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Investments (Textuals) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]          
Accounts receivable with affiliates $ 15.5   $ 15.5    
Accounts payable with affiliates 8.1   8.1    
Investments (Textuals)          
Realized gains and proceeds from the sale of securities 0.0 $ 0.0 0.0 $ 0.0  
Cash surrender value of insurance contracts 10.1   10.1   $ 11.1
Interest rate swap asset, carrying value and fair value $ 0.6   $ 0.6   $ 4.8
Inspur (Suzhou) Financial Technology Service Co Ltd [Member]          
Related Party Transaction [Line Items]          
Strategic alliance, ownership percentage 40.00%   40.00%    
Aisino-Wincor Retail And Banking Systems (Shanghai) Co.,Ltd [Member]          
Related Party Transaction [Line Items]          
Strategic alliance, ownership percentage 43.60%   43.60%