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Contractual stairstep interest rate for the Seventeen to Twenty year period under the debt agreement.

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Contractual stairstep interest rate for the nine to twelve year period under the debt agreement.

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Unsecured short-term debt instrument issued by corporations which are highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Debt Obligations, net - Narrative (Details) $ in Millions		1 Months Ended									9 Months Ended	12 Months Ended
Debt Obligations, net - Narrative (Details) $ in Millions	Sep. 12, 2025	Jun. 30, 2026 USD ($)	Nov. 30, 2025 USD ($) Option	Nov. 30, 2024 USD ($)	Apr. 30, 2024 USD ($) Option	Feb. 29, 2024 USD ($)	May 31, 2022 USD ($)	Jan. 31, 2022 USD ($)	Nov. 30, 2021 USD ($)	May 31, 2021 USD ($)	Sep. 30, 2026 USD ($)	Dec. 31, 2025	Jun. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Covenant description secured recourse debt ratio maximum											50.00%
Secured Debt \| Mortgages
Line of Credit Facility [Line Items]
Weighted average interest rate											4.03%	4.03%
Unsecured Debt \| 2.80% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount										$ 400.0
Stated interest rate										2.80%	2.80%	2.80%
Percent of par value at which the notes were issued										99.127%
Percentage of principal amount of debt at which debt can be redeemed										100.00%
Unsecured Debt \| 2.85% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount									$ 350.0
Stated interest rate									2.85%		2.85%	2.85%
Percent of par value at which the notes were issued									99.123%
Percentage of principal amount of debt at which debt can be redeemed									100.00%
Unsecured Debt \| 6.10% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount						$ 300.0
Stated interest rate						6.10%					6.10%	6.10%
Percent of par value at which the notes were issued						98.957%
Percentage of principal amount of debt at which debt can be redeemed						100.00%
Unsecured Debt \| 5.65% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount				$ 400.0
Stated interest rate				5.65%							5.65%	5.65%
Percent of par value at which the notes were issued				98.812%
Percentage of principal amount of debt at which debt can be redeemed				100.00%
Unsecured Debt \| 3.98% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount								$ 475.0
Stated interest rate								3.98%			3.98%	3.98%
Minimum percentage of aggregate principal amount that can be repaid at any time at the Company's discretion								5.00%
Percentage of principal amount of debt at which debt can be redeemed								100.00%
Unsecured Debt \| 5.15% Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount							$ 150.0
Stated interest rate		5.15%					5.15%				5.15%	5.15%
Stairstep interest rate, Years 1 through 10							2.50%
Stairstep interest rate, Years 11 through 20							3.75%
Stairstep interest rate, Years 21 through 30							5.15%
Minimum percentage of aggregate principal amount that can be repaid at any time at the Company's discretion							5.00%
Percentage of principal amount of debt at which debt can be redeemed							100.00%
Unsecured Debt \| 6.615% senior notes
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 225.0
Stated interest rate		6.615%									6.615%	6.615%
Stairstep interest rate, Years 1 through 4		4.00%
Stairstep interest rate, Years 5 through 8		4.50%
Stairstep interest rate, Years 9 through 12		5.00%
Stairstep interest rate, Years 13 through 16		5.50%
Stairstep interest rate, Years 17 through 20		6.00%
Stairstep interest rate, Years 21 through 30		6.615%
Minimum percentage of aggregate principal amount that can be repaid at any time at the Company's discretion		5.00%
Percentage of principal amount of debt at which debt can be redeemed		100.00%
Unsecured Debt \| Trust Preferred Securities
Line of Credit Facility [Line Items]
Basis point spread on variable interest rate (percent)											1.50%	1.50%
Debt Instrument, Variable Interest Rate, Type											us-gaap:SecuredOvernightFinancingRateSofrMember
Unsecured Debt \| Commercial Paper Notes
Line of Credit Facility [Line Items]
Commercial paper notes available for issue													$ 750.0
Commercial paper notes outstanding balance											$ 0.0
Unsecured Debt \| 2021 Unsecured Revolver
Line of Credit Facility [Line Items]
Repayment of outstanding balance at termination					$ 916.0
Unsecured Debt \| 2024 Unsecured Revolver maturing in 2029
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 2,000.0
Number of extension options available \| Option					2
Debt extension term					6 months
Basis point spread on variable interest rate (percent)	0.85%										0.85%	0.85%
Debt Instrument, Variable Interest Rate, Type	us-gaap:SecuredOvernightFinancingRateSofrMember
Line of credit facility fee, percent					0.10%
Remaining borrowing capacity											$ 1,200.0
2025 Unsecured Term Loan
Line of Credit Facility [Line Items]
Number of extension options available \| Option			2
Debt extension term			1 year
Basis point spread on variable interest rate (percent)			0.90%								0.90%
Maximum increase in loan with accordion feature			$ 600.0
Aggregate principal amount			$ 400.0
Minimum \| Unsecured Debt \| Unsecured Senior Notes
Line of Credit Facility [Line Items]
Unencumbered assets to unsecured debt ratio											1.25
Minimum \| Unsecured Debt \| 2024 Unsecured Revolver maturing in 2029
Line of Credit Facility [Line Items]
Unencumbered assets to unsecured debt ratio											1.25
Debt instrument covenant multiple of minimum fixed charges on outstanding borrowings											1.15
Maximum \| Unsecured Debt \| 6.10% Senior Notes
Line of Credit Facility [Line Items]
Covenant description secured recourse debt ratio maximum											50.00%