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Financial Instruments and Hedging Activities (Fair Values of Derivative Instruments Included on Consolidated Balance Sheet) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | $ 156.0 | $ 167.9
Liability Derivatives Fair Value | 55.7 | 45.4
Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | 3.7 | 0.6
Liability Derivatives Fair Value | 48.4 | 38.6
Derivatives Not Designated as Hedging Instruments |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | 152.3 | 167.3
Liability Derivatives Fair Value | 7.3 | 6.8
Interest Rate Contract [Member] | Accrued Expenses And Other Current Liabilities [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 1.0 | 0.3
Interest Rate Contract [Member] | Other Liabilities [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 17.5 | 5.9
Equity [Member] | Accrued Expenses And Other Current Liabilities [Member] | Derivatives Not Designated as Hedging Instruments |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 5.2 | 1.3
Equity [Member] | Other Assets [Member] | Derivatives Not Designated as Hedging Instruments |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | 152.3 | 167.3
Foreign Exchange [Member] | Accrued Expenses And Other Current Liabilities [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 29.0 | 31.0
Foreign Exchange [Member] | Accrued Expenses And Other Current Liabilities [Member] | Derivatives Not Designated as Hedging Instruments |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 2.1 | 5.5
Foreign Exchange [Member] | Prepaid Expenses and Other Current Assets [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | 2.9 | 0.5
Foreign Exchange [Member] | Other Liabilities [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives Fair Value | 0.9 | 1.4
Foreign Exchange [Member] | Other Assets [Member] | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives Fair Value | $ 0.8 | $ 0.1

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or 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 liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 + Details
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