Commitments and Contingent Liabilities (Imprelis) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		18 Months Ended
	Dec. 31, 2012 plantiffs actions	Dec. 31, 2011	Dec. 31, 2012 plantiffs actions
Product Liability Contingency [Line Items]
Intended recovery from insurance carriers	$ 100		$ 100
Insurance program limits	725		725
Imprelis [Member]
Product Liability Contingency [Line Items]
Individual actions filed	80		80
Plaintiffs filed	180		180
Plaintiffs' attorney fees to pay per proposed settlement	7		7
Product claims	575	175	750
Product claims upper range	$ 900		$ 900