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Lease Obligations (Future Minimum Rental Commitments For All Long-Term Non-Cancelable Operating Leases) (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Leases [Abstract]  
2017 $ 33.6
2018 27.3
2019 20.1
2020 16.2
2021 12.2
Thereafter 23.4
Total $ 132.8