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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) State Hospital Surgery_Center | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) State Hospital Surgery_Center | Sep. 30, 2016 USD ($)
Accounting Policies [Abstract] |  |  |  |
Number of owned and operated hospitals | Hospital | 177 |  | 177 |
Number of freestanding surgery centers | Surgery_Center | 119 |  | 119 |
Number of facilities locations | State | 20 |  | 20 |
General and administrative expense | $ | $ 91 | $ 94 | $ 273 | $ 272

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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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