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ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Amortization of pension and other postretirement plan items: |  |  |  |  |
Total net periodic benefit cost, net of tax |  | $ (2.6) | $ (2.2) | $ (7.7) | $ (6.4)
Amount reclassified from accumulated other comprehensive income |  |  |  |  |
Amortization of pension and other postretirement plan items: |  |  |  |  |
Prior service cost | [1] |  |  | 0.3 |
Recognized actuarial loss | [1] |  |  | (12.3) |
Total net periodic benefit cost, before tax |  |  |  | (12.0) |
Total net periodic benefit cost, tax benefit |  |  |  | 4.5 |
Total net periodic benefit cost, net of tax |  |  |  | $ (7.5) |
[1] | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 8 Benefit Plans for additional details).

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- Definition Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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