Consolidated Statement of Capital (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash distribution declared, per common share (in dollars per share)	$ 0.60	$ 0.50	$ 1.2	$ 1
SL Green Operating Partnership
Cash distribution declared, per common share (in dollars per share)	$ 0.60	$ 0.50	$ 1.2	$ 1