CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares				6 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jan. 05, 2017	Jun. 30, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Dividends paid in cash (in dollars per share)	$ 0.57000	$ 0.57	$ 0.57	$ 0.57	$ 2.28