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Derivative Instruments - Interest Rate Swap Agreements (Parenthetical) (Detail) - 12 months ended Dec. 31, 2015 € in Millions, $ in Millions | USD ($) | EUR (€)
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Derivative [Line Items] |  |
Reducing principal amount of interest rate swaps | $ 76.1 | € 70.1
Minimum [Member] |  |
Derivative [Line Items] |  |
Variable interest rate on Debt | 0.30% |
Maximum [Member] |  |
Derivative [Line Items] |  |
Variable interest rate on Debt | 2.80% |

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- Definition Reduced Principal Amount of Interest Rate Swaps + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |