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Noncontrolling Interests - Group P Units, 2017 Incentive Program and Limited Partnership Agreements (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 01, 2017
Mar. 31, 2017
Mar. 31, 2016
Noncontrolling Interest [Line Items]      
Weighted-Average Grant-Date Fair Value, Granted   $ 1.25  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate   35.70%  
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period   3 years 11 months  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 89.5  
P Units Issued and Outstanding   71.9  
Performance Reference Price per Share     $ 3.21
Number of Group A Units Canceled Pursuant to the Relinquishment Agreement 30.0    
Number of Operating Group D Units Reallocated If Forfeited 30.0    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   10.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   2.20%  
Performance threshold - 25% [Member] | Operating Group P Unit      
Noncontrolling Interest [Line Items]      
Incremental Percent Of P Units Vested Once Performance Threshold Is Met 20.00%    
Performance threshold - 50% [Member] [Member] | Operating Group P Unit      
Noncontrolling Interest [Line Items]      
Incremental Percent Of P Units Vested Once Performance Threshold Is Met 40.00%    
Aggregate Percent of P Units vested once performance threshold is met 60.00%    
Performance threshold - 75% [Member] | Operating Group P Unit      
Noncontrolling Interest [Line Items]      
Incremental Percent Of P Units Vested Once Performance Threshold Is Met 20.00%    
Aggregate Percent of P Units vested once performance threshold is met 80.00%    
Performance threshold - 125% [Member] | Operating Group P Unit      
Noncontrolling Interest [Line Items]      
Incremental Percent Of P Units Vested Once Performance Threshold Is Met 20.00%    
Aggregate Percent of P Units vested once performance threshold is met 100.00%    
P Units vest - 20% incremental and total [Member]      
Noncontrolling Interest [Line Items]      
Percent of performance condition for P Units vesting 25.00%    
P Units vest - 40% incremental and 60% total [Member]      
Noncontrolling Interest [Line Items]      
Percent of performance condition for P Units vesting 50.00%    
P Unit vest - 20% incremental and 80% total [Member]      
Noncontrolling Interest [Line Items]      
Percent of performance condition for P Units vesting 75.00%    
P Unit vest - 20% incremental and 100% total [Member]      
Noncontrolling Interest [Line Items]      
Percent of performance condition for P Units vesting 125.00%