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Accumulated Other Comprehensive Loss, Net of Tax Changes in AOCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Available-for-sale securities, before reclassifications | $ 0.0 | $ 0.0 | $ 0.5
Total other comprehensive income, before reclassifications | (135.4) | 122.5 |
Total reclassification from AOCI | 22.1 | 14.1 | 8.1
Accumulated other comprehensive loss, net of tax | (941.1) | (827.8) | (964.4)
Foreign Currency Translation Adjustment |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Foreign currency translation adjustment, before reclassifications | (146.8) | 132.2 |
Foreign currency translation adjustment, amount reclassified from AOCI, net of tax | 15.7 | 1.1 |
Foreign currency translation adjustment, net of tax | (716.4) | (585.3) | (718.6)
Available-for-sale Securities |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Available-for-sale securities, before reclassifications | 0.0 | 0.0 |
Available-for-sale securities, amount reclassified from AOCI, net of tax | 0.0 | (0.6) |
Available-for-sale securities adjustment, net of tax | 0.0 | 0.0 | 0.6
Derivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Derivative instruments, before reclassifications | 0.0 | 0.0 |
Derivative instruments, amount reclassified from AOCI, net of tax | 1.5 | 1.6 |
Derivative Instruments, net of tax | (5.3) | (6.8) | (8.4)
Defined Benefit and Postretirement Plans |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Defined Benefit and Postretirement Plans, before reclassifications | 11.4 | (9.7) |
Defined benefit and Postretirement Plans, amount reclassified from AOCI, net of tax | 4.9 | 12.0 |
Pension and Other Postretirement Benefit Plans, net of tax | $ (219.4) | $ (235.7) | $ (238.0)

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- Definition Accumulated unrealized gain (loss), after tax, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 + Details
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