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BENEFITS PAYABLE (Tables)
12 Months Ended
Dec. 31, 2020
Insurance [Abstract]  
Schedule of Activity in Benefits Payable
On a consolidated basis, activity in benefits payable was as follows for the years ended December 31, 2020, 2019 and 2018:
202020192018
 (in millions)
Balances at January 1$6,004 $4,862 $4,668 
Less: Reinsurance recoverables(68)(95)(70)
Balances at January 1, net5,936 4,767 4,598 
Incurred related to:
Current year61,941 54,193 46,385 
Prior years(313)(336)(503)
Total incurred61,628 53,857 45,882 
Paid related to:
Current year(54,003)(48,421)(41,736)
Prior years(5,418)(4,267)(3,977)
Total paid(59,421)(52,688)(45,713)
Reinsurance recoverable— 68 95 
Balances at December 31$8,143 $6,004 $4,862 
Activity in benefits payable for our Retail segment was as follows for the years ended December 31, 2020, 2019 and 2018:
202020192018
 (in millions)
Balances at January 1$5,363 $4,338 $3,963 
Less: Reinsurance recoverables(68)(95)(70)
Balances at January 1, net5,295 4,243 3,893 
Incurred related to:
Current year56,821 48,983 41,323 
Prior years(266)(386)(398)
Total incurred56,555 48,597 40,925 
Paid related to:
Current year(49,586)(43,831)(37,189)
Prior years(4,836)(3,714)(3,386)
Total paid(54,422)(47,545)(40,575)
Reinsurance recoverable— 68 95 
Balances at December 31$7,428 $5,363 $4,338 
Activity in benefits payable for our Group and Specialty segment, excluding military services, was as follows for the years ended December 31, 2020, 2019 and 2018:
202020192018
 (in millions)
Balances at January 1$641 $517 $568 
Incurred related to:
Current year5,576 5,708 5,466 
Prior years(47)50 (46)
Total incurred5,529 5,758 5,420 
Paid related to:
Current year(4,873)(5,081)(4,957)
Prior years(582)(553)(514)
Total paid(5,455)(5,634)(5,471)
Balances at December 31$715 $641 $517 
Schedule of Favorable Medical Claims Reserve Development Related to Prior Fiscal Years by Segment The table below details our favorable medical claims reserve development related to prior fiscal years by segment for 2020, 2019, and 2018.
 (Favorable) Unfavorable Medical Claims Reserve
Development
 202020192018
 
Retail Segment$(266)$(386)$(398)
Group and Specialty Segment(47)50 (46)
Individual Commercial Segment— — (57)
Other Businesses— — (2)
Total$(313)$(336)$(503)
Schedule of Incurred and Paid Claims Development
The following tables provide information about incurred and paid claims development for the Retail segment as of December 31, 2020, net of reinsurance.
Incurred Claims, Net of Reinsurance
For the Years Ended December 31,
Claims Incurred Year2018
Unaudited
2019
Unaudited
2020
(in millions)
2018$41,323 $40,984 $40,946 
201948,983 48,820 
202056,821 
 Total$146,587 
Cumulative Paid Claims, Net of Reinsurance
For the Years Ended December 31,
Claims Incurred Year2018
Unaudited
2019
Unaudited
2020
(in millions)
2018$37,189 $40,841 $40,946 
201943,831 48,627 
202049,586 
 Total139,159 
All outstanding benefit liabilities before 2018, net of reinsuranceN/A
Benefits payable, net of reinsurance$7,428 
    The following tables provide information about incurred and paid claims development for the Group and Specialty segment as of December 31, 2020, net of reinsurance.
Incurred Claims, Net of Reinsurance
For the Years Ended December 31,
Claims Incurred Year2018
Unaudited
2019
Unaudited
2020
(in millions)
2018$5,466 $5,501 $5,505 
20195,708 5,657 
20205,576 
 Total$16,738 
Cumulative Paid Claims, Net of Reinsurance
For the Years Ended December 31,
Claims Incurred Year2018
Unaudited
2019
Unaudited
2020
(in millions)
2018$4,957 $5,487 $5,505 
20195,081 5,645 
20204,873 
Total16,023 
All outstanding benefit liabilities before 2018, net of reinsuranceN/A
Benefits payable, net of reinsurance$715 
Schedule of Reconciliation of Net Incurred and Paid Claims to Benefits Payable
The reconciliation of the net incurred and paid claims development tables to benefits payable in the consolidated statement of financial position is as follows:    
December 31,
2020
Net outstanding liabilities
Retail$7,428 
Group and Specialty715 
    Benefits payable, net of reinsurance8,143 
Reinsurance recoverable on unpaid claims
Retail— 
     Total benefits payable, gross$8,143