Short-term Borrowings and Current Portion of Long-term Debt (Schedule of Short-term Debt) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 10, 2014	May 02, 2013	Sep. 30, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Total short-term borrowings			$ 1,643	$ 1,580
Current portion of long-term debt			72	73
Short-term borrowings and current portion of long-term debt			1,715	1,653
Commercial paper program [Member]
Short-term Debt [Line Items]
Total short-term borrowings			971	292
Revolving credit facility [Member]
Short-term Debt [Line Items]
Total short-term borrowings			0	772
364-day term loan facility [Member]
Short-term Debt [Line Items]
Total short-term borrowings			400	300
Debt instrument, term	364 days	364 days
Other short-term bank loans [Member]
Short-term Debt [Line Items]
Total short-term borrowings			$ 272	$ 216