Term Loans (Details) € in Millions, £ in Millions, $ in Millions	1 Months Ended
	Jan. 31, 2024 USD ($)	Jan. 31, 2023 extension	Mar. 31, 2024 USD ($)	Mar. 31, 2024 GBP (£)	Mar. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)
Spirit Realty Capital, Inc. | Interest rate swaps
Debt
Weighted average interest rate (as a percent)	3.90%
Term loan, net | Spirit Realty Capital, Inc.
Debt
Face amount of loan	$ 800.0
Term loan, net | Revolving credit facility | Spirit Realty Capital, Inc.
Debt
Maximum borrowing capacity	800.0
Term Loan Agreement One | Revolving credit facility | Spirit Realty Capital, Inc.
Debt
Current borrowing capacity	300.0
Term Loan Agreement Two | Spirit Realty Capital, Inc.
Debt
Face amount of loan	500.0
Term Loan Agreement Two | Revolving credit facility | Spirit Realty Capital, Inc.
Debt
Maximum borrowing capacity	500.0
Multicurrency Unsecured Debt | Unsecured Debt Maturing In January 2024
Debt
Face amount of loan			$ 1,100.0		€ 85.0
Maximum amount of loan	$ 1,500.0
Number of extension options | extension		1
Length of extension option		12 months
Borrowing rate over applicable benchmark rate (in basis points) | extension		80
Stated interest rate (as a percent)			4.90%	4.90%	4.90%
Multicurrency Unsecured Debt | Unsecured Debt Maturing In January 2024 | Term loan, net
Debt
Face amount of loan			$ 90.0	£ 705.0
Senior Unsecured Term Loans
Debt
Deferred finance costs balance			$ 2.5			$ 0.1