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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests - Additional Information (Detail) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 USD ($) Facility | Dec. 31, 2014 USD ($)
Noncontrolling Interest [Line Items] |  |
Redeemable non-controlling interest balances | $ 251 | $ 240
Non-controlling interest balances | $ 60 | $ 55
Acute Care Hospital Services | Las Vegas, Nevada |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 28.00% |
Acute care facilities with outside owners holding non-controlling minority interest | Facility | 5 |
Number of additional facility currently under construction | Facility | 1 |
Acute Care Hospital Services | Washington, District of Columbia |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 20.00% |
Acute Care Hospital Services | Laredo, Texas |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 11.00% |
Behavioral Health Services | Philadelphia, Pennsylvania |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 20.00% |

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- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 + Details
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