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Derivative Financial Instruments - Cash Flow Hedges (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Cash Flow Hedges |  |
Maximum length of time hedging exposure to variability in future cash flows for forecasted transactions | 4 years 10 months 24 days |
Net losses reported in AOCI related to active hedges of forecasted transaction | $ 44.2 |
Amount of gain (loss) recognized in AOCI on derivatives in cash flow hedging relationships | (21.7) | $ 0.6
Net gains (losses) expected to be reclassified from accumulated OCI into net income in the next 12 months | 20.5 |
Interest rate contracts | Fixed maturities, available-for-sale |  |
Cash Flow Hedges |  |
Amount of gain (loss) recognized in AOCI on derivatives in cash flow hedging relationships | (44.2) |
Interest rate contracts | Investment contracts |  |
Cash Flow Hedges |  |
Amount of gain (loss) recognized in AOCI on derivatives in cash flow hedging relationships | 9.5 |
Foreign exchange contracts | Fixed maturities, available-for-sale |  |
Cash Flow Hedges |  |
Amount of gain (loss) recognized in AOCI on derivatives in cash flow hedging relationships | $ 13.0 | $ 0.6

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 + Details
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