Investments, Debt and Equity Securities (Policies)	12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Investments	The Cigna Group's investment portfolio consists of a broad range of investments including debt securities, equity securities, commercial mortgage loans, policy loans, other long-term investments, short-term investments and derivative financial instruments. The sections below provide more detail regarding our investment balances and realized investment gains and losses. See Note 13 for information about the valuation of the Company's investment portfolio. Debt securities, commercial mortgage loans, derivative financial instruments and short-term investments with contractual maturities during the next twelve months are classified on the balance sheet as current investments, unless they are held as statutory deposits or restricted for other purposes and then they are classified in Long-term investments. Equity securities may include funds that are used in our cash management strategy and are classified as current investments. All other investments are classified as Long-term investments. Accounting policy. Debt securities (including bonds, mortgage and other asset-backed securities and preferred stocks redeemable by the investor) are classified as available for sale and are carried at fair value with changes in fair value recorded either in Accumulated other comprehensive loss within Shareholders' equity or in credit loss expense based on fluctuations in the allowance for credit losses, as further discussed below. Prior to the adoption of LDTI on January 1, 2023, net unrealized appreciation on debt securities supporting the Company's run-off settlement annuity business was reported in Non-current insurance and contractholder liabilities rather than Accumulated other comprehensive loss. See Note 16 for impact to Accumulated other comprehensive loss. When the Company intends to sell or determines that it is more likely than not to be required to sell an impaired debt security, the excess of amortized cost over fair value is directly written down with a charge to Net realized investment (losses) gains. Certain asset-backed securities are considered variable interest entities. See Note 14 for additional information. The Company reviews declines in fair value from a debt security's amortized cost basis to determine whether a credit loss exists, and when appropriate, recognizes a credit loss allowance with a corresponding charge to credit loss expense, presented in Net realized investment (losses) gains in the Company's Consolidated Statements of Income. The allowance for credit loss represents the excess of amortized cost over the greater of its fair value or the net present value of the debt security's projected future cash flows (based on qualitative and quantitative factors, including the probability of default and the estimated timing and amount of recovery). Each period, the allowance for credit loss is adjusted as needed through credit loss expense. The Company does not measure an allowance for credit losses for accrued interest receivables. When interest payments are delinquent based on contractual terms or when certain terms (interest rate or maturity date) of the investment have been restructured, accrued interest, reported in Other current assets, is written off through a charge to Net investment income and interest income is recognized on a cash basis. Review of declines in fair value. Management reviews impaired debt securities to determine whether a credit loss allowance is needed based on criteria that include: •severity of decline; •financial health and specific prospects of the issuer; and •changes in the regulatory, economic or general market environment of the issuer's industry or geographic region. Accounting policy. Equity securities with a readily determinable fair value consist primarily of public equity investments in the health care sector and mutual funds that invest in fixed income debt securities while those without a readily determinable fair value consist of private equity investments. Changes in the fair values of equity securities that have a readily determinable fair value are reported in Net realized investment (losses) gains. Equity securities without a readily determinable fair value are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes. Accounting policy. Commercial mortgage loans are carried at unpaid principal balances, net of an allowance for expected credit losses, and classified as either current or long-term investments based on their contractual maturities. Changes in the allowance for expected credit losses are recognized as credit loss expense and presented in Net realized investment (losses) gains in the Company's Consolidated Statements of Income. Each period, the Company establishes (or adjusts) its allowance for expected credit losses for commercial mortgage loans. The allowance for expected credit losses is based on a credit risk category that is assigned to each loan at origination using key credit quality indicators, including debt service coverage and loan-to-value ratios. Credit risk categories are updated as key credit quality indicators change. An expected loss rate, assigned based on the credit risk category, is applied to each loan's unpaid principal balance to develop the aggregate allowance for expected credit losses. Commercial mortgage loans are considered impaired and written off against the allowance when it is probable that the Company will not collect all amounts due per the terms of the promissory note. In the event of a foreclosure, the allowance for credit losses is based on the excess of the carrying value of the mortgage loan over the fair value of its underlying collateral. Mortgage loans held by the Company are made exclusively to commercial borrowers and are diversified by property type, location and borrower. Loans are generally issued at fixed rates of interest and are secured by high quality, primarily completed and substantially leased operating properties. Credit quality. The Company regularly evaluates and monitors credit risk, beginning with the initial underwriting of a mortgage loan and continuing throughout the investment holding period. Mortgage origination professionals employ an internal credit quality rating system designed to evaluate the relative risk of the transaction at origination that is then updated each year as part of the annual portfolio loan review. The Company evaluates and monitors credit quality on a consistent and ongoing basis. Quality ratings are based on our evaluation of a number of key inputs related to the loan, including real estate market-related factors such as rental rates and vacancies, and property-specific inputs such as growth rate assumptions and lease rollover statistics. However, the two most significant contributors to the credit quality rating are the debt service coverage and loan-to-value ratios. The debt service coverage ratio measures the amount of property cash flow available to meet annual interest and principal payments on debt, with a ratio below 1.0 indicating that there is not enough cash flow to cover the required loan payments. The loan-to-value ratio, commonly expressed as a percentage, compares the amount of the loan to the fair value of the underlying property collateralizing the loan. Accounting policy. Policy loans, primarily associated with our corporate-owned life insurance business, are carried at unpaid principal balances plus accumulated interest, the total of which approximates fair value. These loans are collateralized by life insurance policy cash values and therefore have minimal exposure to credit loss. Interest rates are reset annually based on a rolling average of benchmark interest rates. Accounting policy. Other long-term investments include investments in unconsolidated entities, including certain limited partnerships and limited liability companies holding real estate, securities or loans and health care-related investments. These investments are carried at cost plus the Company's ownership percentage of reporting income or loss, based on the financial statements of the underlying investments that are generally reported at fair value. Income or loss from these investments is reported on a one quarter lag due to the timing of when financial information is received from the general partner or manager of the investments. Other long-term investments also include investment real estate carried at depreciated cost less any impairment write-downs to fair value when cash flows indicate that the carrying value may not be recoverable. Depreciation is generally recorded using the straight-line method based on the estimated useful life of each asset. Investment real estate as of December 31, 2023 and 2022 is expected to be held longer than one year and may include real estate acquired through the foreclosure of commercial mortgage loans. Additionally, foreign currency swaps carried at fair value and certain restricted deposits are reported in the table below as "Other." See discussion below for information on the Company's accounting policies for derivative financial instruments. Other long-term investments and related commitments are diversified by issuer, property type and geographic regions. These investments are primarily unconsolidated variable interest entities (see Note 14 for additional information).Our limited partnership investments are reduced as the Company receives cash distributions for returns on its investment that were previously recognized in Net investment income. Accounting policy. Security investments with maturities of greater than three months to one year from time of purchase are classified as short-term, available for sale and carried at fair value that approximates cost. Cash equivalents consist of short-term investments with maturities of three months or less from the time of purchase and are carried at cost that approximates fair value. Accounting policy. When interest and principal payments on investments are current, the Company recognizes interest income when it is earned. The Company recognizes interest income on a cash basis when interest payments are delinquent based on contractual terms or when certain terms (interest rate or maturity date) of the investment have been restructured. For unconsolidated entities that are included in other long-term investments, investment income is generally recognized according to the Company's share of the reported income or loss on the underlying investments. Investment income attributed to the Company's separate accounts is excluded from our earnings because associated gains and losses generally accrue directly to separate account policyholders. Accounting policy. Realized investment gains and losses are based on specifically identified assets and result from sales, investment asset write-downs, change in the fair value of certain derivatives and equity securities and changes in allowances for credit losses on debt securities and commercial mortgage loan investments. With the adoption of amended accounting guidance for long-duration insurance contracts on January 1, 2023 (discussed in Note 2 to the Consolidated Financial Statements), realized investment gains and losses no longer exclude amounts that were previously required to adjust future policy benefits for the run-off settlement annuity business. Prior period net realized investment losses have been updated to reflect the impact of adopting LDTI.

The Cigna Group's investment portfolio consists of a broad range of investments including debt securities, equity securities, commercial mortgage loans, policy loans, other long-term investments, short-term investments and derivative financial instruments. The sections below provide more detail regarding our investment balances and realized investment gains and losses. See Note 13 for information about the valuation of the Company's investment portfolio.

Debt securities, commercial mortgage loans, derivative financial instruments and short-term investments with contractual maturities during the next twelve months are classified on the balance sheet as current investments, unless they are held as statutory deposits or restricted for other purposes and then they are classified in Long-term investments. Equity securities may include funds that are used in our cash management strategy and are classified as current investments. All other investments are classified as Long-term investments.

Accounting policy. Debt securities (including bonds, mortgage and other asset-backed securities and preferred stocks redeemable by the investor) are classified as available for sale and are carried at fair value with changes in fair value recorded either in Accumulated other comprehensive loss within Shareholders' equity or in credit loss expense based on fluctuations in the allowance for credit losses, as further discussed below. Prior to the adoption of LDTI on January 1, 2023, net unrealized appreciation on debt securities supporting the Company's run-off settlement annuity business was reported in Non-current insurance and contractholder liabilities rather than Accumulated other comprehensive loss. See Note 16 for impact to Accumulated other comprehensive loss. When the Company intends to sell or determines that it is more likely than not to be required to sell an impaired debt security, the excess of amortized cost over fair value is directly written down with a charge to Net realized investment (losses) gains. Certain asset-backed securities are considered variable interest entities. See Note 14 for additional information.

The Company reviews declines in fair value from a debt security's amortized cost basis to determine whether a credit loss exists, and when appropriate, recognizes a credit loss allowance with a corresponding charge to credit loss expense, presented in Net realized investment (losses) gains in the Company's Consolidated Statements of Income. The allowance for credit loss represents the excess of amortized cost over the greater of its fair value or the net present value of the debt security's projected future cash flows (based on qualitative and quantitative factors, including the probability of default and the estimated timing and amount of recovery). Each period, the allowance for credit loss is adjusted as needed through credit loss expense.

The Company does not measure an allowance for credit losses for accrued interest receivables. When interest payments are delinquent based on contractual terms or when certain terms (interest rate or maturity date) of the investment have been restructured, accrued interest, reported in Other current assets, is written off through a charge to Net investment income and interest income is recognized on a cash basis.

Accounting policy. Equity securities with a readily determinable fair value consist primarily of public equity investments in the health care sector and mutual funds that invest in fixed income debt securities while those without a readily determinable fair value consist of private equity investments. Changes in the fair values of equity securities that have a readily determinable fair value are reported in Net realized investment (losses) gains. Equity securities without a readily determinable fair value are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes.

Accounting policy. Commercial mortgage loans are carried at unpaid principal balances, net of an allowance for expected credit losses, and classified as either current or long-term investments based on their contractual maturities. Changes in the allowance for expected credit losses are recognized as credit loss expense and presented in Net realized investment (losses) gains in the Company's Consolidated Statements of Income.

Each period, the Company establishes (or adjusts) its allowance for expected credit losses for commercial mortgage loans. The allowance for expected credit losses is based on a credit risk category that is assigned to each loan at origination using key credit quality indicators, including debt service coverage and loan-to-value ratios. Credit risk categories are updated as key credit quality indicators change. An expected loss rate, assigned based on the credit risk category, is applied to each loan's unpaid principal balance to develop the aggregate allowance for expected credit losses. Commercial mortgage loans are considered impaired and written off against the allowance when it is probable that the Company will not collect all amounts due per the terms of the promissory note. In the event of a foreclosure, the allowance for credit losses is based on the excess of the carrying value of the mortgage loan over the fair value of its underlying collateral.

Mortgage loans held by the Company are made exclusively to commercial borrowers and are diversified by property type, location and borrower. Loans are generally issued at fixed rates of interest and are secured by high quality, primarily completed and substantially leased operating properties.

Credit quality. The Company regularly evaluates and monitors credit risk, beginning with the initial underwriting of a mortgage loan and continuing throughout the investment holding period. Mortgage origination professionals employ an internal credit quality rating system designed to evaluate the relative risk of the transaction at origination that is then updated each year as part of the annual portfolio loan review. The Company evaluates and monitors credit quality on a consistent and ongoing basis.

Quality ratings are based on our evaluation of a number of key inputs related to the loan, including real estate market-related factors such as rental rates and vacancies, and property-specific inputs such as growth rate assumptions and lease rollover statistics. However, the two most significant contributors to the credit quality rating are the debt service coverage and loan-to-value ratios. The debt service coverage ratio measures the amount of property cash flow available to meet annual interest and principal payments on debt, with a ratio below 1.0 indicating that there is not enough cash flow to cover the required loan payments. The loan-to-value ratio, commonly expressed as a percentage, compares the amount of the loan to the fair value of the underlying property collateralizing the loan.

Accounting policy. Policy loans, primarily associated with our corporate-owned life insurance business, are carried at unpaid principal balances plus accumulated interest, the total of which approximates fair value. These loans are collateralized by life insurance policy cash values and therefore have minimal exposure to credit loss. Interest rates are reset annually based on a rolling average of benchmark interest rates.

Accounting policy. Other long-term investments include investments in unconsolidated entities, including certain limited partnerships and limited liability companies holding real estate, securities or loans and health care-related investments. These investments are carried at cost plus the Company's ownership percentage of reporting income or loss, based on the financial statements of the underlying investments that are generally reported at fair value. Income or loss from these investments is reported on a one quarter lag due to the timing of when financial information is received from the general partner or manager of the investments.

Other long-term investments also include investment real estate carried at depreciated cost less any impairment write-downs to fair value when cash flows indicate that the carrying value may not be recoverable. Depreciation is generally recorded using the straight-line method based on the estimated useful life of each asset. Investment real estate as of December 31, 2023 and 2022 is expected to be held longer than one year and may include real estate acquired through the foreclosure of commercial mortgage loans.

Additionally, foreign currency swaps carried at fair value and certain restricted deposits are reported in the table below as "Other." See discussion below for information on the Company's accounting policies for derivative financial instruments.

Accounting policy. Security investments with maturities of greater than three months to one year from time of purchase are classified as short-term, available for sale and carried at fair value that approximates cost. Cash equivalents consist of short-term investments with maturities of three months or less from the time of purchase and are carried at cost that approximates fair value.

Accounting policy. When interest and principal payments on investments are current, the Company recognizes interest income when it is earned. The Company recognizes interest income on a cash basis when interest payments are delinquent based on contractual terms or when certain terms (interest rate or maturity date) of the investment have been restructured. For unconsolidated entities that are included in other long-term investments, investment income is generally recognized according to the Company's share of the reported income or loss on the underlying investments. Investment income attributed to the Company's separate accounts is excluded from our earnings because associated gains and losses generally accrue directly to separate account policyholders.