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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Statement of Comprehensive Income [Abstract] |  |  |  |
Unrealized hedging gains (losses) and other, tax | $ 3.8 | $ 0.2 | $ 4.0 | $ (2.6)
Reclassification of deferred hedging (gains) losses and other, included in net income, tax | (4.6) | 1.0 | (5.0) | 0.9
Total derivative instruments, tax | (0.8) | 1.2 | (1.0) | (1.7)
Unrealized actuarial gains (losses) and prior service (costs) credits, tax | 0.0 | (0.1) | 0.0 | 2.7
Reclassification of net actuarial and other (gain) loss and amortization of prior service costs, included in net income, tax | 0.9 | 1.7 | 2.7 | 5.7
Total pension and other postretirement benefits, tax | $ 0.9 | $ 1.6 | $ 2.7 | $ 8.4

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- Definition Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 + Details
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