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Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill, Gross						$ 24,177
Accumulated impairment						(3,754)
Goodwill [Roll Forward]
Goodwill, net, beginning balance			$ 20,396	$ 20,423	$ 20,423
Impairment	$ 0	$ 0	(14,717)	0
Currency exchange and others			6		(27)
Goodwill, net, ending balance	5,685		5,685		20,396
Oilfield Services
Goodwill [Line Items]
Goodwill, Gross						15,382
Accumulated impairment						(2,633)
Goodwill [Roll Forward]
Goodwill, net, beginning balance			12,749	12,749	12,749
Impairment			(11,428)
Currency exchange and others			(20)		0
Goodwill, net, ending balance	1,301		1,301		12,749
Oilfield Equipment
Goodwill [Line Items]
Goodwill, Gross						4,177
Accumulated impairment						(867)
Goodwill [Roll Forward]
Goodwill, net, beginning balance			3,319	3,310	3,310
Impairment			(3,289)
Currency exchange and others			(24)		9
Goodwill, net, ending balance	6		6		3,319
Turbo- machinery & Process Solutions
Goodwill [Line Items]
Goodwill, Gross						2,186
Accumulated impairment						0
Goodwill [Roll Forward]
Goodwill, net, beginning balance			2,171	2,186	2,186
Impairment			0
Currency exchange and others			43		(15)
Goodwill, net, ending balance	2,214		2,214		2,171
Digital Solutions
Goodwill [Line Items]
Goodwill, Gross						2,432
Accumulated impairment						$ (254)
Goodwill [Roll Forward]
Goodwill, net, beginning balance			2,157	$ 2,178	2,178
Impairment			0
Currency exchange and others			7		(21)
Goodwill, net, ending balance	$ 2,164		$ 2,164		$ 2,157