Acquisition - Narrative (Details) a in Thousands, $ in Thousands		2 Months Ended	3 Months Ended
	Jan. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 USD ($) a MMBTU customer mi	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Net Income Attributable to Noble Midstream Partners LP			$ 39,361	$ 24,342
Black Diamond Acquisition
Business Acquisition [Line Items]
Revenues		$ 26,800
Payments to acquire	$ 638,500
Length of pipeline | mi			160
Production per day | MMBTU			300
Net Income Attributable to Noble Midstream Partners LP		$ 4,200
Black Diamond Acquisition
Business Acquisition [Line Items]
Dedicated acres | a			141
Number of customers | customer			6
Business Combination, Acquisition Related Costs			$ 6,000
Black Diamond Gathering LLC
Business Acquisition [Line Items]
Payment to expand acreage dedication			$ 24,100
Increase in duration of the acreage dedication			5 years
Black Diamond Gathering LLC | Black Diamond Acquisition
Business Acquisition [Line Items]
Payments to acquire	638,529
Payment to expand acreage dedication	24,120
Greenfield Member | Black Diamond Acquisition
Business Acquisition [Line Items]
Payments to acquire	318,600
Black Diamond Gathering LLC
Business Acquisition [Line Items]
Ownership interest, equity method		54.40%	54.40%
Ownership promote		4.40%	4.40%
Black Diamond Gathering LLC | Greenfield Member
Business Acquisition [Line Items]
Ownership interest, equity method		45.60%	45.60%
Noble Member | Black Diamond Acquisition
Business Acquisition [Line Items]
Payments to acquire	$ 319,900