Fair Value Measurements (excluding Consolidated Investment Entities) - Other Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets held in separate accounts	$ 113,007	$ 101,676
Derivatives	282	332
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, including securities pledged	30,151	27,454
Equity securities	201	246
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements	2,357	2,535
Derivatives	197	303
Other investments, including securities pledged	86	74
Assets held in separate accounts	113,007	101,676
Derivatives	282	332
Short-term debt	586	399
Long-term debt	1,518	2,103
Carrying Value \| Stabilizer and MCGs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	5	19
Carrying Value \| Embedded derivatives within reinsurance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	55	55
Derivatives	(9)	41
Carrying Value \| Funding agreements without fixed maturities and deferred annuities(1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	33,793	31,082
Carrying Value \| Funding agreements with fixed maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	2,101	1,249
Carrying Value \| Supplementary contracts and immediate annuities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	504	570
Carrying Value \| Mortgage loans on real estate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,608	4,699
Carrying Value \| Policy loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	323	342
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, including securities pledged	30,151	27,454
Equity securities	201	246
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements	2,357	2,535
Derivatives	197	303
Other investments, including securities pledged	86	74
Assets held in separate accounts	113,007	101,676
Derivatives	282	332
Short-term debt	588	399
Long-term debt	1,489	2,023
Fair Value \| Stabilizer and MCGs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	5	19
Fair Value \| Embedded derivatives within reinsurance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	55	55
Derivatives	(9)	41
Fair Value \| Funding agreements without fixed maturities and deferred annuities(1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	37,154	32,877
Fair Value \| Funding agreements with fixed maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	2,120	1,257
Fair Value \| Supplementary contracts and immediate annuities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment contract liabilities:	481	515
Fair Value \| Mortgage loans on real estate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,522	4,459
Fair Value \| Policy loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	$ 323	$ 342

Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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