Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs) (Detail)

v3.3.1.900
BENEFIT PLANS (Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs) (Detail)
$ in Millions
 12 Months Ended
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