Acquisitions and Divestitures (Divestitures Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 item	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Mar. 18, 2020 item	Jan. 30, 2020 item
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hospital closures	0
Shands Live Oak Regional Medical Center [Member] | Live Oak, Florida [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds					25
Shands Starke Regional Medical Center [Member] | Starke, Florida [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds					49
Northern Louisiana Medical Center [Member] | Ruston, Louisiana [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds				130
Tennova Healthcare [Member]
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