Segment and Geographic Area Information - Schedule of Segment Reporting Information to Consolidated Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Assets By Segment [Line Items]
Total Assets	$ 35,742	$ 40,179
Cash and cash equivalents	1,437	1,861	1,939	1,543
Corporate goodwill	3,415	5,170	5,157
Corporate fixed assets, net	17,639	18,947
Operating Segment [Member]
Schedule Of Assets By Segment [Line Items]
Total Assets	29,247	31,912
Intersegment Eliminations [Member]
Schedule Of Assets By Segment [Line Items]
Total Assets	(385)	(444)
Unallocated Amounts (Net of Tax) [Member]
Schedule Of Assets By Segment [Line Items]
Cash and cash equivalents	1,437	1,861
Deferred income taxes	3,410	4,052
Corporate goodwill	518	1,272
Corporate fixed assets, net	879	961
LIFO reserve	(691)	(770)
Other	$ 1,327	$ 1,335