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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Nov. 30, 2017 | Jun. 30, 2022 USD ($) Hospital SurgeryCenter EndoscopyCenter State | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) Hospital SurgeryCenter EndoscopyCenter State | Jun. 30, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of owned and operated hospitals | Hospital |  | 182 |  | 182 |
Number of freestanding surgery centers | SurgeryCenter |  | 126 |  | 126 |
Number of freestanding endoscopy centers | EndoscopyCenter |  | 21 |  | 21 |
Number of facilities locations | State |  | 20 |  | 20 |
General and administrative expense |  | $ 95 | $ 127 | $ 190 | $ 214
Charity care amount |  | 3,617 | 3,684 | 7,075 | 6,626
Estimated costs of charity care |  | 401 | 407 | 792 | 742
Revenues |  | $ 14,820 | $ 14,435 | $ 29,765 | $ 28,412
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, and revenues are recognized based on charges incurred in relation to total expected charges |
Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of income of federal poverty level eligible for charity care | 400.00% |  |  |  |
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 |

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