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Commitments Contingencies and Guarantees (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract] |  |  |
Operating Leases, Rent Expense | $ 13.7 | $ 12.1 | $ 19.3
Maximum Capital Lease Obligations As Offset Against Industrial Bonds | $ 150.0 |  |

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- Definition Maximum Capital Lease Obligations As Offset Against Industrial Bonds + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
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Balance Type: | debit
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