Severance and Exit Costs (Tables)

9 Months Ended

Dec. 31, 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 nine months ended December 31, 2011
Expense		49
Change in estimate		(5	)
Payments		(25	)
Accretion and other		—
Accrued balance at December 31, 2011	$	19

Fiscal 2010 Plan	Severance			Facilities Abandonment
	(in millions)
Accrued balance at March 31, 2010	$	46		$	2
Activity for the nine months ended December 31, 2010
Change in estimate		(3	)		—
Payments		(34	)		—
Accretion and other		(1	)		—
Accrued balance at December 31, 2010	$	8		$	2
Accrued balance at March 31, 2011	$	4		$	1
Activity for the nine months ended December 31, 2011
Change in estimate		(1	)		—
Payments		(3	)		—
Accrued balance at December 31, 2011	$	—		$	1

Fiscal 2007 Plan	Severance			Facilities Abandonment
	(in millions)
Accrued balance at March 31, 2010	$	8		$	60
Activity for the nine months ended December 31, 2010
Change in estimate		1			1
Payments		(4	)		(14	)
Accretion and other		—			1
Accrued balance at December 31, 2010	$	5		$	48
Accrued balance at March 31, 2011	$	4		$	46
Activity for the nine months ended December 31, 2011
Change in estimate		—			—
Payments		(2	)		(8	)
Accretion and other		—			1
Accrued balance at December 31, 2011	$	2		$	39