Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Net earned premiums	$ 142	$ 186	$ 423	$ 512
Net investment income	98	99	298	322
Net realized investment gains (losses):
Other-than-temporary impairment losses	(8)	(20)	(23)	(23)
Less: portion of other-than-temporary impairment loss recognized in other comprehensive income	1	(7)	(3)	6
Net impairment loss	(9)	(13)	(20)	(29)
Other net realized investment gains (losses)	2	20	6	83
Net realized investment gains (losses)	(7)	7	(14)	54
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements	1	(1)	4	19
Net unrealized gains (losses)	20	59	99	87
Net change in fair value of credit derivatives	21	58	103	106
Fair value gains (losses) on financial guaranty variable interest entities	5	3	11	25
Bargain purchase gain and settlement of pre-existing relationships	0	0	0	58
Commutation gains (losses)	1	255	(16)	328
Other income (loss)	14	15	(17)	53
Total revenues	274	623	788	1,458
Expenses
Loss and loss adjustment expenses	17	223	43	354
Amortization of deferred acquisition costs	3	5	12	13
Interest expense	23	24	71	73
Other operating expenses	56	58	183	183
Total expenses	99	310	309	623
Income (loss) before income taxes	175	313	479	835
Provision (benefit) for income taxes
Current	3	(148)	(28)	(102)
Deferred	11	253	74	259
Total provision (benefit) for income taxes	14	105	46	157
Net income (loss)	$ 161	$ 208	$ 433	$ 678
Earnings per share:
Basic (in dollars per share)	$ 1.48	$ 1.75	$ 3.87	$ 5.56
Diluted (in dollars per share)	$ 1.47	$ 1.72	$ 3.83	$ 5.48