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Accounting Policies (Textual) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Accounting Policies (Textual) [Abstract]
Inventories valued using LIFO method (percent)	57.00%us-gaap_PercentageOfLIFOInventory
FIFO method value of inventory in excess of reported	$ 234	$ 216
Antidilutive common stock-based awards excluded from calculation of diluted earnings per share (shares)	361	309	398
Minimum [Member]
Accounting Policies (Textual) [Abstract]
Whiskey aging period (years)	3 years
Minimum [Member] \| Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	20 years
Minimum [Member] \| Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	3 years
Minimum [Member] \| Software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	3 years
Maximum [Member]
Accounting Policies (Textual) [Abstract]
Whiskey aging period (years)	6 years
Maximum [Member] \| Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	40 years
Maximum [Member] \| Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	10 years
Maximum [Member] \| Software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	7 years

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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