Asset Impairment and Exit Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Cash payments related to exit costs	$ 44	$ 30	$ 204	$ 230
Restructuring Reserve	52		52		$ 270
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	0	489	0	512
Employee separation costs	0	360	0	383
Asset Impairment Charges	0	129	0	129
European Union [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation costs	0	359	0	359
European Union [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs		488		488
Employee separation costs		359		359
Asset Impairment Charges	$ 0	$ 129	$ 0	$ 129