0	231	0	0
Stock Issued During Period, Value, New Issues	1,157	0	1,157	0	0	0	1,157	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	3,054	0	0	0	0	3,054	3,054	0
Net Income (Loss), Including Portion Attributable to Noncontrolling interest - Predecessor	3,054
Other comprehensive income	0
Foreign currency translation adjustments	0
Elimination of Predecessor AOCI	26	0	0	0	26	0	26	0
Balance at Jul. 01, 2019	(1)	0	0	0	0	0	0	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(43)	0	0	0	0	(43)	(43)	0
Other comprehensive income	(16)	0	0	0	(16)	0	(16)	0
Foreign currency translation adjustments	(16)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	5	0		0	0	0	5	0
Balance at Sep. 30, 2019	$ 1,102	$ 0	$ 1,162	$ 0	$ (16)	$ (43)	$ 1,103	$ (1)