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Employee Costs (Schedule Of Employee Compensation) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Compensation Related Costs [Abstract]      
Wages, salaries and incentive compensation $ 265.6 $ 267.9 $ 279.3
Payroll taxes 26.5 27.4 30.6
Defined contribution and defined benefit pension plan expense, net 29.7 34.5 18.0
Insurance and other benefit costs 24.9 20.6 21.9
Share-based compensation 12.1 10.9 10.3
Total $ 358.8 $ 361.3 $ 360.1