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Acquisitions - Additional Information (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2017
USD ($)
Nov. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jul. 31, 2016
USD ($)
Mar. 31, 2017
USD ($)
business
Dec. 31, 2016
business
Sep. 30, 2016
USD ($)
business
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
Business Acquisition [Line Items]                    
Aggregate purchase price, net of cash acquired               $ 448.1 $ 15.4  
Goodwill $ 1,161.5       $ 1,161.5     1,161.5   $ 999.3
Purchase price of intellectual property, gross     $ 95.0       $ 95.0      
Cash payment to acquire intellectual property     90.0         90.0 $ 0.0  
Obligations related to the purchase of intellectual property     5.0       5.0      
Contingent consideration obligations 40.0   $ 40.0   40.0   $ 40.0 40.0    
NACC                    
Business Acquisition [Line Items]                    
Aggregate purchase price in cash       $ 410.0            
Aggregate purchase price, net of cash acquired       406.2            
Net tangible assets acquired       58.8            
Goodwill       129.2            
Intangible assets       $ 218.2            
M&O Systems Inc                    
Business Acquisition [Line Items]                    
Aggregate purchase price in cash   $ 22.3                
Goodwill   17.1                
Intangible assets   11.2                
Aggregate purchase price   24.8                
Note payable to seller incurred on acquisition   2.5                
Net tangible liabilities assumed   $ 3.5                
M&O Systems Inc | Customer Relationships                    
Business Acquisition [Line Items]                    
Weighted average useful life of finite lived intangible assets acquired   7 years                
M&O Systems Inc | Software Technology                    
Business Acquisition [Line Items]                    
Weighted average useful life of finite lived intangible assets acquired   6 years                
MAL                    
Business Acquisition [Line Items]                    
Aggregate purchase price in cash 19.7                  
Goodwill 34.0       34.0     34.0    
Aggregate purchase price 23.7                  
Note payable to seller incurred on acquisition 3.1                  
Net tangible liabilities assumed $ 0.7       $ 0.7     $ 0.7    
Equity interest in acquiree, percentage 25.00%       25.00%     25.00%    
Equity interests in acquiree held by others, percentage 75.00%       75.00%     75.00%    
Contingent consideration obligations $ 0.9       $ 0.9     $ 0.9    
Payable period of liabilities arising from contingencies 4 years                  
Maximum potential payout $ 2.8       $ 2.8     $ 2.8    
Equity interest in acquiree 9.6                  
Gain recognized $ 9.3                  
Investor Communication Solutions                    
Business Acquisition [Line Items]                    
Number of businesses acquired | business             1      
Global Technology and Operations                    
Business Acquisition [Line Items]                    
Number of businesses acquired | business         1 1