Quarterly report pursuant to Section 13 or 15(d)

Medical Claims Liability - Schedule of Change in Medical Claims Liability (Details)

v3.21.1
Medical Claims Liability - Schedule of Change in Medical Claims Liability (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Balance, January 1 $ 12,438 $ 7,473
Less: Reinsurance recoverable 23 20
Balance, January 1, net 12,415 7,453
Acquisitions and divestitures 0 3,697
Incurred related to:    
Current year 24,255 20,866
Prior years (864) (446)
Total incurred 23,391 20,420
Paid related to:    
Current year 15,161 15,147
Prior years 7,828 5,031
Total paid 22,989 20,178
Balance at March 31, net 12,817 11,392
Plus: Reinsurance recoverable 25 21
Balance, March 31 $ 12,842 $ 11,413