CAPITAL STOCK - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	6 Months Ended		128 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased under settlement of employee tax withholding obligations	0.1	0.2
Shares repurchased aggregate value under settlement of employee tax withholding obligations	$ 2.8	$ 7.5
2006 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program	$ 1,000.0		$ 1,000.0
Repurchase of shares of common stock	0.8	0.6	21.2
Aggregate cost of repurchase	$ 30.0	$ 20.0	$ 859.4