Debt - Credit Facility (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) extension	Dec. 27, 2019 USD ($)	Nov. 01, 2019	Feb. 06, 2019 USD ($)	Dec. 31, 2018 USD ($)	May 23, 2018 USD ($)
Line of Credit Facility [Line Items]
Outstanding balance	$ 5,705,725,000				$ 6,087,922,000
Credit Facility [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 1,045,669,000				$ 401,773,000
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	$ 3,900,000
Maximum aggregate amount outstanding at any one time	$ 50,000,000.0
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				2,000,000,000.0
Outstanding balance	$ 150,000,000.0
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						$ 900,000,000.0
Outstanding balance	$ 900,000,000.0
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%
Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Notional amount	$ 400,000,000.0			$ 900,000,000.0
Interest Rate Swap [Member] | VEREIT Operating Partnership, L.P. [Member]
Line of Credit Facility [Line Items]
Interest rate			3.59%
Interest Rate Swap [Member] | Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.10%
Interest Rate Swap [Member] | Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	25.00%