Summary of Significant Accounting Policies (Tables)

3 Months Ended

Sep. 30, 2012

Summary of Significant Accounting Policies [Abstract]

Estimated useful lives of property, plant and equipment

Property, plant, and equipment are recorded at cost. Depreciation is calculated using the straight-line method based on the estimated useful lives of assets. The estimated useful lives of property, plant, and equipment are as follows:

	Range of
	Useful Lives
Asset type:
Land improvements and land use rights		20 to 36 years
Buildings		35 to 40 years
Manufacturing equipment		5 to 25 years
Furnaces		10 to 20 years
Other		2 to 5 years