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Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative Asset |  |  | $ 5.4
Net assets associated with foreign currency derivatives | $ (12.6) |  | $ 5.4
Maturity period of derivatives (in months) | 18 months |  |
Estimated amount of net gains (losses) associated with derivative instruments, net of tax, in next twelve months | $ (7.9) |  |
Designated as Hedging Instrument | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 206.4 |  |
Designated as Hedging Instrument | United Kingdom, Pounds | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 119.8 |  |
Designated as Hedging Instrument | Australia, Dollars | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 55.7 |  |
Designated as Hedging Instrument | Euro Member Countries, Euro | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 13.5 |  |
Designated as Hedging Instrument | Brazil, Brazil Real | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 3.4 |  |
Designated as Hedging Instrument | Singapore, Dollars | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 5.6 |  |
Designated as Hedging Instrument | Norway, Krone | Foreign Exchange Forward | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 8.4 |  |
Not Designated as Hedging Instrument |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net gains (losses) on derivatives not designated as hedging instruments | (0.1) | $ (3.1) |
Not Designated as Hedging Instrument | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 65.0 |  |
Not Designated as Hedging Instrument | United Kingdom, Pounds | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 20.7 |  |
Not Designated as Hedging Instrument | Nigeria, Nairas | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 5.5 |  |
Not Designated as Hedging Instrument | Thailand, Baht | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 5.4 |  |
Not Designated as Hedging Instrument | Norway, Krone | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | 8.3 |  |
Not Designated as Hedging Instrument | No currency | Foreign Exchange Forward | Fair Value Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Notional Amount | $ 3.3 |  |

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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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