Objectives And Strategies For Using Derivatives Summary of total and undesignated fair values of derivative instruments (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative
Assets	$ 89	$ 54
Liabilities	132	116
Foreign currency exchange contracts
Derivative
Assets	87	54
Liabilities	104	102
Interest rate contracts
Derivative
Assets	2	0
Liabilities	11	4
Commodity price contracts
Derivative
Assets	0	0
Liabilities	$ 17	$ 10