Commitments and Contingencies (Unaudited) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jul. 31, 2015	Aug. 29, 2013
Site Contingency [Line Items]
Low-end of the range of reasonably possible future costs for environmental remediation sites		$ 351		$ 351
High-end of the range of reasonably possible future costs for environmental remediation sites		794		794
Accrual for Environmental Remediation Costs		368		368
Financial Arrangements
Standby Unused Letters Of Credit and bank guarantees		236		236
Surety Bond Outstanding		152		152
Operating leases
Rental expense for operating leases, net of immaterial amounts of sublease rental income		75	$ 84	232	$ 229
Revolving Credit Facility [Member] | Five Year Term [Member] [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 1,600	$ 1,800
Credit Facility, Covenant Terms, Maximum Debt to Capitalization Ratio	65.00%
Other Current Liabilities [Member]
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs		111		111
Other Noncurrent Liabilities [Member]
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs		257		257
Inventoried Costs [Member]
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs		58		58
Other Noncurrent Assets [Member]
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs		$ 129		$ 129