Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Preferred Stock, par value per share (in dollars per share)	$ 1.00	$ 1.00
Preferred Stock, shares authorized (in shares)	4,000,000	4,000,000
Common Stock, par value per share (in dollars per share)	$ 0.01	$ 3.333
Common Stock, shares authorized (in shares)	500,000,000	250,000,000
Common Stock, Shares, Issued	198,348,742	196,656,846
Treasury Stock, Shares	18,775,376	18,736,520