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v3.23.1

Share Repurchase Transactions and Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2023 USD ($)
Equity [Abstract] |
Unrealized gains on available-for-sale securities, tax expense | $ 2
Foreign currency translation adjustments, income tax expense | $ 3

X
- Definition Other comprehensive income foreign currency translation adjustment tax expense. + References No definition available. + Details
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Namespace Prefix: | hca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other comprehensive income unrealized holding gains on debt securities arising during period tax expenses. + References No definition available. + Details
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Namespace Prefix: | hca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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