EID Income Taxes Geographic Allocation (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Loss from Continuing Operations before Income Taxes	$ (461)	$ (37)	$ (316)	$ (6,806)
Benefit from income taxes on continuing operations	(2,221)	(395)	(46)	(31)
Net (loss) income from continuing operations after income taxes	1,192	1,761	(941)	(5,027)
Continuing Operations [Member]
Loss from Continuing Operations before Income Taxes, Domestic	(961)	(519)	(1,352)	(5,040)
Income (Loss) from Continuing Operations before Income Taxes, Foreign	500	482	1,036	(1,766)
Loss from Continuing Operations before Income Taxes	(461)	(37)	(316)	(6,806)
Current Federal Tax (Benefit) Expense	8	(581)	(11)	(112)
Current State and Local Tax Expense (Benefit)	11	(117)	1	(32)
Current Foreign Tax Expense	287	81	317	446
Total current tax expense (benefit)	306	(617)	307	302
Deferred Federal Income Tax (Benefit) Expense	(2,373)	188	(392)	(124)
Deferred State and Local Income Tax Expense (Benefit)	3	79	156	(39)
Deferred Foreign Income Tax Benefit	(157)	(45)	(117)	(170)
Total deferred tax (benefit) expense	(2,527)	222	(353)	(333)
Benefit from income taxes on continuing operations	(2,221)	(395)	(46)	(31)
Net (loss) income from continuing operations after income taxes	1,760	358	(270)	(6,775)
EID [Member]
Loss from Continuing Operations before Income Taxes	(461)	(37)	(422)	(6,806)
Benefit from income taxes on continuing operations	(2,221)	(395)	(71)	(31)
Net (loss) income from continuing operations after income taxes	1,192	1,761	(1,022)	(5,027)
EID [Member] | Continuing Operations [Member]
Loss from Continuing Operations before Income Taxes, Domestic	(961)	(519)	(1,458)	(5,040)
Income (Loss) from Continuing Operations before Income Taxes, Foreign	500	482	1,036	(1,766)
Loss from Continuing Operations before Income Taxes	(461)	(37)	(422)	(6,806)
Current Federal Tax (Benefit) Expense	8	(581)	(11)	(112)
Current State and Local Tax Expense (Benefit)	11	(117)	1	(32)
Current Foreign Tax Expense	287	81	317	446
Total current tax expense (benefit)	306	(617)	307	302
Deferred Federal Income Tax (Benefit) Expense	(2,373)	188	(417)	(124)
Deferred State and Local Income Tax Expense (Benefit)	3	79	156	(39)
Deferred Foreign Income Tax Benefit	(157)	(45)	(117)	(170)
Total deferred tax (benefit) expense	(2,527)	222	(378)	(333)
Benefit from income taxes on continuing operations	(2,221)	(395)	(71)	(31)
Net (loss) income from continuing operations after income taxes	$ 1,760	$ 358	$ (351)	$ (6,775)