Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Securities held to maturity		$ 319,000
Statement of Financial Position [Abstract]
Common stock, par value	$ 2.5	$ 2.5
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	217,800,000	216,800,000
Treasury stock, shares	25,200,000	17,600,000