Consolidated Statement Of Changes In Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Dividends (in usd per share)	$ 0.50	$ 0.65	$ 1.50	$ 1.95