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Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Derivative [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | $ 0.0 |
Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | 15.6 | $ 1.7
Fair Value Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0.4
Interest Rate Swap | Fair Value Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 0.0 | 5.0
Treasury Lock | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 202.5 | 0.0
Reverse Treasury Lock | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 0.0 | $ 100.0

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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480463/815-10-45-5 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
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