Financial Instruments Effect of Derivative Instruments (Details) - USD ($) $ in Millions		1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
		Sep. 30, 2017	Aug. 31, 2017	Sep. 30, 2018	Aug. 31, 2017	Sep. 30, 2018
Successor [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax		$ 0		$ (5)		$ (4)
Gain (Loss) on Derivative Instruments, Net, Pretax		112		30		38
Successor [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax		0		(5)		(4)
Gain on Hedging Activity, Pre-tax		0		(1)		6
Successor [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax		0		(5)		(4)
Successor [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Commodity Contract [Member] | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain on Hedging Activity, Pre-tax	[1],[2]	0		(1)		6
Successor [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax		112		31		32
Successor [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax	[2]	0		0		5
Successor [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Sundry Income - net
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax	[3]	$ 112		$ 31		$ 27
Predecessor [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax			$ 1		$ 5
Gain (Loss) on Derivative Instruments, Net, Pretax			(258)		(408)
Predecessor [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax			1		5
Gain on Hedging Activity, Pre-tax			0		21
Predecessor [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Other Comprehensive Income (Loss), Pre-Tax			1		5
Predecessor [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Commodity Contract [Member] | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain on Hedging Activity, Pre-tax	[1],[2]		0		21
Predecessor [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax			(258)		(429)
Predecessor [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax	[2]		2		2
Predecessor [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Sundry Income - net
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Pre-tax	[3]		$ (260)		$ (431)

[1] For cash flow hedges, this represents the portion of the gain (loss) reclassified from accumulated OCI into income during the period.

[2] Recorded in cost of goods sold.

[3] Gain recognized in sundry income (expense) - net was partially offset by the related gain on the foreign currency-denominated monetary assets and liabilities of the company's operations. See Note 8 for additional information.