Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Net earned premiums	$ 494	$ 414	$ 485
Net investment income	269	269	297
Asset management fees	93	88	89
Net realized investment gains (losses)	(56)	15	18
Fair value gains (losses) on credit derivatives	(11)	(58)	81
Fair value gains (losses) on committed capital securities	24	(28)	(1)
Fair value gains (losses) on financial guaranty variable interest entities	22	23	(10)
Fair value gains (losses) on consolidated investment vehicles	17	127	41
Foreign exchange gains (losses) on remeasurement	(112)	(23)	39
Fair value gains (losses) on trading securities	(34)	0	0
Commutation gains (losses)	2	0	38
Other income (loss)	15	21	38
Total revenues	723	848	1,115
Expenses
Loss and loss adjustment expenses (benefit)	16	(220)	203
Interest expense	81	87	85
Loss on extinguishment of debt	0	175	0
Amortization of deferred acquisition costs	14	14	16
Employee compensation and benefit expenses	258	230	228
Other operating expenses	167	179	197
Total expenses	536	465	729
Income (loss) before income taxes and equity in earnings (losses) of investees	187	383	386
Equity in earnings (losses) of investees	(39)	94	27
Income (loss) before income taxes	148	477	413
Provision (benefit) for income taxes
Current	14	96	(13)
Deferred	(3)	(38)	58
Total provision (benefit) for income taxes	11	58	45
Net income (loss)	137	419	368
Less: Noncontrolling interests	13	30	6
Net income (loss) attributable to Assured Guaranty Ltd.	$ 124	$ 389	$ 362
Earnings per share:
Basic (in dollars per share)	$ 1.95	$ 5.29	$ 4.22
Diluted (in dollars per share)	$ 1.92	$ 5.23	$ 4.19