Restructuring (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		16 Months Ended	3 Months Ended		16 Months Ended	1 Months Ended	3 Months Ended		59 Months Ended	3 Months Ended		59 Months Ended
	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2010 [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Jun. 30, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Jun. 30, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Aug. 31, 2006 Restructuring Activity Fiscal Plan 2007 [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Jun. 30, 2010 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Jun. 30, 2010 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Jun. 30, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]
Restructuring activity
Accrued beginning balance		$ 1	$ 2		$ 4	$ 46			$ 46	$ 60		$ 4	$ 8
Change in estimate		0	0		(1)	(3)			1			0
Payments		0	0		(1)	(22)			(4)	(4)		(1)	(2)
Accretion and other			0			(1)			1			0
Accrued ending balance		1	2	1	2	20	2		44	56	44	3	6	3
Restructuring (Textuals) [Abstract]
Workforce reduction	1,000							3,100
Cumulative amount recognized				$ 2			$ 43				$ 120			$ 220