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Contractual Commitments Contingencies and Off-Balance Sheet Arrangements (Minimum Commitments Under Obligation From Various Facilities And Equipment Leases and Software License Agreements) (Details)
$ in Millions
Jun. 30, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2018 $ 107.1
2019 102.1
2020 77.1
2021 58.7
2022 47.8
Thereafter 146.7
Future Minimum Payments Due $ 539.5