Consolidated Balance Sheet (Parentheticals) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par or stated value per share	$ 1	$ 1
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares, issued	200,859,676	205,458,331
Common stock, shares outstanding	195,772,876	204,866,770