Distributions Paid and Payable - Preferred Stock and Realty Income, L.P. Units (Details) - Class F Preferred Stock $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended
	Apr. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) dividend $ / shares
Distributions Paid and Payable
Preferred stock redeemed | shares	16,350,000
Number of monthly distributions paid | dividend		3
Dividends paid per preferred share | $ / shares	$ 0.101215	$ 0.414063
Preferred stock dividends paid | $	$ 1.7	$ 3.9