Segment Information - Operating Profit (Loss) by Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information
Revenues	$ 20,705,000,000	$ 23,838,000,000	$ 22,877,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	(15,202,000,000)	753,000,000	680,000,000
Inventory impairment and related charges	(246,000,000)	0	(105,000,000)
Goodwill impairment	(14,773,000,000)	0	0
Separation and merger related	(134,000,000)	(184,000,000)	(153,000,000)
Other non-operating income (loss), net	1,040,000,000	(84,000,000)	202,000,000
Interest expense, net	(264,000,000)	(237,000,000)	(223,000,000)
Operating segments
Segment Reporting Information
Revenues	20,705,000,000	23,838,000,000	22,877,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	1,504,000,000	2,035,000,000	1,796,000,000
Corporate
Segment income (loss) before income taxes
Income (loss) before income taxes	(464,000,000)	(433,000,000)	(405,000,000)
Segment reconciling items
Segment income (loss) before income taxes
Inventory impairment and related charges	(246,000,000)	0	(105,000,000)
Goodwill impairment	(14,773,000,000)	0	0
Restructuring, impairment and other	(1,866,000,000)	(342,000,000)	(433,000,000)
Separation and merger related	(134,000,000)	(184,000,000)	(153,000,000)
Other non-operating income (loss), net	1,040,000,000	(84,000,000)	202,000,000
Interest expense, net	(264,000,000)	(237,000,000)	(223,000,000)
Oilfield Services
Segment income (loss) before income taxes
Goodwill impairment	(11,484,000,000)
Oilfield Services | Operating segments
Segment Reporting Information
Revenues	10,140,000,000	12,889,000,000	11,617,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	487,000,000	917,000,000	785,000,000
Oilfield Equipment
Segment income (loss) before income taxes
Goodwill impairment	(3,289,000,000)
Oilfield Equipment | Operating segments
Segment Reporting Information
Revenues	2,844,000,000	2,921,000,000	2,641,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	19,000,000	55,000,000	0
Turbo-machinery & Process Solutions
Segment income (loss) before income taxes
Goodwill impairment	0
Turbo-machinery & Process Solutions | Operating segments
Segment Reporting Information
Revenues	5,705,000,000	5,536,000,000	6,015,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	805,000,000	719,000,000	621,000,000
Digital Solutions
Segment income (loss) before income taxes
Goodwill impairment	0
Digital Solutions | Operating segments
Segment Reporting Information
Revenues	2,015,000,000	2,492,000,000	2,604,000,000
Segment income (loss) before income taxes
Income (loss) before income taxes	$ 193,000,000	$ 343,000,000	$ 390,000,000