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Share Repurchase Transactions and Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) $ in Millions | 9 Months Ended
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Sep. 30, 2024 USD ($)
Equity [Abstract] |
Unrealized gains on available-for-sale securities, tax expense | $ 2
Foreign currency translation adjustments, income tax benefit | $ 8

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

X
- Definition Other comprehensive income unrealized holding gain on debt securities arising during period 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
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration