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Investments (Textuals) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]      
Accounts receivable with affiliates $ 14.2    
Accounts payable with affiliates 9.8    
Investments (Textuals)      
Realized gains and proceeds from the sale of securities 0.0 $ 0.0  
Cash surrender value of insurance contracts 9.3   $ 11.1
Interest rate swap asset, carrying value and fair value $ 2.8   $ 4.8
Inspur (Suzhou) Financial Technology Service Co Ltd [Member]      
Related Party Transaction [Line Items]      
Strategic alliance, ownership percentage 40.00%    
Aisino-Wincor Retail And Banking Systems (Shanghai) Co.,Ltd [Member]      
Related Party Transaction [Line Items]      
Strategic alliance, ownership percentage 43.60%