PENSION (Future service) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 39,742
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	40,665
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	43,660
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	44,673
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	45,858
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	252,510
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	38,138
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	39,090
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	42,081
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	43,094
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	44,291
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	244,713
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	1,604
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	1,575
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	1,579
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	1,579
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	1,567
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 7,797