Restructuring Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	$ 154	$ 0	$ 283	$ 0
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	21		119
Payments for Restructuring			81
Asset impairment charges
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	117		138
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	16		26
Payments for Restructuring			12
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges			$ 145