Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 5	$ 5	$ 5
Common stock, shares authorized	750,000,000	750,000,000	750,000,000
Common stock, shares outstanding	120,741,810	120,376,721	120,081,995
Treasury shares, shares	216,523	216,523	216,523