Severance and Exit Costs (Tables)

6 Months Ended

Sep. 30, 2011

Severance and Exit Costs [Abstract]

Severance and exit costs activity

Fiscal 2012 Plan	Severance
	(in millions)
Accrued balance at March 31, 2011	$	—
Activity for the period ended September 30, 2011
Expense		44
Payments		(12	)
Accretion and other		—
Accrued balance at September 30, 2011	$	32

				Facilities
Fiscal 2010 Plan	Severance			Abandonment
	(in millions)
Accrued balance at March 31, 2010	$	46		$	2
Activity for the period ended September 30, 2010
Change in estimate		(3	)		—
Payments		(30	)		—
Accretion and other		(1	)		—
Accrued balance at September 30, 2010	$	12		$	2
Accrued balance at March 31, 2011	$	4		$	1
Activity for the period ended September 30, 2011
Change in estimate		—			—
Payments		(2	)		—
Accrued balance at September 30, 2011	$	2		$	1

				Facilities
Fiscal 2007 Plan	Severance			Abandonment
	(in millions)
Accrued balance at March 31, 2010	$	8		$	60
Activity for the period ended September 30, 2010
Change in estimate		1			—
Payments		(3	)		(9	)
Accrued balance at September 30, 2010	$	6		$	51
Accrued balance at March 31, 2011	$	4		$	46
Activity for the period ended September 30, 2011
Change in estimate		—			—
Payments		(1	)		(6	)
Accretion and other		—			1
Accrued balance at September 30, 2011	$	3		$	41