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Organization (Details) shares in Millions, $ in Millions		1 Months Ended
Organization (Details) shares in Millions, $ in Millions	Oct. 31, 2019 USD ($) shares	Nov. 30, 2018 USD ($)	Nov. 30, 2018 USD ($) shares	Sep. 30, 2019 property	Dec. 31, 2018	Nov. 16, 2018	Nov. 09, 2018
Schedule of Equity Method Investments [Line Items]
Number of real estate properties \| property				294
Necessity Retail Partners
Schedule of Equity Method Investments [Line Items]
Number of real estate properties				11	13
Equity method investment, ownership percentage				20.00%	20.00%	20.00%
Grocery Retail Partners I
Schedule of Equity Method Investments [Line Items]
Number of real estate properties				17	17		17
Equity method investment, ownership percentage				15.00%	15.00%		15.00%
Other significant noncash transaction, value of consideration given		$ 359.0
Cash received from contribution of real estate to joint ventures		$ 161.8
REIT II
Schedule of Equity Method Investments [Line Items]
Business combination, consideration transferred, including equity interest in acquiree held prior to combination			$ 1,900.0
Number of real estate properties						86
Stock issued for merger with PECO III \| shares			95.5
REIT II \| Necessity Retail Partners
Schedule of Equity Method Investments [Line Items]
Number of real estate properties						13
Equity method investment, ownership percentage						20.00%
PECO III \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Stock issued for merger with PECO III \| shares	4.5
Cash payment for merger	$ 21.0
PECO III \| Grocery Retail Partners II \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	10.00%