Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Weighted-Average Assumptions used to Determine Net Periodic Benefit Cost) (Detail)

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BENEFIT PLANS (Weighted-Average Assumptions used to Determine Net Periodic Benefit Cost) (Detail)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.26% 5.07% 4.17%
Expected return on plan assets 7.44% 7.43% 7.43%
Rate of compensation increase 4.71% 3.34% 3.26%
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.05% 4.49% 4.03%
Expected return on plan assets 7.50% 7.50% 7.50%