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Condensed Financial Information of Registrant - Schedule of Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |  |
Other operating activities, net | $ 75 | $ 72 | $ 168
Net cash provided by operating activities | 5,088 | 154 | 8,053
Cash flows from investing activities: |  |  |
Purchases of investments | (4,541) | (7,183) | (6,622)
Sales and maturities of investments | 5,780 | 5,785 | 5,523
Net cash provided by (used in) investing activities | 472 | (1,052) | (1,191)
Cash flows from financing activities: |  |  |
Proceeds from long-term debt | 750 | 1,300 | 2,335
Payments and repurchases of long-term debt | (1,895) | (622) | (2,316)
Common stock repurchases | (475) | (3,124) | (1,633)
Proceeds from common stock issuances | 37 | 46 | 44
Purchase of noncontrolling interest | (19) | 0 | (88)
Other financing activities, net | (19) | (6) | 0
Net cash used in financing activities | (1,621) | (2,406) | (1,658)
Cash, cash equivalents and restricted cash and cash equivalents, beginning of period | 14,156 | 17,452 | 12,330
Cash, cash equivalents and restricted cash and cash equivalents, end of period | 17,957 | 14,156 | 17,452
Parent Company |  |  |
Cash flows from operating activities: |  |  |
Dividends from subsidiaries | 1,671 | 1,797 | 2,823
Payments for legal settlement | (41) | (263) | (326)
Other operating activities, net | (584) | (422) | (334)
Net cash provided by operating activities | 1,046 | 1,112 | 2,163
Cash flows from investing activities: |  |  |
Capital contributions to subsidiaries | (2,001) | (730) | (443)
Purchases of investments | (20) | (2) | (202)
Sales and maturities of investments | 1 | 0 | 0
Return of capital from subsidiaries to parent company | 1,599 | 321 | 85
Proceeds from divestitures | 0 | 0 | 325
Intercompany activities | 989 | 1,693 | (357)
Net cash provided by (used in) investing activities | 568 | 1,282 | (592)
Cash flows from financing activities: |  |  |
Proceeds from long-term debt | 750 | 1,300 | 2,305
Payments and repurchases of long-term debt | (1,895) | (610) | (2,290)
Common stock repurchases | (475) | (3,124) | (1,633)
Proceeds from common stock issuances | 37 | 46 | 44
Purchase of noncontrolling interest | (19) | 0 | 0
Other financing activities, net | (19) | (6) | (2)
Net cash used in financing activities | (1,621) | (2,394) | (1,576)
Net increase (decrease) in cash and cash equivalents | (7) | 0 | (5)
Cash, cash equivalents and restricted cash and cash equivalents, beginning of period | 7 | 7 | 12
Cash, cash equivalents and restricted cash and cash equivalents, end of period | $ 0 | $ 7 | $ 7

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