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BENEFIT PLANS (Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Private Equity |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Balance at December 31, 2014 | $ 35.7
Return on plan assets: |
Unrealized | 2.9
Realized | 1.6
Purchases | 5.9
Sales | (4.2)
Balance at December 31, 2015 | 41.9
Hedge Funds |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Balance at December 31, 2014 | 69.7
Return on plan assets: |
Unrealized | 0.7
Realized | 0.2
Purchases | 9.6
Sales | (26.2)
Balance at December 31, 2015 | 54.0
Real Assets |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Balance at December 31, 2014 | 16.5
Return on plan assets: |
Unrealized | 0.0
Realized | 1.7
Purchases | 0.4
Sales | (1.2)
Balance at December 31, 2015 | $ 17.4

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