Medical Costs Payable (Tables)

12 Months Ended

Dec. 31, 2021

Insurance [Abstract]

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

The following table shows the components of the change in medical costs payable for the years ended December 31:

(in millions)	2021		2020		2019
Medical costs payable, beginning of period	$	21,872	$	21,690	$	19,891
Acquisitions	88		316		679
Reported medical costs:
Current year	188,631		160,276		157,020
Prior years	(1,720)		(880)		(580)
Total reported medical costs	186,911		159,396		156,440
Medical payments:
Payments for current year	(165,524)		(139,974)		(137,155)
Payments for prior years	(18,864)		(19,556)		(18,165)
Total medical payments	(184,388)		(159,530)		(155,320)
Medical costs payable, end of period	$	24,483	$	21,872	$	21,690

Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block]

The following is information about incurred and paid medical cost development as of December 31, 2021:

	Net Incurred Medical Costs
(in millions)	For the Years Ended December 31,
Year	2020		2021
2020	$	160,276	$	159,140
2021			188,631
Total			$	347,771
	Net Cumulative Medical Payments
(in millions)	For the Years Ended December 31,
Year	2020		2021
2020	$	(139,974)	$	(158,182)
2021			(165,524)
Total			(323,706)
Net remaining outstanding liabilities prior to 2020			418
Total medical costs payable			$	24,483