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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Number Of Facility Under Construction

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No definition available.

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Carrying amount of the equity interests owned by noncontrolling shareholders, partners, or other equity holders in joint ventures included in the entity's consolidated financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4568740-111683

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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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

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-URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764

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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764

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-URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764

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