CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.625	$ 0.625
Common stock, shares authorized	860,000,000	860,000,000
Common stock, shares issued	408,251,989	408,041,088
Treasury stock, shares	18,184,997	12,268,180