Long-Lived Asset Impairment Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment charges	$ 30	$ 0	$ 30	$ 0
Machinery, Equipment and Buildings | Empire, Nevada and New Orleans, Louisiana
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment charges	16
Machinery, Equipment and Buildings | Gypsum, Ohio
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment charges	2
Facilities
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment charges	$ 12