(7) Bill and Hold (Detail) (USD $) In Millions, unless otherwise specified	24 Months Ended
	Apr. 01, 2014 T	Jun. 30, 2012
Stockpiling Coal for Customers	Two
Tons of Coal Agreed to Store Per Customer	250,000
Tons of Coal Stored	73,000
Revenue from Bill and Hold (in Dollars)		$ 3