Share Repurchase Transactions and Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($)
Equity [Abstract]
Unrealized losses on available-for-sale securities, tax benefit	$ 6
Foreign currency translation adjustments, income tax benefit	4
Change in fair value of derivative instruments, income taxes	$ 1

Other comprehensive income unrealized holding loss on debt securities arising during period tax benefit.

No definition available.

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Namespace Prefix:	hca_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration