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Number of partnership units issued.

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The cash outflow or inflow increase (decrease) in distribution due to real estate partnership based upon payments and accruals.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Noncontrolling Interests - Change in Carrying Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 28, 2019	Dec. 31, 2018	Apr. 30, 2018	Mar. 30, 2018	Jun. 27, 2013	Jan. 22, 2013
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			$ 32,236
Redemptions			(20,225)	$ 0
Allocation of net income	$ 226	$ 317	514	$ 469
Carrying value at end of the period	$ 25,092		$ 25,092
Tau Operating Partnership
Change in the carrying value of all noncontrolling interests
Number of partnership units issued										317,022
Number of partnership units outstanding	0		0			317,022
Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Shares issued in conjunction with acquisition			$ 6,300
Number of partnership units issued	89,322	373,797	89,322	373,797	89,322		131,790	242,007	534,546
Number of partnership units outstanding	463,119		463,119			373,797
Noncontrolling interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			$ 32,236
Redemptions			(13,356)	$ (1,468)
Shares issued in conjunction with acquisition			6,286
Distributions			(588)
Allocation of net income			514
Carrying value at end of the period	$ 25,092		25,092
Noncontrolling interests \| Tau Operating Partnership
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			13,356
Redemptions			(13,356)
Shares issued in conjunction with acquisition			0
Distributions			0
Allocation of net income			0
Carrying value at end of the period	0		0
Noncontrolling interests \| Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			17,912
Redemptions			0
Shares issued in conjunction with acquisition			6,286
Distributions			(588)
Allocation of net income			505
Carrying value at end of the period	24,115		24,115
Noncontrolling interests \| Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			968
Redemptions			0
Shares issued in conjunction with acquisition			0
Distributions			0
Allocation of net income			9
Carrying value at end of the period	$ 977		$ 977