XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.21.1

Financial Instruments - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Estimated amount reclassified from other comprehensive income and reduce interest expense | $ 30
Estimated termination value | $ 37

X
- Definition Derivative, credit risk related contingent features estimated termination value. + References No definition available. + Details
Name: | hca_DerivativeCreditRiskRelatedContingentFeaturesEstimatedTerminationValue
Namespace Prefix: | hca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80845-113994 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration