SHAREHOLDERS' EQUITY - Additional Information (Detail) shares in Millions	12 Months Ended
	Dec. 31, 2017 Vote shares	Dec. 31, 2016 shares	Dec. 31, 2015 shares	Aug. 31, 2017 shares
Stockholders Equity Note [Line Items]
Common stock, voting rights	are generally entitled to one vote per share until they have been held by the same beneficial owner for a continuous period of 48 months, at which time they become entitled to 10 votes per share.
Remaining common stock available for purchase under share repurchase authorizations	49.0
Common stock votes per share | Vote	1
Share Repurchase Program
Stockholders Equity Note [Line Items]
Stock Acquired In Open Market, Shares	17.8	21.6	21.2
Share Repurchase Authorization 2017
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				40.0
Share Held For Continuous Forty Eight Month Period
Stockholders Equity Note [Line Items]
Voting rights, votes per share | Vote	10