XML 42 R31.htm IDEA: XBRL DOCUMENT

Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Uncompensated Care (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accounting Policies [Abstract]
Patient care costs (salaries and benefits, supplies, other operating expenses and depreciation and amortization)	$ 11,950	$ 9,916	$ 23,593	$ 21,258
Cost-to-charges ratio (patient care costs as percentage of gross patient charges)	11.10%	12.60%	11.20%	12.20%
Total uncompensated care	$ 7,696	$ 6,729	$ 14,517	$ 14,602
Multiply by the cost-to-charges ratio	11.10%	12.60%	11.20%	12.20%
Estimated cost of total uncompensated care	$ 848	$ 844	$ 1,626	$ 1,781