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Organization, Business Environment and Basis of Presentation - Narrative (Details)
$ in Millions
6 Months Ended
Jun. 30, 2017
USD ($)
Employee
Description of Business and Basis of Presentation [Line Items]  
Total number of employees | Employee 8,906
Percentage of foreign based employees engaged in supporting loan servicing operations 80.00%
Current maturities of borrowings in next 12 months $ 928.7
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
INDIA  
Description of Business and Basis of Presentation [Line Items]  
Total number of employees | Employee 5,678
PHILIPPINES  
Description of Business and Basis of Presentation [Line Items]  
Total number of employees | Employee 761