Consolidated Statements of Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.56	$ 0.50
Dividend equivalents declared per share (in dollars per share)	$ 0.56	$ 0.50