Quarterly Data (Unaudited) - Schedule of Quarterly Data (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jul. 02, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Data [Line Items]
Revenue	$ 6,347	$ 5,882	$ 5,994	$ 5,615	$ 6,264	$ 5,665	$ 5,548	$ 5,399			$ 23,838	$ 22,877	$ 17,179
Gross profit	1,295	1,101	1,062	976	1,236	973	936	841			4,432	3,986
Restructuring, impairment and other	159	71	50	62	59	66	146	162			342	433	412
Separation and merger related	57	54	40	34	41	17	50	46			184	153	373
Net income (loss) attributable to Baker Hughes Company	$ 86	$ 110	$ (18)	$ 65	$ 276	$ 38	$ (51)	$ (143)			$ 241	$ 120	$ (499)
Cash dividend \| Class A
Quarterly Financial Data [Line Items]
Dividends per share (in dollars per share)	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.72	$ 0.35	$ 0.72	$ 0.72	$ 0.35

[Line Items] for Quarterly Financial Data [Table]

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