Outstanding Exposure - Schedule of Non-Financial Guaranty Exposure (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Insured Financial Obligations [Line Items]
Gross Exposure	$ 3,800
Insurance securitizations
Schedule of Insured Financial Obligations [Line Items]
Gross Exposure	1,370	$ 1,314
Net Exposure	1,043	986
Aircraft residual value insurance policies
Schedule of Insured Financial Obligations [Line Items]
Gross Exposure	355	355
Net Exposure	200	200
Other guaranties
Schedule of Insured Financial Obligations [Line Items]
Gross Exposure	2,057	228
Net Exposure	2,057	$ 228
Maximum | Insurance securitizations
Schedule of Insured Financial Obligations [Line Items]
Net Exposure	$ 1,200