v3.26.3
Medical Claims Liability - Schedule of Change in Medical Claims Liability (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Beginning balance $ 20,544 $ 18,308
Less: Reinsurance recoverable 76 65
Beginning balance 20,468 18,243
Incurred related to:    
Current year 120,320 118,195
Prior years (1,860) (2,172)
Total incurred 118,460 116,023
Paid related to:    
Current year 101,037 98,935
Prior years 16,446 14,101
Total paid 117,483 113,036
Plus: Premium deficiency reserve   190
Ending balance 21,445 21,420
Plus: Reinsurance recoverable 50 73
Ending balance 21,495 21,493
Medicaid    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Beginning balance 10,375 10,299
Less: Reinsurance recoverable 16 18
Beginning balance 10,359 10,281
Incurred related to:    
Current year 66,889 64,181
Prior years (1,101) (1,143)
Total incurred 65,788 63,038
Paid related to:    
Current year 56,197 53,764
Prior years 8,300 8,229
Total paid 64,497 61,993
Plus: Premium deficiency reserve   0
Ending balance 11,650 11,326
Plus: Reinsurance recoverable 15 17
Ending balance 11,665 11,343
Medicare    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Beginning balance 4,401 3,358
Less: Reinsurance recoverable 0 0
Beginning balance 4,401 3,358
Incurred related to:    
Current year 29,496 25,306
Prior years (268) (501)
Total incurred 29,228 24,805
Paid related to:    
Current year 25,236 21,544
Prior years 3,773 2,461
Total paid 29,009 24,005
Plus: Premium deficiency reserve   190
Ending balance 4,620 4,348
Plus: Reinsurance recoverable 0 0
Ending balance 4,620 4,348
Commercial    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Beginning balance 5,683 4,463
Less: Reinsurance recoverable 60 47
Beginning balance 5,623 4,416
Incurred related to:    
Current year 22,827 27,111
Prior years (478) (504)
Total incurred 22,349 26,607
Paid related to:    
Current year 18,504 22,201
Prior years 4,303 3,250
Total paid 22,807 25,451
Plus: Premium deficiency reserve   0
Ending balance 5,165 5,572
Plus: Reinsurance recoverable 35 56
Ending balance 5,200 5,628
Other    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Beginning balance 85 188
Less: Reinsurance recoverable 0 0
Beginning balance 85 188
Incurred related to:    
Current year 1,108 1,597
Prior years (13) (24)
Total incurred 1,095 1,573
Paid related to:    
Current year 1,100 1,426
Prior years 70 161
Total paid 1,170 1,587
Plus: Premium deficiency reserve   0
Ending balance 10 174
Plus: Reinsurance recoverable 0 0
Ending balance $ 10 $ 174