Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Statement of Financial Position [Abstract]
Common stock, par value (usd per share)	$ 1	$ 1	$ 1
Common stock, shares outstanding (shares)	97,787,954	100,129,380	102,683,128
Preferred stock, par value (usd per share)
Preferred stock, shares outstanding (shares)	5,722	40,406	68,049