Condensed Consolidated Statements of Equity (Parenthetical) - $ / shares			3 Months Ended		6 Months Ended
	May 09, 2017	Feb. 23, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements of Equity
Dividends declared per common share (in dollars per share)	$ 0.48	$ 0.48	$ 0.48	$ 0.48	$ 0.96	$ 0.96