Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Investment portfolio:
Fixed-maturity securities, available-for-sale, at fair value (amortized cost of $8,267 and $8,204, allowance for credit loss of $81 and $78)	$ 8,687	$ 8,773
Short-term investments at fair value	701	851
Other invested assets (includes $92 and $106 measured at fair value)	211	214
Total investment portfolio	9,599	9,838
Cash	95	162
Premiums receivable, net of commissions payable	1,359	1,372
Deferred acquisition costs	124	119
Salvage and subrogation recoverable	977	991
Financial guaranty variable interest entities’ assets, at fair value	281	296
Assets of consolidated investment vehicles (includes $2,594 and $1,727 measured at fair value)	2,956	1,913
Goodwill and other intangible assets	184	203
Other assets (includes $134 and $145 measured at fair value)	443	440
Total assets	16,018	15,334
Liabilities and shareholders’ equity
Unearned premium reserve	3,718	3,735
Loss and loss adjustment expense reserve	1,058	1,088
Long-term debt	1,225	1,224
Credit derivative liabilities, at fair value	124	103
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	301	316
Financial guaranty variable interest entities’ liabilities without recourse, at fair value	17	17
Liabilities of consolidated investment vehicles (includes $2,096 and $1,299 measured at fair value)	2,573	1,590
Other liabilities	509	556
Total liabilities	9,525	8,629
Commitments and contingencies (see Note 13)
Redeemable noncontrolling interests (see Note 9)	21	21
Common shares ($0.01 par value, 500,000,000 shares authorized; 75,935,382 and 77,546,896 shares issued and outstanding)	1	1
Retained earnings	6,055	6,143
Accumulated other comprehensive income, net of tax of $68 and $89	373	498
Deferred equity compensation	1	1
Total shareholders’ equity attributable to Assured Guaranty Ltd.	6,430	6,643
Nonredeemable noncontrolling interests (see Note 9)	42	41
Total shareholders’ equity	6,472	6,684
Total liabilities, redeemable noncontrolling interests and shareholders’ equity	$ 16,018	$ 15,334