Fair Value Measurements - Offsetting of Derivative Assets (Detail) - USD ($) $ in Millions |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Derivative [Line Items] | ||
| Gross Amounts of Recognized Assets | $ 1.9 | $ 7.4 |
| Gross Amounts Offset in the Balance Sheet, Derivative Assets | (1.6) | (3.0) |
| Net Amounts of Assets Presented in the Balance Sheet | 0.3 | 4.4 |
| Foreign exchange currency contracts [Member] | ||
| Derivative [Line Items] | ||
| Gross Amounts of Recognized Assets | 1.9 | 7.4 |
| Gross Amounts Offset in the Balance Sheet, Derivative Assets | (1.6) | (3.0) |
| Net Amounts of Assets Presented in the Balance Sheet | $ 0.3 | $ 4.4 |
| X | ||||||||||
- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Details
|