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BALANCE SHEET ITEMS - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2017
Dec. 31, 2017
Mar. 31, 2017
Components of acquired intangible assets      
Cost method investment   $ 129.7  
Customer working capital advances   171.3 $ 231.3
Customer related accruals   441.0 501.9
Deferred revenue   344.0 280.7
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Wink Labs Inc | Third-Party Private Company      
Components of acquired intangible assets      
Shares of investment received as consideration $ 59.0    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Wink Labs Inc | Other charges (income) | Third-Party Private Company      
Components of acquired intangible assets      
Gain on sale of non-core business $ 38.7    
Asset-Backed Securitization Programs      
Components of acquired intangible assets      
Transferor's interests in transferred financial assets, fair value   420.6 $ 506.5
Other Assets | Third-Party Private Company      
Components of acquired intangible assets      
Investment in subsidiaries   $ 76.5