Debt - Credit Facility (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jan. 24, 2019	Dec. 31, 2018	Jun. 30, 2018	May 23, 2018
Line of Credit Facility [Line Items]
Outstanding balance	$ 5,658,260,000		$ 6,087,922,000
Deferred costs, net	11,197,000		17,515,000
Credit Facility [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 895,033,000		$ 401,773,000
Length of extension option	6 months
Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member]
Line of Credit Facility [Line Items]
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
Deferred costs, net	$ 20,700,000
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					$ 2,000,000,000.0
Outstanding balance	$ 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		$ 900,000,000.0
Interest Rate Swap [Member] | Credit Facility [Member] | VEREIT Operating Partnership, L.P. [Member] | Delayed-Draw Term Loan [Member]
Line of Credit Facility [Line Items]
Interest rate		3.84%