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Investments (Tables)

12 Months Ended

Dec. 31, 2023

Investments [Abstract]

Debt Securities, Available-for-sale

The following tables provide information relating to investments in fixed maturity securities by type as of December 31, 2023 and 2022 (dollars in millions):

December 31, 2023:						Amortized Cost						Allowance for Credit Losses						Unrealized Gains						Unrealized Losses						Estimated Fair Value						% of Total
Available-for-sale:
Corporate						$	42,014					$	62					$	554					$	3,751					$	38,755					64.1		%
Canadian government						3,477						—						473						33						3,917						6.5
Japanese government						3,630						—						3						502						3,131						5.2
ABS						4,661						12						19						239						4,429						7.3
CMBS						1,969						1						7						202						1,773						2.9
RMBS						1,173						—						8						102						1,079						1.8
U.S. government						2,725						—						9						214						2,520						4.2
State and political subdivisions						1,236						—						7						129						1,114						1.8
Other foreign government						4,092						—						45						388						3,749						6.2
Total fixed maturity securities						$	64,977					$	75					$	1,125					$	5,560					$	60,467					100.0		%

December 31, 2022:						Amortized Cost						Allowance for Credit Losses						Unrealized Gains						Unrealized Losses						Estimated Fair Value						% of Total
Available-for-sale:
Corporate						$	38,963					$	27					$	168					$	5,135					$	33,969					64.2		%
Canadian government						3,311						—						381						66						3,626						6.9
Japanese government						3,033						—						4						478						2,559						4.8
ABS						4,324						10						4						440						3,878						7.3
CMBS						1,835						—						—						212						1,623						3.1
RMBS						1,054						—						1						114						941						1.8
U.S. government						1,690						—						4						212						1,482						2.8
State and political subdivisions						1,282						—						10						173						1,119						2.1
Other foreign government						4,171						—						22						489						3,704						7.0
Total fixed maturity securities						$	59,663					$	37					$	594					$	7,319					$	52,901					100.0		%

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of December 31, 2023 and 2022 (dollars in millions):

			2023												2022
			Amortized Cost						Estimated Fair Value						Amortized Cost						Estimated Fair Value
Fixed maturity securities pledged as collateral			$	572					$	517					$	355					$	292
Fixed maturity securities received as collateral			n/a						1,827						n/a						1,428
Assets in trust held to satisfy collateral requirements			32,758						30,359						31,510						27,817

Concentration Risk Disclosure [Text Block]

The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s equity included securities of the U.S. government and its agencies and the Japanese government and its agencies, as well as the securities disclosed below, as of December 31, 2023 and 2022 (dollars in millions):

			2023												2022
			Amortized Cost						Estimated Fair Value						Amortized Cost						Estimated Fair Value
Fixed maturity securities guaranteed or issued by:
Canadian province of Quebec			$	1,467					$	1,748					$	1,436					$	1,649
Canadian province of Ontario			1,019						1,125						982						1,068

Investments Classified By Contractual Maturity Date [Table Text Block]

The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale as of December 31, 2023, are shown by contractual maturity in the table below (dollars in millions). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Structured securities are shown separately in the table below as they are not due at a single maturity date.

						Amortized Cost						Estimated Fair Value
Available-for-sale:
Due in one year or less						$	1,587					$	1,595
Due after one year through five years						11,517						11,294
Due after five years through ten years						11,224						10,637
Due after ten years						32,846						29,660
Structured securities						7,803						7,281
Total						$	64,977					$	60,467

Fixed Maturity Holdings Industry Types [Table Text Block]

The tables below show the major sectors of the Company’s corporate fixed maturity holdings as of December 31, 2023 and 2022 (dollars in millions):

December 31, 2023:						Amortized Cost						Estimated Fair Value						% of Total
Finance						$	15,052					$	13,789					35.6		%
Industrial						21,413						19,935						51.4
Utility						5,549						5,031						13.0
Total						$	42,014					$	38,755					100.0		%
December 31, 2022:						Amortized Cost						Estimated Fair Value						% of Total
Finance						$	14,551					$	12,680					37.3		%
Industrial						19,624						17,257						50.8
Utility						4,788						4,032						11.9
Total						$	38,963					$	33,969					100.0		%

Roll Forward Of Cumulative Credit Loss Component Of Otti Income Loss [Table Text Block]

The following tables present the rollforward of the allowance for credit losses in fixed maturity securities by type for the years ended December 31, 2023 and 2022 (dollars in millions):

						Corporate						ABS						CMBS						Other Foreign Government						Total
Year ended December 31, 2023:
Balance, beginning of period						$	27					$	10					$	—					$	—					$	37
Credit losses recognized on securities for which credit losses were not previously recorded						51						—						1						—						52
Reductions for securities sold during the period						(10)						—						—						—						(10)
Reductions for securities the Company intends to sell or more likely than not will be required to sell before recovery of its amortized cost						—						—						—						—						—
Additional increases or decreases for credit losses on securities that had an allowance recorded in a previous period						—						2						—						—						2
Write-offs charged against the allowance						(6)						—						—						—						(6)
Balance, end of period						$	62					$	12					$	1					$	—					$	75

						Corporate						ABS						CMBS						Other Foreign Government						Total
Year ended December 31, 2022:
Balance, beginning of period						$	26					$	—					$	1					$	4					$	31
Credit losses recognized on securities for which credit losses were not previously recorded						31						10						—						1						42
Reductions for securities sold during the period						(32)						—						—						(7)						(39)
Reductions for securities the Company intends to sell or more likely than not will be required to sell before recovery of its amortized cost						(4)						—						—						—						(4)
Additional increases or decreases for credit losses on securities that had an allowance recorded in a previous period						6						—						(1)						2						7
Write-offs charged against the allowance						—						—						—						—						—
Balance, end of period						$	27					$	10					$	—					$	—					$	37

Fair Value And Investments In Debt And Equity Securities Disclosures [Table Text Block]

The following tables present the estimated fair value and gross unrealized losses for the 5,788 and 6,441 fixed maturity securities for which an allowance for credit loss has not been recorded as of December 31, 2023 and December 31, 2022, and the estimated fair value had declined and remained below amortized cost (dollars in millions). These investments are presented by class and grade of security, as well as the length of time the related fair value has continuously remained below amortized cost.

						Less than 12 months												12 months or greater												Total
December 31, 2023:						Estimated Fair Value						Gross Unrealized Losses						Estimated Fair Value						Gross Unrealized Losses						Estimated Fair Value						Gross Unrealized Losses
Investment grade securities:
Corporate						$	2,134					$	70					$	24,207					$	3,524					$	26,341					$	3,594
Canadian government						—						—						459						33						459						33
Japanese government						876						50						2,193						452						3,069						502
ABS						336						5						3,025						223						3,361						228
CMBS						160						5						1,328						190						1,488						195
RMBS						115						3						681						99						796						102
U.S. government						614						10						717						204						1,331						214
State and political subdivisions						73						1						864						128						937						129
Other foreign government						254						3						2,290						333						2,544						336
Total investment grade securities						4,562						147						35,764						5,186						40,326						5,333
Below investment grade securities:
Corporate						295						36						649						121						944						157
ABS						—						—						68						10						68						10
CMBS						—						—						4						1						4						1
Other foreign government						—						—						193						52						193						52
Total below investment grade securities						295						36						914						184						1,209						220
Total fixed maturity securities						$	4,857					$	183					$	36,678					$	5,370					$	41,535					$	5,553

						Less than 12 months												12 months or greater												Total
December 31, 2022:						Estimated Fair Value						Gross Unrealized Losses						Estimated Fair Value						Gross Unrealized Losses						Estimated Fair Value						Gross Unrealized Losses
Investment grade securities:
Corporate						$	21,867					$	2,756					$	6,840					$	2,225					$	28,707					$	4,981
Canadian government						554						42						71						23						625						65
Japanese government						815						86						1,694						392						2,509						478
ABS						1,596						153						1,931						269						3,527						422
CMBS						1,314						144						281						65						1,595						209
RMBS						664						62						181						53						845						115
U.S. government						1,202						64						253						148						1,455						212
State and political subdivisions						819						124						131						50						950						174
Other foreign government						1,942						167						1,026						260						2,968						427
Total investment grade securities						30,773						3,598						12,408						3,485						43,181						7,083
Below investment grade securities:
Corporate						767						87						305						61						1,072						148
ABS						52						6						38						9						90						15
CMBS						—						—						—						—						—						—
Other foreign government						39						2						164						60						203						62
Total below investment grade securities						858						95						507						130						1,365						225
Total fixed maturity securities						$	31,631					$	3,693					$	12,915					$	3,615					$	44,546					$	7,308

Investment Income [Table Text Block]

Major categories of net investment income consist of the following (dollars in millions):

						For the years ended December 31,
						2023						2022						2021
Fixed maturity securities available-for-sale						$	2,753					$	2,305					$	2,059
Equity securities						6						6						5
Mortgage loans						324						298						293
Policy loans						54						54						55
Funds withheld at interest						317						253						351
Limited partnerships and real estate joint ventures						181						331						419
Short-term investments and cash and cash equivalents						99						29						3
Other invested assets						21						12						61
Investment income						3,755						3,288						3,246
Investment expense						(164)						(127)						(108)
Net investment income						$	3,591					$	3,161					$	3,138

Gain (Loss) on Securities [Table Text Block]

Investment related gains (losses), net consist of the following (dollars in millions):

						For the years ended December 31,
						2023						2022						2021
Fixed maturity securities available-for-sale:
Change in allowance for credit losses						$	(38)					$	(6)					$	(11)
Impairments on fixed maturity securities						(3)						(17)						(1)
Realized gains on investment activity						72						192						299
Realized losses on investment activity						(275)						(396)						(65)
Net gains (losses) on equity securities						(1)						(21)						25
Change in mortgage loan allowance for credit losses						(16)						(16)						29
Change in fair value of certain limited partnership investments						48						38						169
Net losses on free-standing derivatives						(129)						(166)						(10)
Net gains (losses) on embedded derivatives						(163)						(173)						107
Other, net						24						26						25
Total investment related gains (losses), net						$	(481)					$	(539)					$	567

Schedule of Repurchase Agreements [Table Text Block]

The following table provides information relating to securities lending and repurchase/reverse repurchase agreements as of December 31, 2023 and 2022 (dollars in millions):

			2023												2022
			Amortized Cost						Estimated Fair Value						Amortized Cost						Estimated Fair Value
Securities borrowing transactions:
Securities borrowed (1)			n/a						$	947					n/a						$	852
Securities pledged as collateral (2)			$	845					676						$	859					693
Securities lending transactions:
Securities loaned (2)			60						56						59						55
Securities received as collateral (3)			n/a						66						n/a						66
Repurchase/reverse repurchase transactions:
Securities sold (2)			1,486						1,333						898						779
Securities purchased (3)			n/a						517						n/a						619
Cash received (4)			820						820						149						149

(1)Securities borrowed are not reflected on the consolidated balance sheets. Collateral associated with certain borrowed securities is not included within this table as the collateral pledged to the counterparty is the right to reinsurance treaty cash flows.

(2)Securities loaned, pledged or sold to counterparties are included within fixed maturity securities.

(3)Securities received as collateral or purchased from counterparties are not reflected on the consolidated financial statements.

(4)A payable for the cash received by the Company is included within other liabilities.

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

The following tables present information on the remaining contractual maturity of the Company’s securities lending and repurchase agreements as of December 31, 2023 and 2022, respectively (dollars in millions):

			December 31, 2023
			Remaining Contractual Maturity of the Agreements
			Overnight and Continuous						Up to 30 Days						30 – 90 Days						Greater than 90 Days						Total
Securities lending transactions:
Corporate			$	—					$	—					$	—					$	40					$	40
State and political subdivisions			—						—						—						11						11
Other foreign government			—						—						—						5						5
Total			—						—						—						56						56
Repurchase/reverse repurchase transactions:
Corporate			—						—						—						553						553
Japanese government			—						—						—						158						158
ABS			—						—						—						229						229
CMBS			—						—						—						221						221
RMBS			—						—						—						52						52
U.S. government and agencies			—						—						—						14						14
Other foreign government			—						—						—						106						106
Total			—						—						—						1,333						1,333
Total transactions			$	—					$	—					$	—					$	1,389					$	1,389

			December 31, 2022
			Remaining Contractual Maturity of the Agreements
			Overnight and Continuous						Up to 30 Days						30 – 90 Days						Greater than 90 Days						Total
Securities lending transactions:
Corporate			$	—					$	—					$	—					$	42					$	42
Canadian government			—						—						—						5						5
State and political subdivisions			—						—						—						3						3
Other foreign government			—						—						—						5						5
Total			—						—						—						55						55
Repurchase/reverse repurchase transactions:
Corporate			—						—						—						279						279
Japanese government			—						—						—						278						278
ABS			—						—						—						54						54
CMBS			—						—						—						63						63
RMBS			—						—						—						10						10
Other foreign government			—						—						—						95						95
Total			—						—						—						779						779
Total transactions			$	—					$	—					$	—					$	834					$	834

Disclosure Of Real Estate Holdings By Property Type [Table Text Block]

The recorded investment in mortgage loans presented below is gross of unamortized deferred loan origination fees and expenses, and allowance for credit losses.

The following table presents the distribution of the Company’s recorded investment in mortgage loans by property type as of December 31, 2023 and 2022 (dollars in millions):

						2023												2022
						Carrying Value						% of Total						Carrying Value						% of Total
Property type:
Office						$	1,700					22.8		%				$	1,706					25.6		%
Retail						2,437						32.7						2,290						34.4
Industrial						1,947						26.1						1,518						22.8
Apartment						913						12.2						763						11.5
Hotel						413						5.5						319						4.8
Other commercial						49						0.7						57						0.9
Recorded investment						7,459						100.0		%				6,653						100.0		%
Unamortized balance of loan origination fees and expenses						(15)												(12)
Allowance for credit losses						(67)												(51)
Total mortgage loans						$	7,377											$	6,590

Disclosure of Real Estate Holdings Classified By Contractual Maturity Date [Table Text Block]

The following table presents the maturities of the Company’s recorded investment in mortgage loans as of December 31, 2023 and 2022 (dollars in millions):

						2023												2022
						Recorded Investment						% of Total						Recorded Investment						% of Total
Due within five years						$	3,228					43.3		%				$	2,652					39.9		%
Due after five years through ten years						3,334						44.7						2,930						44.0
Due after ten years						897						12.0						1,071						16.1
Total						$	7,459					100.0		%				$	6,653					100.0		%

Accounts Receivable, Noncurrent, Credit Quality Indicator

The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of December 31, 2023 and 2022 (dollars in millions):

			Recorded Investment
			Debt Service Ratios																		Construction loans
			>1.20x						1.00x – 1.20x						<1.00x												Total						% of Total
December 31, 2023:
Loan-to-Value Ratio
0% – 59.99%			$	3,672					$	272					$	27					$	46					$	4,017					53.9		%
60% – 69.99%			1,947						154						44						—						2,145						28.8
70% – 79.99%			843						52						34						—						929						12.4
80% or greater			198						70						100						—						368						4.9
Total			$	6,660					$	548					$	205					$	46					$	7,459					100.0		%

			Recorded Investment
			Debt Service Ratios																		Construction loans
			>1.20x						1.00x – 1.20x						<1.00x												Total						% of Total
December 31, 2022:
Loan-to-Value Ratio
0% – 59.99%			$	3,466					$	215					$	56					$	18					$	3,755					56.4		%
60% – 69.99%			1,894						119						71						—						2,084						31.3
70% – 79.99%			475						49						91						—						615						9.3
80% or greater			81						—						118						—						199						3.0
Total			$	5,916					$	383					$	336					$	18					$	6,653					100.0		%

Financing Receivable Credit Quality Indicators [Table Text Block]

The following table sets forth credit quality grades by year of origination of the Company’s recorded investment in mortgage loans as of December 31, 2023 and 2022 (dollars in millions):

			Recorded Investment
			Year of Origination
December 31, 2023:			2023						2022						2021						2020						2019						Prior						Total
Internal credit quality grade:
High investment grade			$	475					$	635					$	573					$	304					$	491					$	1,734					$	4,212
Investment grade			754						668						384						245						313						564						2,928
Average			12						—						—						18						63						203						296
Watch list			—						—						—						—						—						16						16
In or near default			—						—						—						—						—						7						7
Total			$	1,241					$	1,303					$	957					$	567					$	867					$	2,524					$	7,459

			Recorded Investment
			Year of Origination
December 31, 2022:			2022						2021						2020						2019						2018						Prior						Total
Internal credit quality grade:
High investment grade			$	698					$	684					$	327					$	561					$	422					$	1,565					$	4,257
Investment grade			586						284						248						279						252						531						2,180
Average			—						6						—						39						52						83						180
Watch list			—						—						—						—						—						—						—
In or near default			—						—						—						—						—						36						36
Total			$	1,284					$	974					$	575					$	879					$	726					$	2,215					$	6,653

Financing Receivable, Past Due

The following table presents the current and past due composition of the Company’s recorded investment in mortgage loans as of December 31, 2023 and 2022 (dollars in millions):

						2023						2022
Current						$	7,431					$	6,617
31 – 60 days past due						28						—
Greater than 90 days						—						36
Total						$	7,459					$	6,653

Allowance For Loan And Lease Losses Provision For Loss Net [Table Text Block]

The following table presents information regarding the Company’s allowance for credit losses for mortgage loans as of December 31, 2023, 2022 and 2021 (dollars in millions):

						2023						2022						2021
Balance, beginning of period						$	51					$	35					$	64
Change in allowance for credit losses						16						16						(29)
Balance, end of period						$	67					$	51					$	35

Real Estate Investment Financial Statements, Disclosure

Limited Partnerships and Real Estate Joint Ventures

The carrying values of limited partnerships and real estate joint ventures as of December 31, 2023 and 2022 are as follows (dollars in millions):

						2023						2022
Limited partnerships – equity method						$	925					$	934
Limited partnerships – fair value						856						683
Limited partnerships – cost method						71						49
Real estate joint ventures						783						661
Total limited partnerships and real estate joint ventures						$	2,635					$	2,327

Schedule of Other Assets [Table Text Block]

The carrying values of other invested assets as of December 31, 2023 and 2022 are as follows (dollars in millions):

						2023						2022
Lifetime mortgages						$	944					$	868
Derivatives						97						170
Other						130						102
Total other invested assets						$	1,171					$	1,140

X

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The table presents the rollforward of valuation allowance for mortgage loans held-for-investment, by portfolio segment.

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Investments classified by contractual maturity date.

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