Restructuring and Related Implementation Charges (Details) (Two Thousand Twelve Restructuring Program [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 One-time Termination Benefits [Member]	Sep. 30, 2013 One-time Termination Benefits [Member]	Sep. 30, 2013 Incremental Depreciation And Asset Impairment [Member]	Sep. 30, 2013 Charges Resulting Directly From Exit Activities [Member]	Sep. 30, 2013 Contract Termination [Member]	Sep. 30, 2013 Contract Termination [Member]	Sep. 30, 2013 Implementation Of New Strategies [Member]	Sep. 30, 2013 Third party Incremental Cost [Member]	Sep. 30, 2013 Third party Incremental Cost [Member]	Sep. 30, 2013 Land and Building [Member]	Sep. 30, 2013 Expected Completion Date 2016 Minimum [Member]	Sep. 30, 2013 Expected Completion Date 2016 Maximum [Member]	Sep. 30, 2013 Expected Completion Date December 2013 Minimum [Member]	Jun. 30, 2013 Expected Completion Date December 2013 Minimum [Member]	Sep. 30, 2013 Expected Completion Date December 2013 Maximum [Member]	Jun. 30, 2013 Expected Completion Date December 2013 Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 30	$ 198		$ 5	$ 91			$ 8	$ 27		$ 11	$ 35	$ 24
Duration Of Restructuring Program			4 years
Restructuring Program Expected Cost Before Tax														1,100	1,250	365	260	390	310
Restructuring Program Expected Cost After Tax														$ 775	$ 875	$ 290	$ 185	$ 305	$ 220
Estimated Percent Of Total Cumulative Pretax Charges Of Implementing 2012 Restructuring Program				50.00%	50.00%	15.00%	20.00%			15.00%
Percent of Restructuring Charges Resulting In Cash Expenditure	75.00%	75.00%