Acquisitions and Divestitures - Divestitures - Additional Information (Details) $ in Millions				3 Months Ended		12 Months Ended
	Jun. 25, 2020 Item	Apr. 27, 2020 Item	Apr. 20, 2020 Item	Sep. 30, 2020 USD ($) Item	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Sep. 08, 2020 Item
Northern Louisiana Medical Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds				130
San Angelo Community Medical Center | San Angelo, Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds			171
Disposition completion date			Oct. 24, 2020
Abilene Regional Medical Center | Abilene, Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds		231
Disposition completion date		Oct. 27, 2020
Brownwood Regional Medical Center | Brownwood, Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds		188
Disposition completion date		Oct. 27, 2020
Lea Regional Medical Center | Hobbs, New Mexico
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds							68
Bayfront Health St Petersburg | St. Petersburg, Florida
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds	480
Disposition completion date	Oct. 01, 2020
Tennova Healthcare - Tullahoma | Tullahoma, Tennessee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds				135
Tennova Healthcare – Shelbyville | Shelbyville, Tennessee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds				60
Shands Lake Shore Regional Medical Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge recorded on the sale or closure of hospitals | $				$ 3
Shands Lake Shore Regional Medical Center | Lake City, Florida
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds				99
Tennova Healthcare
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge recorded on the sale or closure of hospitals | $					$ 27	$ 9