Stockholders' Equity Reclassifications out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Successor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Goods Sold		$ 4,847
Income Tax Expense (Benefit)		27
(Loss) income from continuing operations after income taxes		(216)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		(1)
Successor [Member] | Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Goods Sold	[1]	(1)
Income Tax Expense (Benefit)	[2]	0
(Loss) income from continuing operations after income taxes		(1)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		(1)
Successor [Member] | Unrealized loss on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[3]	0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]	0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		0
Predecessor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Goods Sold			$ 4,152
Income Tax Expense (Benefit)			197
(Loss) income from continuing operations after income taxes			1,178
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			122
Predecessor [Member] | Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Goods Sold	[1]		(8)
Income Tax Expense (Benefit)	[2]		3
(Loss) income from continuing operations after income taxes			(5)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			(5)
Predecessor [Member] | Unrealized loss on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[3]		(1)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]		0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			(1)
Pension Plan | Successor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		0
Pension Plan | Successor [Member] | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]	0
Pension Plan | Successor [Member] | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]	0
Pension Plan | Successor [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax		0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]	0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		0
Pension Plan | Predecessor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			124
Pension Plan | Predecessor [Member] | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]		(1)
Pension Plan | Predecessor [Member] | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]		190
Pension Plan | Predecessor [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax			189
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]		(65)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			124
Other Benefit Plans | Successor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		0
Other Benefit Plans | Successor [Member] | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]	0
Other Benefit Plans | Successor [Member] | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]	0
Other Benefit Plans | Successor [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax		0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]	0
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax		$ 0
Other Benefit Plans | Predecessor [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			4
Other Benefit Plans | Predecessor [Member] | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]		(17)
Other Benefit Plans | Predecessor [Member] | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax	[4]		23
Other Benefit Plans | Predecessor [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Loss, Current Period, before Tax			6
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Tax	[2]		(2)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax			$ 4

[1] Cost of goods sold.

[2] Provision for income taxes from continuing operations.

[3] Sundry income - net.

[4] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost of the company's pension and other benefit plans. See Note 16 for additional information.