Segment Information - Operating profit (loss) by segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summarized financial information [Abstract]
Income (loss) before income taxes and equity in loss of affiliate	$ 58	$ (30)	$ (27)	$ 44
Inventory impairment	(15)	(4)	(76)	(19)
Merger and related costs	(50)	(85)	(96)	(151)
Other non operating income, net	43	50	45	58
Interest expense, net	(63)	(14)	(109)	(34)
Operating segments
Summarized financial information [Abstract]
Revenue	5,548	3,015	10,947	6,079
Income (loss) before income taxes and equity in loss of affiliate	387	152	714	481
Corporate
Summarized financial information [Abstract]
Income (loss) before income taxes and equity in loss of affiliate	(98)	(70)	(196)	(190)
Segment reconciling items
Summarized financial information [Abstract]
Inventory impairment	(15)	(4)	(76)	(19)
Restructuring, impairment and other	(146)	(59)	(308)	(101)
Merger and related costs	(50)	(85)	(96)	(151)
Other non operating income, net	43	50	45	58
Interest expense, net	(63)	(14)	(109)	(34)
Oilfield Services \| Operating segments
Summarized financial information [Abstract]
Revenue	2,884	228	5,562	440
Income (loss) before income taxes and equity in loss of affiliate	189	(66)	330	(123)
Oilfield Equipment \| Operating segments
Summarized financial information [Abstract]
Revenue	617	681	1,281	1,397
Income (loss) before income taxes and equity in loss of affiliate	(12)	17	(18)	67
Turbomachinery & Process Solutions \| Operating segments
Summarized financial information [Abstract]
Revenue	1,385	1,586	2,845	3,230
Income (loss) before income taxes and equity in loss of affiliate	113	122	232	374
Digital Solutions \| Operating segments
Summarized financial information [Abstract]
Revenue	662	520	1,260	1,011
Income (loss) before income taxes and equity in loss of affiliate	$ 96	$ 79	$ 169	$ 163

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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The net amount of operating interest income (expense).

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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