Additional Information (Schedule of Additional Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Research and development expense	$ 153	$ 136	$ 128
Advertising expense	7	6	5
Interest expense	1,053	1,128	1,220
Interest income	(4)	(2)	(4)
Interest Income (Expense), Net	(1,049)	(1,126)	(1,216)
Rent expense	$ 49	$ 49	$ 63