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Employment Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2023

Postemployment Benefits [Abstract]

Schedule of Expected Benefit Payments [Table Text Block]

The following table sets forth projected benefit payments from Ambac’s postretirement plan over the next ten years for current retirees:

2024						$	—
2025						—
2026						1
2027						1
2028						1
Thereafter						3
Total						$	6

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]

The amount of stock-based compensation expense and corresponding after-tax expense are as follows:

Year Ended December 31,			2023						2022						2021
Restricted stock units			$	5					$	5					$	5
Performance awards			12						12						10
Total stock-based compensation			$	17					$	17					$	14
Total stock-based compensation (after-tax)			$	17					$	17					$	11

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

A summary of RSU activity for 2023 is as follows:

			Shares						Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period			923,250						$	15.94
Granted			415,416						15.72
Delivered or returned to plan (1)			(300,164)						16.28
Forfeited			(2,163)						16.97
Outstanding at end of period			1,036,339						$	15.75

(1)    When restricted stock unit awards issued by Ambac become taxable compensation to employees, shares may be withheld to cover the employee’s withholding taxes. For the year ended December 31, 2023, Ambac withheld 49,870 shares from employees that settled restricted stock units to meet the required tax withholdings.

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

A summary of PSU activity for 2023 is as follows:

			Shares						Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period			918,951						$	15.67
Granted (1)			479,079						17.72
Delivered (2)			(525,212)						18.90
Forfeited			(1,289)						17.72
Performance adjustment (3)			147,542						19.50
Outstanding at end of period			1,019,071						$	15.52

(1)    Represents performance share units at 100% of units granted for LTIP Awards.

(2)    Reflects the number of performance shares attributable to the performance goals attained over the completed performance period and for which service conditions have been met. When performance stock unit awards issued by Ambac become taxable compensation to employees, shares may be withheld to cover the employee’s withholding taxes. For the year ended December 31,

2023, Ambac withheld 231,645 of shares from employees that settled performance based restricted stock units to meet the required tax withholdings.

(3)    Represents the number of additional shares issued for awards granted in 2020 as a result of actual performance during the performance period.

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Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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