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Total issuance of unsecured senior notes

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Unsecured senior notes payable, LOC, and commercial paper (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 29, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 22, 2022
Debt Instrument
Principal		$ 12,305,509
Debt Balance at 100%		12,217,163
Commercial Paper
Debt Instrument
Principal		0
Commercial paper, maximum issuance		$ 2,500,000
Weighted-average yield to maturity, commercial paper		5.60%
Weighted-average remaining maturity term, commercial paper		15 days
Commercial Paper \| Minimum
Debt Instrument
Debt Instrument, Term		30 days
Commercial Paper \| Maximum
Debt Instrument
Debt Instrument, Term		397 days
Total issuance of unsecured senior notes in Feb 2024
Debt Instrument
Total issuance of unsecured senior notes	$ 1,000,000
Weighted Average Interest Rate	5.48%
Weighted average maturity years	23 years 1 month 6 days
5.25% Unsecured Senior Notes Payable
Debt Instrument
Principal	$ 400,000	$ 400,000
Stated interest rate (as a percent)	5.25%	5.25%
Debt Balance at 100%		$ 395,636
5.625% Unsecured Senior Notes Payable
Debt Instrument
Principal	$ 600,000	$ 600,000
Stated interest rate (as a percent)	5.625%	5.625%
Debt Balance at 100%		$ 593,143
Unsecured senior line of credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity		$ 5,000,000
Annual facility fee (as a percent)		0.145%		0.15%
Interest rate adjustment amount, maximum					0.04%
Facility fee rate adjustment amount, maximum					0.01%
Interest rate adjustment amount, decrease			0.02%
Facility fee rate adjustment amount, decrease			0.005%
Debt Balance at 100%		$ 0
Unsecured senior line of credit \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument
Applicable margin (as a percent)		0.855%		0.875%
Unsecured senior line of credit \| Commercial Paper
Debt Instrument
Principal		$ 0
Debt Balance at 100%		$ 0