Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2023

Debt Instrument [Line Items]

Schedule of Maturities of Long-term Debt [Table Text Block]

Aggregated annual maturities of non-VIE long-term debt obligations (based on scheduled maturity dates as further discussed below) are as follows:

2024	$	519	(1)
2025	—
2026	—
2027	—
2028	—
Thereafter	41
Total	$	560

Schedule of Long-term Debt Instruments

Long-term debt outstanding, excluding VIE long-term debt, was as follows:

December 31,	2023						2022
	Par Value		Unamortized Discount		Carrying Value		Par Value		Unamortized Discount		Carrying Value
Ambac Assurance:
5.1% Surplus Notes	$	519	$	(28)	$	491	$	519	$	(42)	$	477
Tier 2 Notes	—		—		—		146		—		146
Ambac UK Debt	41		(24)		17		41		(25)		16
Long-term debt	$	560	$	(52)	$	508	$	706	$	(67)	$	639