Economic Hedges (Detail) (Economic Hedging, USD $) In Millions, unless otherwise specified	9 Months Ended											3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Commodity contracts Cost of Sales	Sep. 30, 2013 Commodity contracts Cost of Sales	Sep. 30, 2014 Forecasted Purchases Hedges Currency exchange contracts Cost of Sales	Sep. 30, 2013 Forecasted Purchases Hedges Currency exchange contracts Cost of Sales	Sep. 30, 2014 Forecasted transactions Currency exchange contracts Interest and other expense/(income)	Sep. 30, 2014 Forecasted transactions Currency exchange contracts Selling, general and administrative expenses	Sep. 30, 2013 Forecasted transactions Currency exchange contracts Selling, general and administrative expenses	Sep. 30, 2014 Forecasted Interest Payments Intercompany loans Currency exchange contracts Interest And Other Expense	Sep. 30, 2013 Forecasted Interest Payments Intercompany loans Currency exchange contracts Interest And Other Expense	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Interest rate contracts Interest And Other Expense	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments Interest rate contracts Interest And Other Expense	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of Sales	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of Sales	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Forecasted Purchases Hedges Currency exchange contracts Cost of Sales	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments Forecasted Purchases Hedges Currency exchange contracts Cost of Sales	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Forecasted transactions Currency exchange contracts Interest and other expense/(income)	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Forecasted transactions Currency exchange contracts Selling, general and administrative expenses	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments Forecasted transactions Currency exchange contracts Selling, general and administrative expenses	Sep. 30, 2014 Derivatives Not Designated as Hedging Instruments Forecasted Interest Payments Intercompany loans Currency exchange contracts Interest And Other Expense	Sep. 30, 2013 Derivatives Not Designated as Hedging Instruments Forecasted Interest Payments Intercompany loans Currency exchange contracts Interest And Other Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain / (Loss) Recognized in Earnings	$ 474	$ 106	$ 82	$ 62	$ (11)	$ 36	$ 405	$ (7)	$ 1	$ 5	$ 7	$ 459	$ 42	$ (1)	$ 2	$ 12	$ 28	$ 29	$ 10	$ 419	$ (4)	$ (2)	$ 4	$ 4