Share Repurchase Transactions and Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) $ in Millions	6 Months Ended
Jun. 30, 2023 USD ($)
Equity [Abstract]
Foreign currency translation adjustments, income tax expense	$ 6

Other comprehensive income foreign currency translation adjustment tax expense.

No definition available.

Name:	hca_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxExpense
Namespace Prefix:	hca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration