Commitments and Contingent Liabilities (Details) In Millions, unless otherwise specified	Sep. 30, 2012 USD ($)	Sep. 30, 2012 PRP site [Member] USD ($)	Sep. 30, 2012 Non- PRP sites [Member] USD ($)	Sep. 30, 2012 Italian Subsidiaries (Member) USD ($)	Sep. 30, 2012 Italian Subsidiaries (Member) EUR (€)	Sep. 30, 2012 Property Lease Guarantee [Member] USD ($)
Commitments And Contingent Liabilities [Line Items]
Estimated future remediation costs		$ 6	$ 7
Assessment of VAT				51	40
Loss Contingency, Estimate of Possible Loss, Interest and Penaltie				71	55
Guarantees related to residual values of leased assets						41
Maximum potential costs related to indemnification agreements for properties sold and businesses divested	$ 11