v3.8.0.1
PARTNERS' EQUITY Table 1 - Preferred Units (Details) - USD ($)
$ / shares in Units, $ in Millions
Nov. 30, 2017
Apr. 28, 2017
Nov. 25, 2016
Series A Preferred Limited Partner [Member]      
Class of Stock [Line Items]      
Issuance of units (units)     9,060,000
Units issued, price per unit     $ 25.00
Net proceeds from issuance of units     $ 218.4
Preferred units liquidation preference     $ 25.00
Preferred units distribution percentage     8.50%
Per unit distribution     $ 2.125
Preferred unit, distribution payment rate, variable description     Three-month LIBOR plus 6.766%
Preferred units, description     We may redeem any of our outstanding Preferred Units at any time on or after the optional redemption date set forth above for each series of Preferred Units, in whole or in part, at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to, but not including, the date of redemption, whether or not declared. We may also redeem the Preferred Units upon the occurrence of certain rating events or a change of control as defined in our partnership agreement. In the case of the latter instance, if we choose not to redeem the Preferred Units, the preferred unitholders may have the ability to convert their Preferred Units to common units at the then applicable conversion rate. Holders of the Preferred Units have no voting rights except for certain exceptions set forth in our partnership agreement.
Series B Preferred Limited Partner [Member]      
Class of Stock [Line Items]      
Issuance of units (units)   15,400,000  
Units issued, price per unit   $ 25.00  
Net proceeds from issuance of units   $ 371.8  
Preferred units liquidation preference   $ 25.00  
Preferred units distribution percentage   7.625%  
Per unit distribution   $ 1.90625  
Preferred unit, distribution payment rate, variable description   Three-month LIBOR plus 5.643%  
Preferred units, description   We may redeem any of our outstanding Preferred Units at any time on or after the optional redemption date, set forth above for each series of Preferred Units, in whole or in part, at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to, but not including, the date of redemption, whether or not declared. We may also redeem the Preferred Units upon the occurrence of certain rating events or a change of control as defined in our partnership agreement. In the case of the latter instance, if we choose not to redeem the Preferred Units, the preferred unitholders may have the ability to convert their Preferred Units to common units at the then applicable conversion rate. Holders of the Preferred Units have no voting rights except for certain exceptions set forth in our partnership agreement.  
Series C Preferred Limited Partner [Member]      
Class of Stock [Line Items]      
Issuance of units (units) 6,900,000    
Units issued, price per unit $ 25.00    
Net proceeds from issuance of units $ 166.7    
Preferred units liquidation preference $ 25.00    
Preferred units distribution percentage 9.00%    
Per unit distribution $ 2.25    
Preferred unit, distribution payment rate, variable description Three-month LIBOR plus 6.88%    
Preferred units, description We may redeem any of our outstanding Preferred Units at any time on or after the optional redemption date, set forth above for each series of Preferred Units, in whole or in part, at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to, but not including, the date of redemption, whether or not declared. We may also redeem the Preferred Units upon the occurrence of certain rating events or a change of control as defined in our partnership agreement. In the case of the latter instance, if we choose not to redeem the Preferred Units, the preferred unitholders may have the ability to convert their Preferred Units to common units at the then applicable conversion rate. Holders of the Preferred Units have no voting rights except for certain exceptions set forth in our partnership agreement.