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Investments (Tables)

3 Months Ended

Mar. 31, 2025

Investments [Abstract]

Net Realized Capital Gains (Losses)

Net Realized Gains (Losses)
									Three Months Ended March 31,
(Before tax)												2025			2024
Gross gains on sales of fixed maturities												$	13		$	5
Gross losses on sales of fixed maturities												(25)			(11)
Equity securities [1]
Net realized gains (losses) on sales of equity securities												—			(12)
Change in net unrealized gains (losses) of equity securities												(11)			47
Net realized and unrealized gains (losses) on equity securities												(11)			35
Net credit losses on fixed maturities, AFS												2			(1)
Change in ACL on mortgage loans												—			3
Other, net [2]												(28)			(3)
Net realized gains (losses)												$	(49)		$	28

[1]The change in net unrealized gains (losses) on equity securities still held as of the end of the period and included in net realized gains (losses) were $(11) and $36 for the three months ended March 31, 2025, and 2024, respectively.

[2] The three months ended March 31, 2025, and 2024 includes gains (losses) from transactional foreign currency revaluation of $(10) and $2, respectively, and gains (losses) on non-qualifying derivatives of $0 and $(2), respectively.

Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block]

ACL on Fixed Maturities, AFS by Type
									Three Months Ended March 31,
															2025												2024
(Before tax)																								Corporate						CMBS			Total						Corporate						CMBS			Total
Balance as of beginning of period																								$	3					$	13		$	16					$	9					$	12		$	21
Net increases (decreases) on fixed maturities where an allowance was previously recorded																								(3)						1			(2)						1						—			1
Write-offs charged against the allowance																								—						—			—						(4)						—			(4)
Balance as of end of period																								$	—					$	14		$	14					$	6					$	12		$	18

Schedule of Available-for-sale Securities

Fixed Maturities, AFS, by Type
			March 31, 2025																		December 31, 2024
			Amortized Cost			ACL			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value									Amortized Cost			ACL			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
ABS			$	4,317		$	—		$	40		$	(24)		$	4,333								$	3,948		$	—		$	28		$	(39)		$	3,937
CLOs			3,392			—			6			(2)			3,396									3,237			—			13			—			3,250
CMBS			2,946			(14)			26			(204)			2,754									2,976			(13)			21			(248)			2,736
Corporate			22,329			—			179			(862)			21,646									21,555			(3)			117			(1,033)			20,636
Foreign govt./govt. agencies			492			—			6			(17)			481									500			—			3			(23)			480
Municipal			5,340			—			61			(371)			5,030									5,574			—			77			(347)			5,304
RMBS			5,855			—			28			(325)			5,558									5,610			—			13			(393)			5,230
U.S. Treasuries			1,119			—			5			(118)			1,006									1,138			—			—			(144)			994
Total fixed maturities, AFS			$	45,790		$	(14)		$	351		$	(1,923)		$	44,204								$	44,538		$	(16)		$	272		$	(2,227)		$	42,567

Investments by Contractual Maturity Year

Fixed Maturities, AFS, by Contractual Maturity Year
			March 31, 2025									December 31, 2024
			Amortized Cost			Fair Value						Amortized Cost			Fair Value
One year or less			$	1,547		$	1,543					$	1,308		$	1,298
Over one year through five years			9,550			9,476						9,564			9,414
Over five years through ten years			8,392			8,137						7,687			7,334
Over ten years			9,791			9,007						10,208			9,368
Subtotal			29,280			28,163						28,767			27,414
Mortgage-backed and asset-backed securities			16,510			16,041						15,771			15,153
Total fixed maturities, AFS			$	45,790		$	44,204					$	44,538		$	42,567

Unrealized Gain (Loss) on Investments [Table Text Block]

Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of March 31, 2025
						Less Than 12 Months												12 Months or More												Total
						Fair Value			Unrealized Losses									Fair Value			Unrealized Losses									Fair Value			Unrealized Losses
ABS						$	567		$	(6)								$	306		$	(18)								$	873		$	(24)
CLOs						900			(2)									—			—									900			(2)
CMBS						146			(4)									2,261			(200)									2,407			(204)
Corporate						5,022			(85)									8,023			(777)									13,045			(862)
Foreign govt./govt. agencies						109			(2)									164			(15)									273			(17)
Municipal						1,291			(33)									2,580			(338)									3,871			(371)
RMBS						951			(13)									2,635			(312)									3,586			(325)
U.S. Treasuries						35			(2)									599			(116)									634			(118)
Total fixed maturities, AFS in an unrealized loss position						$	9,021		$	(147)								$	16,568		$	(1,776)								$	25,589		$	(1,923)

Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of December 31, 2024
						Less Than 12 Months												12 Months or More												Total
						Fair Value			Unrealized Losses									Fair Value			Unrealized Losses									Fair Value			Unrealized Losses
ABS						$	1,088		$	(14)								$	407		$	(25)								$	1,495		$	(39)
CLOs						78			—									—			—									78			—
CMBS						228			(4)									2,299			(244)									2,527			(248)
Corporate						5,883			(138)									8,212			(895)									14,095			(1,033)
Foreign govt./govt. agencies						165			(5)									178			(18)									343			(23)
Municipal						1,263			(27)									2,712			(320)									3,975			(347)
RMBS						1,297			(29)									2,672			(364)									3,969			(393)
U.S. Treasuries						406			(26)									461			(118)									867			(144)
Total fixed maturities, AFS in an unrealized loss position						$	10,408		$	(243)								$	16,941		$	(1,984)								$	27,349		$	(2,227)

Financing Receivable, Allowance for Credit Loss [Table Text Block]

ACL on Mortgage Loans
									Three Months Ended March 31,
												2025			2024
ACL as of beginning of period												$	44		$	51
Current period provision (release)												—			(3)
Current period gross write-offs												(1)			—
ACL as of March 31,												$	43		$	48

Loans Credit Quality

Mortgage Loans LTV & DSCR by Origination Year as of March 31, 2025
			2025						2024						2023						2022						2021						2020 & Prior						Total
Loan-to-value			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost [1]			Avg. DSCR
Greater than 80%			$	—		—x			$	26		0.58x			$	—		—x			$	16		1.07x			$	37		1.00x			$	109		1.67x			$	188		1.33x
65% - 80%			—			—x			88			1.31x			7			1.11x			157			2.05x			421			2.54x			538			2.37x			1,211			2.30x
Less than 65%			75			2.75x			390			1.61x			503			1.42x			687			2.86x			1,110			2.93x			2,235			2.69x			5,000			2.56x
Total mortgage loans			$	75		2.75x			$	504		1.50x			$	510		1.41x			$	860		2.68x			$	1,568		2.78x			$	2,882		2.59x			$	6,399		2.47x

[1]Amortized cost of mortgage loans excludes ACL of $43.

Mortgage Loans LTV & DSCR by Origination Year as of December 31, 2024
			2024						2023						2022						2021						2020						2019 & Prior						Total
Loan-to-value			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost			Avg. DSCR			Amortized Cost [1]			Avg. DSCR
Greater than 80%			$	25		0.63x			$	—		—x			$	16		1.05x			$	37		1.03x			$	—		—x			$	110		1.68x			$	188		1.34x
65% - 80%			89			1.42x			7			1.35x			204			1.89x			421			2.55x			100			3.60x			439			2.01x			1,260			2.26x
Less than 65%			357			1.62x			489			1.39x			696			2.85x			1,108			2.93x			518			2.67x			1,824			2.71x			4,992			2.57x
Total mortgage loans			$	471		1.52x			$	496		1.39x			$	916		2.61x			$	1,566		2.79x			$	618		2.82x			$	2,373		2.53x			$	6,440		2.47x

[1]Amortized cost of mortgage loans excludes ACL of $44.

Mortgage Loans by Region
			March 31, 2025									December 31, 2024
			Amortized Cost			Percent of Total						Amortized Cost			Percent of Total
East North Central			$	364		5.7		%				$	362		5.6		%
Middle Atlantic			259			4.1		%				259			4.0		%
Mountain			770			12.0		%				764			11.9		%
New England			381			6.0		%				356			5.5		%
Pacific			1,403			21.9		%				1,400			21.8		%
South Atlantic			1,775			27.7		%				1,821			28.3		%
West North Central			97			1.5		%				97			1.5		%
West South Central			662			10.3		%				588			9.1		%
Other [1]			688			10.8		%				793			12.3		%
Total mortgage loans			6,399			100.0		%				6,440			100.0		%
ACL			(43)									(44)
Total mortgage loans, net of ACL			$	6,356								$	6,396

[1]Primarily represents loans collateralized by multiple properties in various regions.

Mortgage Loans by Property Type
			March 31, 2025									December 31, 2024
			Amortized Cost			Percent of Total						Amortized Cost			Percent of Total
Commercial
Industrial			$	2,724		42.6		%				$	2,737		42.5		%
Multifamily			2,141			33.4		%				2,161			33.5		%
Office			503			7.9		%				507			7.9		%
Retail [1]			953			14.9		%				957			14.9		%
Single Family			78			1.2		%				78			1.2		%
Total mortgage loans			6,399			100.0		%				6,440			100.0		%
ACL			(43)									(44)
Total mortgage loans, net of ACL			$	6,356								$	6,396

[1]Primarily comprised of grocery-anchored retail centers, with no exposure to regional shopping malls.

Schedule of Financial Instruments Owned and Pledged as Collateral

			March 31, 2025			December 31, 2024
			Fair Value			Fair Value
Securities on deposit with government agencies			$	2,500		$	2,362
Fixed maturities in trust for benefit of Lloyd's Syndicate policyholders			1,062			1,056
Short-term investments in trust for benefit of Lloyd's Syndicate policyholders			37			25
Other investments			70			61
Total Other Restricted Investments			$	3,669		$	3,504

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