Consolidated Statement of Capital (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Cash distribution declared, per common share (in dollars per share)	$ 0.775	$ 0.72	$ 1.55	$ 1.44
SL Green Operating Partnership
Cash distribution declared, per common share (in dollars per share)			$ 1.55