CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	1 Months Ended				12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Jul. 31, 2013	Feb. 28, 2013	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF EQUITY
Cash dividends per share (in dollars per share)	$ 0.40	$ 0.35	$ 0.33	$ 0.30	$ 1.40	$ 1.26