Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Net earned premiums	$ 414	$ 485	$ 476
Net investment income	269	297	378
Asset management fees	88	89	22
Net realized investment gains (losses)	15	18	22
Fair value gains (losses) on credit derivatives	(58)	81	(6)
Fair value gains (losses) on committed capital securities	(28)	(1)	(22)
Fair value gains (losses) on financial guaranty variable interest entities	23	(10)	42
Fair value gains (losses) on consolidated investment vehicles	127	41	(3)
Foreign exchange gains (losses) on remeasurement	(23)	39	24
Commutation gains (losses)	0	38	1
Other income (loss)	21	38	29
Total revenues	848	1,115	963
Expenses
Loss and loss adjustment expenses (benefit)	(220)	203	93
Interest expense	87	85	89
Loss on extinguishment of debt	175	0	0
Amortization of deferred acquisition costs	14	16	18
Employee compensation and benefit expenses	230	228	178
Other operating expenses	179	197	125
Total expenses	465	729	503
Income (loss) before income taxes and equity in earnings of investees	383	386	460
Equity in earnings of investees	94	27	4
Income (loss) before income taxes	477	413	464
Provision (benefit) for income taxes
Current	96	(13)	(2)
Deferred	(38)	58	65
Total provision (benefit) for income taxes	58	45	63
Net income (loss)	419	368	401
Less: Noncontrolling interests	30	6	(1)
Net income (loss) attributable to Assured Guaranty Ltd.	$ 389	$ 362	$ 402
Earnings per share:
Basic (in dollars per share)	$ 5.29	$ 4.22	$ 4.04
Diluted (in dollars per share)	$ 5.23	$ 4.19	$ 4.00