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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($) State Hospital Surgery_Center | Mar. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |
Number of owned and operated hospitals | Hospital | 186 |
Number of freestanding surgery centers | Surgery_Center | 123 |
Number of facilities locations | State | 21 |
General and administrative expense | $ 96 | $ 86
Charity care amount | 3,735 | 2,905
Estimated costs of charity care | 444 | 343
Senior Secured Three Six Four Day Term Loan Facility [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Maximum borrowing capacity | $ 2,000 |
Inpatient Services [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Performance obligations for inpatient/ outpatient services satisfied period | Our performance obligations for inpatient services are generally satisfied over periods that average approximately five days |
Out of Network Services [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Revenues | $ 86 | $ 55
Maximum [Member] | Outpatient Services [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Performance obligations for inpatient/ outpatient services satisfied period | Our performance obligations for outpatient services are generally satisfied over a period of less than one day |
Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Percentage of income of federal poverty level eligible for charity care | 400.00% |

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