Insurance Contracts (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Insurance [Line Items]
Other adjustments (including foreign exchange)	$ 4	$ (12)	$ (4)

Amount of increase (decrease) in the premiums receivable on financial guarantee insurance contracts from adjustments classified as other.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)(4)(iv)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479584/944-310-50-3

Name:	us-gaap_FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration