Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Income Tax Disclosure [Abstract]
Effective income tax rate	21.00%	8.00%	21.00%	13.00%
Deferred tax assets, valuation allowance	$ 67		$ 67		$ 38
Deferred tax assets	191		191		120
Valuation allowance, increase			29
LIHTC investments	$ 147		$ 147		$ 165
Investment, proportional amortization method, elected, statement of financial position flag	Prepaid expenses and other assets (certain assets held at fair value of $0 in 2026 and $24 in 2025)		Prepaid expenses and other assets (certain assets held at fair value of $0 in 2026 and $24 in 2025)		Prepaid expenses and other assets (certain assets held at fair value of $0 in 2026 and $24 in 2025)

Effective Income Tax Rate, Continuing Operations, Before Equity In Earnings (Losses) Of Unconsolidated Subsidiary

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- Definition

Amount of investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under program not meeting condition for accounting under proportional amortization method.

+ References

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Name Accounting Standards Codification
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- Definition

Indicates line item in statement of financial position that includes investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under tax credit program not meeting condition for accounting under proportional amortization method.

+ References

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-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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-SubTopic 10
-Name Accounting Standards Codification
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