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Subsequent Event (Notes)	6 Months Ended
Subsequent Event (Notes)	Oct. 31, 2015
Subsequent Event [Abstract]
Subsequent Event	Subsequent Event As announced on November 19, 2015, our Board of Directors increased our quarterly cash dividend on our Class A and Class B common stock from $0.315 per share to $0.340 per share. Stockholders of record on December 3, 2015, will receive the cash dividend on December 30, 2015.