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Fair Value Measurements Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Mar. 31, 2012
Fair Value Measurements [Abstract] |  |  |
Risk Adjusted Interest Rate | 4.80% | 7.60% |
Long-term Debt, Fair Value | $ 412 | $ 324 | $ 428

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | uvv_FairValueMeasurementsAbstract
Namespace Prefix: | uvv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Risk Adjusted Interest Rate + References No definition available. + Details
Name: | uvv_RiskAdjustedInterestRate
Namespace Prefix: | uvv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration