Severance and Exit Costs 2 (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	18 Months Ended	1 Months Ended	34 Months Ended		1 Months Ended	77 Months Ended
	Jul. 31, 2011 Restructuring Activity Fiscal Plan 2012 [Member] Employee	Dec. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Employee	Dec. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Dec. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Aug. 31, 2006 Restructuring Activity Fiscal Plan 2007 [Member] Employee	Dec. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Dec. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]
Severance and Exit Costs (Textual) [Abstract]
Workforce reduction	400		1,000			3,100
Cumulative amount recognized		$ 39		$ 43	$ 2		$ 220	$ 118