CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	0 Months Ended			3 Months Ended		6 Months Ended
	Jul. 25, 2013	Apr. 25, 2013	Jan. 24, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF EQUITY
Common dividends, per share (in dollars per share)	$ 0.525	$ 0.525	$ 0.525	$ 0.525	$ 0.50	$ 1.05	$ 1.00