Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Restructuring and Related Cost [Abstract]
Restructuring costs total	$ 149		$ 200
Employee separation costs	142	7	151
Restructuring fixed asset impairments	7		41
Other restructuring costs			8
Employee Separation Charges [Roll Forward]
Liability balance at beginning of period	89	29	29
Increase in liability (separation charges)	142	7	151
Reduction in liability (payments and other adjustments)	(37)		(91)
Liability balance at end of period	194		89
Gosselies, Belgium facility
Restructuring and Related Cost [Abstract]
Employee separation costs	128
Estimated cash separation costs			300
Employee Separation Charges [Roll Forward]
Increase in liability (separation charges)	$ 128