Commitments and Contingencies (Capital Leases as Lessee) (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2017
USD ($)
| |
| Commitments and Contingencies Disclosure [Abstract] | |
| Capital lease term | 14 years |
| Capital lease obligations | $ 98.6 |
| X | ||||||||||
- Definition Capital Lease, Term No definition available.
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| X | ||||||||||
- Definition Capital Lease Terms, Present Value at Inception No definition available.
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| X | ||||||||||
- References No definition available.
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