Recent Accounting Pronouncements (Details) $ in Millions |
Dec. 31, 2017
USD ($)
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| New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | |
| Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals | $ 404.7 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Contractually required future rental payments receivable on noncancelable subleasing arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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