Label	Element	Value
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	$ 37,600,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	6,700,000
Partners' Capital Account, Unit-based Payment Arrangement, Amount	us-gaap_PartnersCapitalAccountUnitBasedCompensation	100,000
General Partner [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	1,200,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1,200,000
Noncontrolling Interest [Member]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	6,700,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	5,800,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	136,900,000
Member Units [Member] | BP Holdco [Member] | Subordinated Units [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	18,200,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	20,200,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	(689,200,000)
Member Units [Member] | General Public [Member] | Common Units [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	18,200,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	20,300,000
Partners' Capital Account, Unit-based Payment Arrangement, Amount	us-gaap_PartnersCapitalAccountUnitBasedCompensation	100,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	$ 791,300,000