Commitments and Contingent Liabilities (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended				6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 PRP site [Member] USD ($)	Jun. 30, 2013 Non- PRP sites [Member] USD ($)	Jun. 30, 2013 Environmental Issue [Member] USD ($)	Jun. 30, 2013 Indemnification Agreement [Member] USD ($)	Jun. 30, 2013 Property Lease Guarantee [Member] USD ($)	Jun. 30, 2013 Foreign Tax Authority [Member] Italian Subsidiaries (Member) USD ($)	Jun. 30, 2013 Foreign Tax Authority [Member] Italian Subsidiaries (Member) USD ($)	Jun. 30, 2013 Foreign Tax Authority [Member] Italian Subsidiaries (Member) EUR (€)
Commitments And Contingent Liabilities [Line Items]
Estimated future remediation costs					$ 6	$ 7
Site Contingency, Recovery from Third Party of Environmental Remediation Cost						3
Loss Contingency, Damages Sought, Value											98	75
Loss Contingency Accrual, Period Increase										14	20
LegalSettlementCashReceived							15
LegalSettlementCashExpected							1
Gain (Loss) Related to Litigation Settlement							16
Net Income (Loss) Attributable to Parent	133	134	174	203			11			13	14
Loss Contingency, Range of Possible Loss, Maximum								9
Guarantees related to residual values of leased assets									$ 40