000001 - Document - Document and Entity Information
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020000 - Document - Risk/Return Summary {Unlabeled} - DREYFUS ONE HUNDRED PERCENT US TREASURY MONEY MARKET FUND
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020001 - Schedule - Annual Fund Operating Expenses
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020002 - Schedule - Expense Example {Transposed}
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020003 - Schedule - Annual Total Returns [Bar Chart]
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020004 - Schedule - Average Annual Returns {Transposed}
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020006 - Document - Risk/Return Summary {Unlabeled} - DREYFUS US TREASURY INTERMEDIATE TERM FUND
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020007 - Schedule - Annual Fund Operating Expenses
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020008 - Schedule - Expense Example {Transposed}
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020009 - Schedule - Annual Total Returns [Bar Chart]
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020010 - Schedule - Average Annual Returns {Transposed}
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020012 - Document - Risk/Return Summary {Unlabeled} - DREYFUS US TREASURY LONG TERM FUND
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020013 - Schedule - Annual Fund Operating Expenses
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020014 - Schedule - Expense Example {Transposed}
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020015 - Schedule - Annual Total Returns [Bar Chart]
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020016 - Schedule - Average Annual Returns {Transposed}
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020005 - Disclosure - Risk/Return Detail Data {Elements} - DREYFUS ONE HUNDRED PERCENT US TREASURY MONEY MARKET FUND
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020011 - Disclosure - Risk/Return Detail Data {Elements} - DREYFUS US TREASURY INTERMEDIATE TERM FUND
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020017 - Disclosure - Risk/Return Detail Data {Elements} - DREYFUS US TREASURY LONG TERM FUND
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