CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	243,379,604	242,416,424
Treasury stock, shares	7,874,779	7,359,983