FINANCIAL INSTRUMENTS - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Investments, All Other Investments [Abstract]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 2.3	$ 4.2	$ (0.2)	$ 2.5	$ 5.5	$ 1.7