Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Premiums, fees and reimbursements received	$ 2	$ 3
Investment income received	19	21
Financial guarantee losses and loss adjustment expenses paid	(336)	(58)
Proceeds from recoveries and reinsurance	622	17
Proceeds from loan repurchase commitments	0	600
Operating expenses paid and other operating	(22)	(32)
Interest paid, net of interest converted to principal	(12)	(22)
Net cash provided (used) by operating activities	273	529
Cash flows from investing activities:
Purchases of available-for-sale investments	(352)	(299)
Sales of available-for-sale investments	106	178
Paydowns and maturities of available-for-sale investments	65	96
Purchases of investments at fair value	(47)	(62)
Sales, paydowns, maturities and other proceeds of investments at fair value	44	59
Sales, paydowns and maturities (purchases) of short-term investments, net	(68)	(342)
Paydowns and maturities of loans receivable	2	5
(Payments) proceeds for derivative settlements	(4)	(53)
Net cash provided (used) by investing activities	(254)	(418)
Cash flows from financing activities:
Proceeds from investment agreements	2	0
Principal paydowns of investment agreements	(1)	0
Principal paydowns of variable interest entity notes	(11)	(156)
Principal paydowns of long-term debt	(17)	0
Purchases of treasury stock	(2)	(1)
Net cash provided (used) by financing activities	(29)	(157)
Effect of exchange rate changes on cash and cash equivalents	1	0
Net increase (decrease) in cash and cash equivalents	(9)	(46)
Cash and cash equivalents - beginning of period	160	167
Cash and cash equivalents - end of period	151	121
Reconciliation of net income (loss) to net cash provided (used) by operating activities:
Net income (loss)	(73)	(106)
Change in:
Accrued investment income	(5)	23
Unearned premium revenue	(15)	(19)
Loss and loss adjustment expense reserves	(13)	1
Insurance loss recoverable	392	55
Loan repurchase commitments	0	604
Accrued interest payable	24	25
Accrued expenses	(36)	(33)
Net realized investment gains (losses)	3	1
Net (gains) losses on financial instruments at fair value and foreign exchange	(13)	(42)
Other net realized (gains) losses	3	0
Other operating	6	20
Total adjustments to net income (loss)	346	635
Net cash provided (used) by operating activities	$ 273	$ 529