Equity	6 Months Ended
Jun. 30, 2020
Equity [Abstract]
Equity	Note 9—Equity ATM Programs We have authorized an aggregate of $750 million under three $250 million continuous offerings of common units, or at-the-market (ATM) programs. The first two programs concluded in June 2018 and December 2019, respectively. We did not issue any common units under our ATM programs during the three months ended June 30, 2020. For the six months ended June 30, 2020, on a settlement date basis, we issued an aggregate of 40,570 common units under our ATM programs, generating net proceeds of $2 million. For the three and six months ended June 30, 2019, we issued an aggregate of 212,336 and 834,368 common units under our ATM programs, respectively, generating net proceeds of $10 million and $42 million, respectively. Since inception in June 2016 through June 30, 2020, we issued an aggregate of 9,487,055 common units under our ATM programs, and generated net proceeds of $494 million, after broker commissions of $5 million and other costs of $3 million. The net proceeds from sales under the ATM programs are used for general partnership purposes, which may include debt repayment, acquisitions, capital expenditures and additions to working capital.

We have authorized an aggregate of $750 million under three $250 million continuous offerings of common units, or at-the-market (ATM) programs. The first two programs concluded in June 2018 and December 2019, respectively. We did not issue any common units under our ATM programs during the three months ended June 30, 2020. For the six months ended June 30, 2020, on a settlement date basis, we issued an aggregate of 40,570 common units under our ATM programs, generating net proceeds of $2 million. For the three and six months ended June 30, 2019, we issued an aggregate of 212,336 and 834,368 common units under our ATM programs, respectively, generating net proceeds of $10 million and $42 million, respectively. Since inception in June 2016 through June 30, 2020, we issued an aggregate of 9,487,055 common units under our ATM programs, and generated net proceeds of $494 million, after broker commissions of $5 million and other costs of $3 million. The net proceeds from sales under the ATM programs are used for general partnership purposes, which may include debt repayment, acquisitions, capital expenditures and additions to working capital.