Property, Plant and Equipment (Schedule of Property, Plant And Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 32,431	$ 31,826
Building [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	5,283	5,490
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	24,714	24,090
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	671	691
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,763	$ 1,555