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Lease Commitments - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 Facility | Dec. 31, 2012 | Dec. 31, 2011
Leases Disclosure [Line Items] |  |  |
Number of hospital facilities | 4 |  |
Additional capital lease obligations incurred | $ 0 | $ 0 | $ 0

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- Details
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Balance Type: | na
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- Definition Number of hospital facilities + References No definition available. + Details
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Namespace Prefix: | uhs_
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Balance Type: | na
Period Type: | duration

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- Definition The increase during the period in capital lease obligations due to entering into new capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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