Condensed Consolidated Statements Of Equity (Unaudited) - USD ($)	Total	Total  Stockholders’ Equity of NNN	Common Stock	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balances at Dec. 31, 2021	$ 3,901,663,000	$ 3,901,662,000	$ 1,757,000	$ 4,662,714,000	$ (747,853,000)	$ (14,956,000)	$ 1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	243,959,000	243,964,000			243,964,000		(5,000)
Dividends declared and paid:
Common stock dividends declared and paid	(280,579,000)	(280,579,000)		2,058,000	(282,637,000)
Issuance of common stock:
Director compensation	927,000	927,000		927,000
Stock purchase plan	200,000	200,000		200,000
ATM equity program	129,149,000	129,149,000	28,000	129,121,000
Restricted shares, net of forfeitures			3,000	(3,000)
Stock issuance costs	(1,879,000)	(1,879,000)		(1,879,000)
Amortization of deferred compensation	12,000,000	12,000,000		12,000,000
Amortization of interest rate hedges	1,770,000	1,770,000				1,770,000
Distributions to noncontrolling interests	(278,000)						(278,000)
Other		(282,000)		(282,000)			282,000
Balances at Sep. 30, 2022	4,006,932,000	4,006,932,000	1,788,000	4,804,856,000	(786,526,000)	(13,186,000)	0
Balances at Jun. 30, 2022	3,915,526,000	3,915,526,000	1,767,000	4,705,479,000	(777,939,000)	(13,781,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	88,421,000	88,421,000			88,421,000
Dividends declared and paid:
Common stock dividends declared and paid	(96,293,000)	(96,293,000)		715,000	(97,008,000)
Issuance of common stock:
Director compensation	318,000	318,000		318,000
Stock purchase plan	88,000	88,000		88,000
ATM equity program	97,556,000	97,556,000	21,000	97,535,000
Stock issuance costs	(1,304,000)	(1,304,000)		(1,304,000)
Amortization of deferred compensation	2,025,000	2,025,000		2,025,000
Amortization of interest rate hedges	595,000	595,000				595,000
Balances at Sep. 30, 2022	4,006,932,000	4,006,932,000	1,788,000	4,804,856,000	(786,526,000)	(13,186,000)	$ 0
Balances at Dec. 31, 2022	4,123,502,000	4,123,502,000	1,815,000	4,928,034,000	(793,765,000)	(12,582,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	295,658,000	295,658,000			295,658,000
Dividends declared and paid:
Common stock dividends declared and paid	(299,638,000)	(299,638,000)		2,155,000	(301,793,000)
Issuance of common stock:
Director compensation	833,000	833,000		833,000
Stock purchase plan	222,000	222,000		222,000
ATM equity program	29,150,000	29,150,000	7,000	29,143,000
Restricted shares, net of forfeitures			3,000	(3,000)
Stock issuance costs	(933,000)	(933,000)		(933,000)
Amortization of deferred compensation	7,421,000	7,421,000		7,421,000
Amortization of interest rate hedges	1,843,000	1,843,000				1,843,000
Balances at Sep. 30, 2023	4,158,058,000	4,158,058,000	1,825,000	4,966,872,000	(799,900,000)	(10,739,000)
Balances at Jun. 30, 2023	4,150,234,000	4,150,234,000	1,825,000	4,963,808,000	(804,040,000)	(11,359,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	106,787,000	106,787,000			106,787,000
Dividends declared and paid:
Common stock dividends declared and paid	(101,947,000)	(101,947,000)		700,000	(102,647,000)
Issuance of common stock:
Director compensation	294,000	294,000		294,000
Stock purchase plan	62,000	62,000		62,000
Stock issuance costs	(375,000)	(375,000)		(375,000)
Amortization of deferred compensation	2,383,000	2,383,000		2,383,000
Amortization of interest rate hedges	620,000	620,000				620,000
Balances at Sep. 30, 2023	$ 4,158,058,000	$ 4,158,058,000	$ 1,825,000	$ 4,966,872,000	$ (799,900,000)	$ (10,739,000)