Consolidated Statements Of Changes In Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Common shares, par value (USD per share)	$ 1	$ 1	$ 1
Dividends per common share (USD per share)	$ 0.25	$ 0.25	$ 0.25