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Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2019
Supplemental Schedule of Noncash Investing and Financing Activities      
Beneficial interest obtained in exchange for accounts receivable sold $ 121.8 $ 241.9  
Cash dividends declared, but not yet paid $ 4.1 $ 4.1 $ 6.6