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Organization, Business Environment and Basis of Presentation - Narrative (Details)
$ in Millions
 9 Months Ended
Nov. 01, 2017
States
Apr. 20, 2017
States
State
Sep. 30, 2017
USD ($)
Employee
States
Description of Business and Basis of Presentation [Line Items]      
Total number of employees | Employee     8,343
Percentage of foreign based employees engaged in supporting loan servicing operations     80.00%
Number of states charging with regulatory action | States   30  
Number of state attorneys general charging with regulatory action | State   2  
Number of states where regulatory actions were resolved | States     19
Current maturities of borrowings in next 12 months | $     $ 1,000.0
Debt instrument, term     364 days
Cumulative-effect adjustment, recognition of excess tax benefits | $     $ 5.0
Cumulative-effect adjustment, change in accounting for forfeitures | $     0.3
Cumulative-effect adjustment, change in accounting for forfeitures, tax | $     $ 0.1
Subsequent Event [Member]      
Description of Business and Basis of Presentation [Line Items]      
Number of states where regulatory actions were resolved | States 21    
Number of states where company is continuing to seek resolutions on regulatory actions | States 9    
INDIA      
Description of Business and Basis of Presentation [Line Items]      
Total number of employees | Employee     5,371
PHILIPPINES      
Description of Business and Basis of Presentation [Line Items]      
Total number of employees | Employee     679