Equity (Details)	3 Months Ended		6 Months Ended		49 Months Ended
	Jun. 30, 2020 offering shares	Jun. 30, 2019 USD ($) shares	Jun. 30, 2020 USD ($) offering shares	Jun. 30, 2019 USD ($) shares	Jun. 30, 2020 USD ($) offering shares
Limited Partners' Capital Account [Line Items]
Number of common units issued in public offering (in shares) | shares	0	212,336	40,570	834,368
At The Market Offering Program
Limited Partners' Capital Account [Line Items]
Aggregate authorized amount			$ 750,000,000
Common Units | At The Market Offering Program
Limited Partners' Capital Account [Line Items]
Number of continuous offerings | offering	3		3		3
Authorized amount per program			$ 250,000,000
Number of common units issued in public offering (in shares) | shares	0	212,336	40,570	834,368	9,487,055
Issuance of common units		$ 10,000,000	$ 2,000,000	$ 42,000,000	$ 494,000,000
Brokers commissions					5,000,000
Other costs					$ 3,000,000