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Description of the Business and Summary of Significant Accounting Policies - Additional Information (Details)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
shares
Sep. 30, 2017
USD ($)
Segment
shares
Sep. 30, 2016
USD ($)
shares
Dec. 31, 2016
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Number of business segments | Segment     3    
Business Acquisition [Line Items]          
Unrecognized tax benefit         $ 10.1
Offset of valuation allowance         $ 10.1
Decrease in net cash used in investing activities     $ 237.9 $ 184.3  
Accounting Standards Update 2016-18          
Business Acquisition [Line Items]          
Adjustment to cash, cash equivalents and restricted cash beginning balance     38.1    
Adjustment to cash, cash equivalents and restricted cash ending balance $ 41.6   $ 41.6    
Decrease in net cash used in investing activities       $ 3.5  
Stock Options          
Business Acquisition [Line Items]          
Anti-dilutive securities (in shares) | shares 2.6 3.2 2.6 3.2  
Restricted Stock Units          
Business Acquisition [Line Items]          
Anti-dilutive securities (in shares) | shares 4.2 5.6 4.2 5.6