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Financing Arrangement (Schedule Of Interest Expense Related To Notes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Debt Instruments [Abstract]
Amortization of debt discount	$ 5	$ 5
Amortization of debt issuance costs	1	1
Coupon interest expense	1	1
Total interest expense	$ 7	$ 7

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

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