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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS (Parenthetical) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS NON-CASH SUPPLEMENTAL DATA    
Accrued liabilities for other intangible assets $ 10.6 $ 9.5
Accrued liabilities for purchase short-term investment 13.6  
Accounts receivable for sale short-term investment $ 4.0