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Fair Value Measurements (Narrative) (Details) - Senior Notes [Member] - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, long-term and short-term, combined carrying value	$ 104.9	$ 107.9
Long-term debt, current	6.1	6.1
Long-term debt, fair value	73.7	74.3
Long-term debt, face amount	$ 74.3	$ 74.3

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- Definition

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

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- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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