Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Statement of Financial Position [Abstract]
Common stock, par value (usd per share)	$ 1	$ 1	$ 1
Common stock, shares outstanding (shares)	95,997,693	100,129,380	101,333,029
Preferred stock, par value (usd per share)
Preferred stock, shares outstanding (shares)	0	40,406	54,946