Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Net earned premiums	$ 102	$ 121	$ 205	$ 224
Net investment income	68	78	138	158
Asset management fees	21	20	45	43
Net realized investment gains (losses)	4	4	1	(1)
Net change in fair value of credit derivatives	(33)	100	(52)	23
Fair value gains (losses) on committed capital securities	(6)	(25)	(25)	23
Fair value gains (losses) on consolidated investment vehicles	21	31	37	19
Foreign exchange gains (losses) on remeasurement	5	2	5	(60)
Commutation gain (losses)	0	38	0	38
Other income (loss)	14	3	19	1
Total revenues	196	372	373	468
Expenses
Loss and loss adjustment expenses	(16)	37	14	57
Interest expense	23	21	44	43
Amortization of deferred acquisition costs	4	4	7	7
Employee compensation and benefit expenses	54	46	114	110
Other operating expenses	40	42	97	87
Total expenses	105	150	276	304
Income (loss) before income taxes and equity in earnings of investees	91	222	97	164
Equity in earnings of investees	34	0	43	(4)
Income (loss) before income taxes	125	222	140	160
Less: Provision (benefit) for income taxes	23	34	23	30
Net income (loss)	102	188	117	130
Less: Noncontrolling interests	4	5	8	2
Net income (loss) attributable to Assured Guaranty Ltd.	$ 98	$ 183	$ 109	$ 128
Earnings per share:
Basic (in dollars per share)	$ 1.31	$ 2.11	$ 1.44	$ 1.43
Diluted (in dollars per share)	$ 1.29	$ 2.10	$ 1.42	$ 1.42