Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities -Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Investments in Tax Credit and Other Investments, Net [Line Items]
Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits (in years)	15 years
Tax credit investments
Investments in Tax Credit and Other Investments, Net [Line Items]
Equity securities	$ 24.4	$ 24.0
Investments in Tax Credit and Other Investments and Other Assets
Investments in Tax Credit and Other Investments, Net [Line Items]
Equity securities without readily determinable fair values	$ 36.0	$ 36.5

Investments in Tax Credit and Other Investments, Net [Line Items]

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- Definition

Represents the minimum compliance period, to meet regulatory requirements for affordable housing, to fully utilize the tax credits.

+ References

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Topic 210
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Section 45
-Paragraph 1A
-Publisher FASB
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Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
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