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Schedule I - Condensed Financial Information of the Registrant - Promissory Notes (Details) - Parent Company - Reportable Legal Entities - USD ($) $ in Millions	Mar. 01, 2021	Jan. 01, 2021	Dec. 01, 2020	Dec. 01, 2019	Oct. 01, 2019
NOTES TO CONDENSED FINANCIAL STATEMENTS
Notes payable to subsidiary	$ 244.3	$ 289.0	$ 93.3	$ 67.4	$ 162.8
Stated interest rate (as a percent)	0.12%	0.14%	0.15%	1.61%	1.69%

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

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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