XML 33 R22.htm IDEA: XBRL DOCUMENT
v3.26.1

Short-term and Long-term Investments, Restricted Deposits (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract] |
Schedule of Short-term and Long-term Investments and Restricted Deposits by Investment Type | Short-term and long-term investments and restricted deposits by investment type consist of the following ($ in millions):
|  | March 31, 2026 |  | December 31, 2025
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies | $ | 532 |  |  | $ | 1 |  |  | $ | (1) |  |  | $ | 532 |  |  | $ | 533 |  |  | $ | 3 |  |  | $ | (1) |  |  | $ | 535 |
Corporate securities | 10,676 |  |  | 89 |  |  | (173) |  |  | 10,592 |  |  | 10,642 |  |  | 166 |  |  | (146) |  |  | 10,662 |
Restricted certificates of deposit | 1 |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | 1 |
Restricted cash equivalents | 89 |  |  | — |  |  | — |  |  | 89 |  |  | 69 |  |  | — |  |  | — |  |  | 69 |
Short-term time deposits | 68 |  |  | — |  |  | — |  |  | 68 |  |  | 205 |  |  | — |  |  | — |  |  | 205 |
Municipal securities | 3,736 |  |  | 25 |  |  | (72) |  |  | 3,689 |  |  | 3,790 |  |  | 37 |  |  | (69) |  |  | 3,758 |
Asset-backed securities | 1,612 |  |  | 13 |  |  | (13) |  |  | 1,612 |  |  | 1,656 |  |  | 20 |  |  | (10) |  |  | 1,666 |
Residential mortgage-backed securities | 1,764 |  |  | 14 |  |  | (75) |  |  | 1,703 |  |  | 1,763 |  |  | 21 |  |  | (70) |  |  | 1,714 |
Commercial mortgage-backed securities | 1,140 |  |  | 6 |  |  | (31) |  |  | 1,115 |  |  | 1,156 |  |  | 9 |  |  | (29) |  |  | 1,136 |
Equity securities | 1 |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | 1 |
Private equity investments | 896 |  |  | — |  |  | — |  |  | 896 |  |  | 915 |  |  | — |  |  | — |  |  | 915 |
Life insurance contracts | 210 |  |  | — |  |  | — |  |  | 210 |  |  | 217 |  |  | — |  |  | — |  |  | 217 |
Total | $ | 20,725 |  |  | $ | 148 |  |  | $ | (365) |  |  | $ | 20,508 |  |  | $ | 20,948 |  |  | $ | 256 |  |  | $ | (325) |  |  | $ | 20,879 |
Schedule of Fair Value of Available-for-sale Debt Securities with Gross Unrealized Losses by Investment Type in a Continuous Unrealized Loss Position | The fair value of available-for-sale debt securities with gross unrealized losses by investment type and length of time that individual securities have been in a continuous unrealized loss position were as follows ($ in millions):
| March 31, 2026 |  | December 31, 2025
| Less Than 12 Months |  | 12 Months or More |  | Less Than 12 Months |  | 12 Months or More
| Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
U.S. Treasury securities and obligations of U.S. government corporations and agencies | $ | (1) |  |  | $ | 203 |  |  | $ | — |  |  | $ | 28 |  |  | $ | — |  |  | $ | 88 |  |  | $ | (1) |  |  | $ | 43 |
Corporate securities | (20) |  |  | 2,130 |  |  | (153) |  |  | 2,933 |  |  | (2) |  |  | 464 |  |  | (144) |  |  | 3,226 |
Municipal securities | (4) |  |  | 582 |  |  | (68) |  |  | 1,431 |  |  | (1) |  |  | 241 |  |  | (68) |  |  | 1,550 |
Asset-backed securities | (3) |  |  | 307 |  |  | (10) |  |  | 159 |  |  | (2) |  |  | 114 |  |  | (8) |  |  | 180 |
Residential mortgage-backed securities | (3) |  |  | 267 |  |  | (72) |  |  | 618 |  |  | — |  |  | 120 |  |  | (70) |  |  | 687 |
Commercial mortgage-backed securities | (2) |  |  | 235 |  |  | (29) |  |  | 457 |  |  | — |  |  | 156 |  |  | (29) |  |  | 480 |
Total | $ | (33) |  |  | $ | 3,724 |  |  | $ | (332) |  |  | $ | 5,626 |  |  | $ | (5) |  |  | $ | 1,183 |  |  | $ | (320) |  |  | $ | 6,166 |
Schedule of Contractual Maturities of Short-term and Long-term Investments and Restricted Deposits | The contractual maturities of short-term and long-term debt securities and restricted deposits are as follows ($ in millions):
| March 31, 2026 |  | December 31, 2025
| Investments |  | Restricted Deposits |  | Investments |  | Restricted Deposits
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
One year or less | $ | 2,231 |  |  | $ | 2,217 |  |  | $ | 466 |  |  | $ | 465 |  |  | $ | 2,201 |  |  | $ | 2,190 |  |  | $ | 464 |  |  | $ | 464 |
One year through five years | 7,211 |  |  | 7,109 |  |  | 611 |  |  | 600 |  |  | 7,266 |  |  | 7,219 |  |  | 574 |  |  | 566 |
Five years through ten years | 4,058 |  |  | 4,057 |  |  | 348 |  |  | 349 |  |  | 4,198 |  |  | 4,252 |  |  | 334 |  |  | 339 |
Greater than ten years | 159 |  |  | 156 |  |  | 18 |  |  | 18 |  |  | 160 |  |  | 157 |  |  | 43 |  |  | 43 |
Asset-backed securities | 4,516 |  |  | 4,430 |  |  | — |  |  | — |  |  | 4,575 |  |  | 4,516 |  |  | — |  |  | — |
Total | $ | 18,175 |  |  | $ | 17,969 |  |  | $ | 1,443 |  |  | $ | 1,432 |  |  | $ | 18,400 |  |  | $ | 18,334 |  |  | $ | 1,415 |  |  | $ | 1,412 |

X
- Definition Short-term and long-term investments and restricted deposits by investment type + References No definition available. + Details
Name: | cnc_ShortTermAndLongTermInvestmentsAndRestrictedDepositsByInvestmentTypeTableTextBlock
Namespace Prefix: | cnc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration