Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) employee in Thousands, $ in Millions					1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 16, 2019 USD ($) shares	Aug. 31, 2019	Oct. 31, 2018	Nov. 30, 2018 shares	Sep. 30, 2019	Dec. 31, 2019 USD ($) employee country shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of countries in which entity operates (more than) | country							120
Number of our employees | employee							68
Research and development expenses							$ 687	$ 700	$ 501
Restricted cash and cash equivalents held in bank accounts							1,102	1,208
Operating lease, liability							$ 842
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use asset										$ 844
Operating lease, liability										$ 844
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Performance obligations expected to be satisfied, expected timing							P10Y
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Performance obligations expected to be satisfied, expected timing							P20Y
General Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash and cash equivalents held in bank accounts							$ 142	461
Related party amount, due to related party | GE
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash							$ 162	$ 747
BHGE LLC | Baker Hughes Incorporated [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Approximate interest	63.30%
BHGE LLC | General Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Approximate interest	36.70%
Class A | BHGE LLC | General Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares					101,200,000
Stock Repurchased and Retired During Period, Shares | shares							132,250,000
Class B | BHGE LLC | General Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares		65,000,000
Payments for repurchase of common stock		$ 250
Approximate interest				62.50%	50.40%
Stock repurchased (in shares) | shares		11,865,211
Class B | Baker Hughes Incorporated [Member] | General Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Approximate interest			50.30%			36.80%