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CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Unrealized net (loss) gain on cash flow derivative instruments, related income tax benefit (provision) $ 0.7 $ 0.6 $ (0.2)
Change in pension liability, related income tax (provision) benefit $ (7.5) $ 5.7 $ (0.5)