Property, Plant and Equipment (Schedule of Property, Plant And Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 33,328	$ 32,431
Building [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	5,318	5,283
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	24,990	24,714
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	667	671
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 2,353	$ 1,763