Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Net earned premiums	$ 344	$ 494	$ 414
Net investment income	365	269	269
Asset management fees	53	93	88
Net realized investment gains (losses)	(14)	(56)	15
Fair value gains (losses) on credit derivatives	114	(11)	(58)
Fair value gains (losses) on committed capital securities	(35)	24	(28)
Fair value gains (losses) on financial guaranty variable interest entities	8	22	23
Fair value gains (losses) on consolidated investment vehicles	88	17	127
Foreign exchange gains (losses) on remeasurement	53	(112)	(23)
Fair value gains (losses) on trading securities	74	(34)	0
Gain on sale of asset management subsidiaries	262	0	0
Other income (loss)	61	17	21
Total revenues	1,373	723	848
Expenses
Loss and loss adjustment expenses (benefit)	162	16	(220)
Interest expense	90	81	87
Loss on extinguishment of debt	0	0	175
Amortization of deferred acquisition costs (DAC)	13	14	14
Employee compensation and benefit expenses	251	258	230
Other operating expenses	217	167	179
Total expenses	733	536	465
Income (loss) before income taxes and equity in earnings (losses) of investees	640	187	383
Equity in earnings (losses) of investees	28	(39)	94
Income (loss) before income taxes	668	148	477
Provision (benefit) for income taxes
Current	63	14	96
Deferred	(156)	(3)	(38)
Total provision (benefit) for income taxes	(93)	11	58
Net income (loss)	761	137	419
Less: Noncontrolling interests	22	13	30
Net income (loss) attributable to Assured Guaranty Ltd.	$ 739	$ 124	$ 389
Earnings per share:
Basic (in dollars per share)	$ 12.54	$ 1.95	$ 5.29
Diluted (in dollars per share)	$ 12.30	$ 1.92	$ 5.23