Acquisition and Restructuring Costs (Activity Related To Restructuring-Related Accruals) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2012	$ 262
Additional accruals for Business Operations and Information Technology Transformation program	25
Additional accruals for 2012 expense control measures	3	(1)
Payments and adjustments	(184)
Balance as of December 31, 2013	106	262
Employee- Related Costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2012	195
Additional accruals for Business Operations and Information Technology Transformation program	13
Additional accruals for 2012 expense control measures	(4)
Payments and adjustments	(154)
Balance as of December 31, 2013	50
Real Estate Consolidation
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2012	49
Additional accruals for Business Operations and Information Technology Transformation program	13
Additional accruals for 2012 expense control measures	0
Payments and adjustments	(13)
Balance as of December 31, 2013	49
Information Technology Costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2012	5
Additional accruals for Business Operations and Information Technology Transformation program	(1)
Additional accruals for 2012 expense control measures	0
Payments and adjustments	(4)
Balance as of December 31, 2013	0
Asset and Other Write-Offs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2012	13
Additional accruals for Business Operations and Information Technology Transformation program	0
Additional accruals for 2012 expense control measures	7
Payments and adjustments	(13)
Balance as of December 31, 2013	$ 7