Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Components of Net Periodic Benefit Cost) (Detail)

v3.3.1.900
BENEFIT PLANS (Components of Net Periodic Benefit Cost) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 4.2 $ 4.5 $ 5.4
Interest cost 30.4 31.1 28.9
Expected return on plan assets (39.6) (39.7) (39.0)
Amortization of prior service cost 0.9 0.8 1.3
Recognized actuarial loss 15.8 12.9 17.0
Net periodic benefit cost 11.7 9.6 13.6
Curtailments 0.0 0.0 0.0
Settlements 0.0 0.0 0.0
Total net periodic benefit cost 11.7 9.6 13.6
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.3 0.3 0.5
Interest cost 0.7 0.8 1.1
Expected return on plan assets (1.5) (1.6) (1.6)
Amortization of prior service cost (1.2) 0.6 (0.5)
Recognized actuarial loss 0.6 (1.2) 3.2
Net periodic benefit cost (1.1) (1.1) 2.7
Curtailments 0.0 0.0 0.0
Settlements 0.0 0.0 0.0
Total net periodic benefit cost $ (1.1) $ (1.1) $ 2.7