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Other Comprehensive Income/Loss (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Schedule of Other Comprehensive Income and Related Tax Effects | The gross amounts of each component of other comprehensive income (loss) and the related tax effects are as follows:
| Pre-tax |  | Tax Expense (Benefit) |  | Net of Tax
Three Months Ended March 31, | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
Investment securities available-for sale: |  |  |  |  |  |  |  |  |  |  |
Change in net unrealized gains (losses) during the period | $ | 78.2 |  |  | $ | (252.6) |  |  | $ | 19.6 |  |  | $ | (62.7) |  |  | $ | 58.6 |  |  | $ | (189.9) |
Reclassification adjustment for net losses included in income | 23.4 |  |  | 0.1 |  |  | 5.8 |  |  | — |  |  | 17.6 |  |  | 0.1 |
Reclassification adjustment for securities transferred from held-to-maturity to available-for-sale | (7.2) |  |  | 0.2 |  |  | (1.8) |  |  | 0.1 |  |  | (5.4) |  |  | 0.1 |
Net change in unamortized losses on available-for-sale investment securities transferred into held-to-maturity | (0.4) |  |  | (23.0) |  |  | (0.1) |  |  | (5.7) |  |  | (0.3) |  |  | (17.3) |
Change in net unrealized loss on derivatives | 10.0 |  |  | 21.3 |  |  | 2.5 |  |  | 5.3 |  |  | 7.5 |  |  | 16.0 |
Total other comprehensive income (loss) | $ | 104.0 |  |  | $ | (254.0) |  |  | $ | 26.0 |  |  | $ | (63.0) |  |  | $ | 78.0 |  |  | $ | (191.0) |
Schedule of Accumulated Other Comprehensive Income (Loss) | The components of accumulated other comprehensive loss, net of related tax effects, are as follows:
| March 31, 2023 |  | December 31, 2022
Net unrealized loss on investment securities available-for-sale | $ | (400.2) |  |  | $ | (471.0) |
Net unrealized loss on investment securities transferred to held-to-maturity | (4.9) |  |  | (4.5) |
Net unrealized gain (loss) on derivatives | 6.0 |  |  | (1.6) |
Net accumulated other comprehensive loss | $ | (399.1) |  |  | $ | (477.1) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e526-108580 + Details
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