v3.25.1
Medical Claims Liability - Schedule of Change in Medical Claims Liability (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 $ 18,308 $ 18,000
Less: Reinsurance recoverable 65 49
Balance, January 1, net 18,243 17,951
Incurred related to:    
Current year 37,458 31,931
Prior years (1,133) (1,049)
Total incurred 36,325 30,882
Paid related to:    
Current year 23,329 19,686
Prior years 11,570 11,124
Total paid 34,899 30,810
Premium deficiency reserve liability 178 50
Balance, March 31, net 19,847 18,073
Plus: Reinsurance recoverable 64 36
Balance, March 31 19,911 18,109
Medicaid    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 10,299 10,814
Less: Reinsurance recoverable 18 5
Balance, January 1, net 10,281 10,809
Incurred related to:    
Current year 21,419 20,179
Prior years (576) (684)
Total incurred 20,843 19,495
Paid related to:    
Current year 12,996 12,823
Prior years 6,849 6,993
Total paid 19,845 19,816
Premium deficiency reserve liability 0 0
Balance, March 31, net 11,279 10,488
Plus: Reinsurance recoverable 18 4
Balance, March 31 11,297 10,492
Medicare    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 3,358 3,612
Less: Reinsurance recoverable 0 0
Balance, January 1, net 3,358 3,612
Incurred related to:    
Current year 7,553 5,495
Prior years (176) (156)
Total incurred 7,377 5,339
Paid related to:    
Current year 5,243 3,266
Prior years 1,923 2,050
Total paid 7,166 5,316
Premium deficiency reserve liability 178 50
Balance, March 31, net 3,747 3,685
Plus: Reinsurance recoverable 0 0
Balance, March 31 3,747 3,685
Commercial    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 4,463 3,460
Less: Reinsurance recoverable 47 44
Balance, January 1, net 4,416 3,416
Incurred related to:    
Current year 7,972 5,884
Prior years (365) (204)
Total incurred 7,607 5,680
Paid related to:    
Current year 4,731 3,339
Prior years 2,648 1,973
Total paid 7,379 5,312
Premium deficiency reserve liability 0 0
Balance, March 31, net 4,644 3,784
Plus: Reinsurance recoverable 46 32
Balance, March 31 4,690 3,816
Other    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 188 114
Less: Reinsurance recoverable 0 0
Balance, January 1, net 188 114
Incurred related to:    
Current year 514 373
Prior years (16) (5)
Total incurred 498 368
Paid related to:    
Current year 359 258
Prior years 150 108
Total paid 509 366
Premium deficiency reserve liability 0 0
Balance, March 31, net 177 116
Plus: Reinsurance recoverable 0 0
Balance, March 31 $ 177 $ 116