Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income attributable to common shareholders	$ 347	$ 5
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(1)	(1)
Net income	348	6
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	1	1
Amortization of bond premium and discount	(8)	(9)
Share-based compensation	13	10
Unearned premiums, net	(47)	(75)
Losses and loss expenses, net	(328)	(148)
Ceded premiums payable	0	7
Premium receivables	57	44
Accrued interest payable	72	75
Amortization of intangible assets	34	44
Net investment gains (losses), including impairments	(31)	(4)
Net realized gains (losses) on extinguishment of debt	(57)	(33)
Variable interest entity activities	(14)	(5)
Derivative assets and liabilities	(62)	(23)
Other, net	83	(26)
Net cash provided by (used in) operating activities	59	(136)
Cash flows from investing activities:
Proceeds from sales of bonds	454	126
Proceeds from matured bonds	83	658
Purchases of bonds	(273)	(286)
Proceeds from sales of other invested assets	142	75
Purchases of other invested assets	(99)	(97)
Change in short-term investments	(58)	125
Change in cash collateral receivable	60	11
Proceeds from paydowns of consolidated VIE assets	126	134
Other, net	0	0
Net cash provided by investing activities	435	745
Cash flows from financing activities:
Paydowns of LSNI Ambac Note		(1,641)
Proceeds from Issuance of Debt	0	7
Tax payments related to shares withheld for share-based compensation plans	(4)	(6)
Proceeds from (Payments to) Noncontrolling Interests	1	(1)
Payments of Debt Issuance Costs	0	(12)
Payments of consolidated VIE liabilities	(404)	(133)
Net cash used in financing activities	(479)	(623)
Effect of foreign exchange on cash, cash equivalents and restricted cash	(1)	0
Net cash flow	14	(14)
Cash, cash equivalents, and restricted cash at beginning of period	23	35
Cash, cash equivalents, and restricted cash at end of period	38	22
Treasury Stock, Value, Acquired, Cost Method	(14)
Payment for Debt Extinguishment or Debt Prepayment Cost	$ (58)
Proceeds from Issuance of Debt		$ 1,163