Net Income Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Noble Midstream Partners LP	$ 44,617	$ 41,670	$ 120,562	$ 97,604
Less: Net Income Attributable to Incentive Distribution Rights	1,462	223	3,415	315
Net Income Attributable to Limited Partners	$ 43,155	$ 41,447	$ 117,147	$ 97,289
Net Income Attributable to Limited Partners Per Limited Partner Common and Subordinated Unit - Basic (in usd per unit)	$ 1.09	$ 1.15	$ 2.96	$ 2.93
Net Income Attributable to Limited Partners Per Limited Partner Common and Subordinated Unit - Diluted (in usd per unit)	$ 1.09	$ 1.15	$ 2.96	$ 2.92
Antidilutive Restricted Units (units)	21	4	22	6
Common Units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Limited Partners	$ 25,825	$ 23,084	$ 70,093	$ 51,117
Weighed Average Limited Partner Units Outstanding, Basic (in units)	23,688	19,990	23,686	17,354
Weighed Average Limited Partner Units Outstanding, Diluted (in units)	23,704	20,005	23,701	17,365
Noble | Subordinated Units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Limited Partners	$ 17,330	$ 18,363	$ 47,054	$ 46,172
Weighed Average Limited Partner Units Outstanding, Basic (in units)	15,903	15,903	15,903	15,903
Weighed Average Limited Partner Units Outstanding, Diluted (in units)	15,903	15,903	15,903	15,903