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Notes and Contracts Payable (Narrative) (Detail) - 2.400% Unsecured Notes $ in Millions	1 Months Ended
	Jul. 31, 2021 USD ($)
Debt Instrument [Line Items]
Senior unsecured notes	$ 650.0
Debt instrument stated interest rate	2.40%
Debt instrument maturity date	Aug. 15, 2031
Interest due, periodic	semi-annually
Due date of interest to be paid semi-annually, beginning	Feb. 15, 2022

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- Definition

Date the debt agreement requires the first payment to be made, in YYYY-MM-DD format.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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