Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Premiums, fees and reimbursements received	$ 12	$ 14
Investment income received	66	91
Insured derivative commutations and losses paid	0	(1)
Financial guarantee losses and loss adjustment expenses paid	(115)	(115)
Proceeds from recoveries and reinsurance	27	91
Operating and employee related expenses paid	(46)	(44)
Interest paid, net of interest converted to principal	(47)	(91)
Income taxes (paid) received	14	(2)
Net cash provided (used) by operating activities	(89)	(57)
Cash flows from investing activities:
Purchases of available-for-sale investments	(574)	(1,410)
Sales of available-for-sale investments	569	1,367
Paydowns and maturities of available-for-sale investments	464	567
Purchases of investments at fair value	(85)	(104)
Sales, paydowns, maturities and other proceeds of investments at fair value	88	237
Sales, paydowns and maturities (purchases) of short-term investments, net	172	(72)
Sales, paydowns and maturities of held-to-maturity investments	315	0
Paydowns and maturities of loans receivable	7	64
Consolidation of variable interest entities	0	72
Deconsolidation of variable interest entities	0	(2)
(Payments) proceeds for derivative settlements	(7)	(15)
Collateral (to) from counterparties	(8)	(21)
Net cash provided (used) by investing activities	941	683
Cash flows from financing activities:
Proceeds from investment agreements	7	7
Principal paydowns of investment agreements	(20)	(13)
Principal paydowns of medium-term notes	0	(56)
Principal paydowns of variable interest entity notes	(327)	(301)
Purchases of treasury stock	(134)	(58)
Other financing	(7)	(7)
Net cash provided (used) by financing activities	(481)	(428)
Net increase (decrease) in cash and cash equivalents	371	198
Cash and cash equivalents - beginning of period	83	280
Cash and cash equivalents - end of period	454	478
Reconciliation of net income (loss) to net cash provided (used) by operating activities:
Net income (loss)	(439)	(228)
Change in:
Premiums receivable	10	34
Deferred acquisition costs	5	7
Unearned premium revenue	(38)	(67)
Loss and loss adjustment expense reserves	133	103
Insurance loss recoverable	151	(28)
Accrued interest payable	68	56
Accrued expenses	(12)	(3)
Net investment losses related to other-than-temporary impairments	0	37
Unrealized (gains) losses on insured derivatives	0	(14)
Net (gains) losses on financial instruments at fair value and foreign exchange	1	(32)
Other net realized (gains) losses	(14)	56
Deferred income tax provision (benefit)	13	0
Interest on variable interest entities, net	3	0
Other operating	30	22
Total adjustments to net income (loss)	350	171
Net cash provided (used) by operating activities	$ (89)	$ (57)