Medical Claims Liability (Tables)

9 Months Ended

Sep. 30, 2021

Insurance [Abstract]

Schedule of change in medical claims liability

The following table summarizes the change in medical claims liability ($ in millions):

	Nine Months Ended September 30,
	2021		2020
Balance, January 1	$	12,438	$	7,473
Less: Reinsurance recoverable	23		20
Balance, January 1, net	12,415		7,453
Acquisitions and divestitures	—		3,872
Incurred related to:
Current year	74,736		64,105
Prior years	(1,526)		(446)
Total incurred	73,210		63,659
Paid related to:
Current year	62,205		56,074
Prior years	9,344		6,032
Total paid	71,549		62,106
Balance at September 30, net	14,076		12,878
Plus: Reinsurance recoverable	23		21
Balance, September 30	$	14,099	$	12,899