Equity - Changes in Number of Shares Outstanding (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Nov. 02, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares upon vesting of restricted stock units (in shares)		505,000
Issue of shares on exercises of stock options (in shares)		683,000
Stock repurchase program, authorized amount				$ 3,000,000,000
Common Stock | Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2017 (in shares)		422,208,000	0
Exchange of Class B Common Stock for Class A Common Stock (in shares)		101,200,000	0
Stock repurchase program (in shares)		(11,500,992)	(6,047,000)
Balance at December 31, 2018 (in shares)		513,399,000	422,208,000
Stock repurchase program (in shares)		11,500,992	6,047,000
Stock repurchase program, acquired value		$ 374,000,000
Common Stock | Class A | GE Transaction Agreement
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares on business combination at July 3, 2017 (in shares)		0	427,709,000
Common Stock | Class A | Restricted Stock Units (RSUs)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares upon vesting of restricted stock units (in shares)		835,000	290,000
Common Stock | Class A | Options
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares on exercises of stock options (in shares)		657,000	256,000
Common Stock | Class B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2017 (in shares)		706,985,000	0
Exchange of Class B Common Stock for Class A Common Stock (in shares)		(101,200,000)	0
Stock repurchase program (in shares)		(84,241,000)	(10,126,000)
Balance at December 31, 2018 (in shares)		521,543,000	706,985,000
Stock repurchase program (in shares)		84,241,000	10,126,000
Common Stock | Class B | GE Transaction Agreement
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares on business combination at July 3, 2017 (in shares)		0	717,111,000
Common Stock | Class B | Restricted Stock Units (RSUs)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares upon vesting of restricted stock units (in shares)		0	0
Common Stock | Class B | Options
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares on exercises of stock options (in shares)		0	0
Common Stock and BHGE LLC Units | Class B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchase program (in shares)		(19,241,160)
Stock repurchase program (in shares)		19,241,160
Stock repurchase program, acquired value		$ 626,000,000
BHGE LLC Units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchased, units (in units)	65,000,000
Repurchased, aggregate amount of units	$ 1,461,000,000
Repurchased, per unit (in dollars per unit)	$ 22.48