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Relationship With Universal Health Realty Income Trust And Related Party Transactions (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2010 | Dec. 31, 2011 years days | Dec. 31, 2010 | Dec. 31, 2009
Revenue, Major Customer [Line Items] |  |  |  |
Rent expense under the operating leases |  | $ 16.3 | $ 16.2 | $ 16.3
Lease renewal period, years |  | 5 |  |
Notice period on renewal of lease |  | 90 |  |
Period of rights of refusal to leased facilities |  | 180 |  |
Death benefit proceeds |  | 33 |  |
Payments to acquire life insurance policies | 6.0 | 1.4 |  |
Net of tax present value of projected premium funding commitment | 9 |  | 9 |
Universal Health Services Inc [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Payments to acquire life insurance policies |  | 25.0 |  |
Universal Health Realty Income Trust [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Trust outstanding shares held, percentage | 6.20% |  | 6.20% |
Advisory fee from the trust |  | 2.0 | 1.8 | 1.6
Pre-tax share of income from trust |  | 4.6 | 1.0 | 1.1
Share of income included in the share of trust |  | 3.7 |  |
Current ownership percentage of the trust |  | 100.00% |  |
Carrying value of investment in trust | 7.3 | 9.9 | 7.3 |
Market value of investment in trust | 28.8 | 30.7 | 28.8 |
Payments to acquire life insurance policies |  | $ 8.0 |  |
Minimum [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Lease initial terms |  | 13 |  |
Maximum [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Lease initial terms |  | 15 |  |

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