Commitments and Contingent Liabilities (Imprelis) (Details) (Imprelis [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2011
Imprelis [Member]
Product Liability Contingency [Line Items]
Product Claims	$ 100	$ 75	$ 175
Intended recovery from insurance carriers	$ 100		$ 100