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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests - Additional Information (Detail) (USD $) In Millions, unless otherwise specified |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 Acute Care Hospital Services Las Vegas, Nevada Facility | Sep. 30, 2013 Acute Care Hospital Services Washington, District of Columbia | Sep. 30, 2013 Acute Care Hospital Services Laredo, Texas | Sep. 30, 2013 Behavioral Health Services Philadelphia, Pennsylvania
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Percentage of noncontrolling, minority ownership interests held by outside owners |  |  | 28.00% | 20.00% | 11.00% | 20.00%
Number of facilities |  |  | 5 |  |  |
Redeemable noncontrolling interests | $ 218 | $ 234 |  |  |  |
Noncontrolling interest | $ 52 | $ 53 |  |  |  |

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