Statement of Consolidated Changes in Equity (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Common stock, dividends, per share	$ 0.50	$ 0.50
Retained Earnings [Member]
Common stock, dividends, per share	0.50	0.50
Parent [Member]
Common stock, dividends, per share	$ 0.50	$ 0.50