Unaudited Condensed Consolidated Balance Sheet (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	213,605,552	212,326,642
Common stock, shares outstanding	213,531,666	212,316,642