Statements Of Consolidated and Combined Operations - USD ($)
shares in Millions, $ in Millions
2 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Operating Revenues      
Transportation revenues   $ 307.8 $ 247.9
Transportation revenues-affiliated   0.0 28.7
Storage revenues   49.9 36.6
Storage revenues-affiliated   0.0 13.3
Other revenues   5.8 12.7
Total Operating Revenues   363.5 339.2
Operating Expenses      
Operation and maintenance   99.2 110.0
Operation and maintenance-affiliated   42.4 36.1
Depreciation and amortization   37.6 32.3
Gain on sale of assets   (2.6) (5.3)
Property and other taxes   20.8 19.0
Total Operating Expenses   197.4 192.1
Equity Earnings in Unconsolidated Affiliates   15.8 14.9
Operating Income   181.9 162.0
Other Income (Deductions)      
Interest expense   (0.6) 0.0
Interest expense-affiliated   (7.2) (11.4)
Other, net   6.1 4.3
Total Other Deductions, net   (1.7) (7.1)
Income before Income Taxes   180.2 154.9
Income Taxes   0.0 23.7
Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 88.5 180.2 131.2
Net Income 88.5 180.2 $ 131.2
Income (Loss) Attributable to Noncontrolling Interest 75.2 152.9  
Net Income (Loss) Allocated to Limited Partners $ 13.3 $ 27.3  
Net income attributable to partners' ownership interest subsequent to IPO per limited partner unit (basic and diluted)      
Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax $ 0.13 $ 0.25  
Weighted average limited partner units outstanding (basic and diluted)      
Weighted Average Number of Shares Outstanding, Basic and Diluted 100.6 100.6  
Common Units      
Other Income (Deductions)      
Net Income (Loss) Allocated to Limited Partners $ 7.1 $ 13.4  
Net income attributable to partners' ownership interest subsequent to IPO per limited partner unit (basic and diluted)      
Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax $ 0.13 $ 0.25  
Weighted average limited partner units outstanding (basic and diluted)      
Weighted Average Number of Shares Outstanding, Basic and Diluted 53.8 53.8  
Subordinated Units      
Other Income (Deductions)      
Net Income (Loss) Allocated to Limited Partners $ 6.2 $ 11.6  
Net income attributable to partners' ownership interest subsequent to IPO per limited partner unit (basic and diluted)      
Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax $ 0.13 $ 0.25  
Weighted average limited partner units outstanding (basic and diluted)      
Weighted Average Number of Shares Outstanding, Basic and Diluted 46.8 46.8  
Parent | Predecessor      
Other Income (Deductions)      
Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 0.0    
Net Income $ 0.0