Financial Instruments Fair Value of Derivatives (Details) - Successor [Member] - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		$ 72	$ 46
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1]	(35)	(37)
Derivative Asset		37	9
Derivative Liability, Gross		21	79
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	(15)	(32)
Derivative Liability		6	47
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		20	5
Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		72	46
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1]	(35)	(37)
Derivative Asset		37	9
Accrued and Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Gross		21	79
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	(15)	(32)
Derivative Liability		$ 6	$ 47

[1] Counterparty and cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty. The company held cash collateral of $20 million and $5 million as of December 31, 2018 and 2017, respectively.