Debt - Credit Facility (Details)	3 Months Ended	9 Months Ended
	Dec. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) extension	Dec. 27, 2019 USD ($)	May 23, 2018 USD ($)
Line of Credit Facility [Line Items]
Outstanding balance	$ 5,913,065,000	$ 5,666,052,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Line of Credit Facility [Line Items]
Debt repayments	900,000,000
Credit Facility [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 0	$ 88,000,000
Number of extension option | extension		2
Length of extension option		6 months
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 2,900,000,000
Outstanding balance		$ 1,300,000
Maximum aggregate amount outstanding at any one time		$ 50,000,000
Maximum leverage ratio (less than or equal to)		60.00%
Minimum fixed charge coverage ratio (of at least)		1.5
Secured leverage ratio (less than or equal to)		45.00%
Unencumbered asset value ratio (less than or equal to)		60.00%
Minimum unencumbered interest coverage ratio (of at least)		1.75
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage		0.10%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage		0.30%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 1,500,000,000	2,000,000,000
Outstanding balance		$ 88,000,000
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.775%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.55%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.00%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.55%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.50%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Revolving Credit Facility [Member] | One Month LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.00%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 900,000,000
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.85%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.00%
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.75%