Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Net earned premiums	$ 102	$ 107	$ 307	$ 331
Net investment income	66	71	204	229
Asset management fees	20	17	65	60
Net realized investment gains (losses)	3	13	4	12
Fair value gains (losses) on credit derivatives	21	(3)	(31)	20
Fair value gains (losses) on committed capital securities	(3)	(10)	(28)	13
Fair value gains (losses) on financial guaranty variable interest entities	5	0	18	(8)
Fair value gains (losses) on consolidated investment vehicles	16	18	53	37
Foreign exchange gains (losses) on remeasurement	(27)	40	(22)	(20)
Commutation gain (losses)	0	0	0	38
Other income (loss)	9	15	15	24
Total revenues	212	268	585	736
Expenses
Loss and loss adjustment expenses (benefit)	(68)	73	(54)	130
Interest expense	23	21	67	64
Loss on extinguishment of debt	175	0	175	0
Amortization of deferred acquisition costs	3	4	10	11
Employee compensation and benefit expenses	59	57	173	167
Other operating expenses	38	41	135	128
Total expenses	230	196	506	500
Income (loss) before income taxes and equity in earnings of investees	(18)	72	79	236
Equity in earnings of investees	23	7	66	3
Income (loss) before income taxes	5	79	145	239
Less: Provision (benefit) for income taxes	(15)	(10)	8	20
Net income (loss)	20	89	137	219
Less: Noncontrolling interests	3	3	11	5
Net income (loss) attributable to Assured Guaranty Ltd.	$ 17	$ 86	$ 126	$ 214
Earnings per share:
Basic (in dollars per share)	$ 0.22	$ 1.03	$ 1.67	$ 2.45
Diluted (in dollars per share)	$ 0.22	$ 1.02	$ 1.66	$ 2.43