Financing Arrangement (Tables)

6 Months Ended

Sep. 30, 2011

Financing Arrangement [Abstract]

Carrying Values Of Liability And Equity Components Of Notes

	As of September 30, 2011
Principal amount of Notes	$	633
Unamortized discount of the liability component		(104	)
Net carrying amount of Notes	$	529
Equity component, net	$	105

Schedule Of Interest Expense Related To Notes

	SixMonths Ended September 30, 2011
Amortization of debt discount	$	4
Amortization of debt issuance costs		1
Coupon interest expense		1
Total interest expense related to Notes	$	6