Statement of Changes in Consolidated Equity (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Preferred, dividends per share			$ 3.75	$ 3.75
Common stock, dividends per share	$ 0.03	$ 0.12	$ 0.12	$ 0.12
Preferred Class A [Member]
Preferred, dividends per share		$ 3.75
Preferred Class B [Member]
Preferred, dividends per share		$ 7.53993