Equity - Common Stock and General Partner OP Units (Details) - shares	Sep. 30, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Common stock, shares authorized (shares)	1,500,000,000	1,500,000,000
Common stock, shares issued (shares)	1,091,242,138	1,076,845,984
Common stock, shares outstanding (shares)	1,091,242,138	1,076,845,984
VEREIT Operating Partnership, L.P. [Member] | Common Stock [Member]
Class of Stock [Line Items]
General partners', units outstanding (shares)	1,091,242,138	1,076,845,984
General partners', units issued (shares)	1,091,242,138	1,076,845,984
VEREIT Operating Partnership, L.P. [Member] | Common Stock [Member] | General Partner [Member]
Class of Stock [Line Items]
General partners', units outstanding (shares)	1,100,000,000
General partners', units issued (shares)	1,100,000,000