CAPITAL STOCK - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		137 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased under settlement of employee tax withholding obligations	0.1	0.1
Shares repurchased aggregate value under settlement of employee tax withholding obligations	$ 5.3	$ 2.3
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	1.0	0.0	22.1
Aggregate cost of repurchase	$ 50.0		$ 909.4