Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income attributable to common shareholders	$ 2	$ 17
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	0	0
Net income (loss)	2	17
Adjustments to reconcile net income to net cash used in operating activities:
Amortization of bond premium and discount	(3)	(3)
Share-based compensation	5	4
Unearned premiums, net	(11)	(22)
Losses and loss expenses, net	(6)	(17)
Ceded premiums payable	7	(2)
Premium receivables	6	14
Accrued interest payable	24	23
Amortization of intangible assets	14	19
Net investment gains (losses), including impairments	(10)	(2)
Net realized gains (losses) on extinguishment of debt	0	(33)
Variable interest entity activities	(22)	0
Derivative assets and liabilities	(46)	(22)
Other, net	48	(16)
Net cash provided by (used in) operating activities	9	(40)
Cash flows from investing activities:
Proceeds from sales of bonds	141	44
Proceeds from matured bonds	20	39
Purchases of bonds	(33)	(128)
Proceeds from sales of other invested assets	45	48
Purchases of other invested assets	(25)	(41)
Change in short-term investments	(114)	94
Change in cash collateral receivable	54	11
Proceeds from paydowns of consolidated VIE assets	47	50
Other, net	0	(1)
Net cash provided by investing activities	136	116
Cash flows from financing activities:
Paydowns of LSNI Ambac Note	0	(16)
Tax payments related to shares withheld for share-based compensation plans	(3)	(6)
Payments of consolidated VIE liabilities	(49)	(48)
Net cash used in financing activities	(52)	(69)
Effect of foreign exchange on cash, cash equivalents and restricted cash	0	0
Net cash flow	93	6
Cash, cash equivalents, and restricted cash at beginning of period	23	35
Cash, cash equivalents, and restricted cash at end of period	$ 116	$ 42