Property, Plant And Equipment (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 1,844	$ 1,811	$ 1,675
Interest capitalized	87	74	57
Rental expense for leased properties	287	276	270
Minimum rental payments under capital leases, total	134
Minimum rental payments under operating leases with initial or remaining terms of one year or more, total	1,401
Sublease payments under operating lease	14
Property, plant and equipment included in accounts payable	213	234
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 1,338	$ 1,248	$ 1,119