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Derivatives - Notional and Fair Value Amounts of Derivative Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative |  |
Notional Amount | $ 305.7 | $ 287.1
Fair Value | 10.7 | 16.8
Bank of America, N.A. |  |
Derivative |  |
Notional Amount | 193.0 | 205.2
Fair Value | 6.3 | 14.0
Barclays Bank PLC |  |
Derivative |  |
Notional Amount | 98.7 | 81.9
Fair Value | 4.1 | 2.8
Citigroup Inc. |  |
Derivative |  |
Notional Amount | 0.0 | 0.0
Fair Value | 0.0 | 0.0
Credit Suisse International |  |
Derivative |  |
Notional Amount | 14.0 | 0.0
Fair Value | 0.3 | 0.0
Societe Generale |  |
Derivative |  |
Notional Amount | 0.0 | 0.0
Fair Value | $ 0.0 | $ 0.0

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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