Fair Value (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Sep. 30, 2011	Oct. 01, 2010	Sep. 30, 2011	Oct. 01, 2010	Apr. 01, 2011
Liabilities:
Goodwill, impairment charge	$ 2,685	$ 0	$ 2,685	$ 0
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net of current maturities	2,478		2,478		2,409
Accounts receivable with customers involved in bankruptcy proceedings	15		15
Allowance for doubtful accounts with customers involved in bankruptcy proceedings	8		8
Fair Value [Member]
Assets:
Money market funds	346		346		556
Time deposits	78		78		241
Short-term investments	6		6		10
Derivative assets	2		2		9
Total assets	432		432		816
Liabilities:
Derivative liabilities	9		9		4
Total liabilities	9		9		4
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net of current maturities	2,619		2,619		2,587
Level 1 [Member]
Assets:
Money market funds	346		346		556
Time deposits	78		78		241
Short-term investments	6		6		10
Derivative assets	0		0		0
Total assets	430		430		807
Liabilities:
Derivative liabilities	0		0		0
Total liabilities	0		0		0
Level 2 [Member]
Assets:
Money market funds	0		0		0
Time deposits	0		0		0
Short-term investments	0		0		0
Derivative assets	2		2		9
Total assets	2		2		9
Liabilities:
Derivative liabilities	9		9		4
Total liabilities	9		9		4
Level 3 [Member]
Assets:
Money market funds	0		0		0
Time deposits	0		0		0
Short-term investments	0		0		0
Derivative assets	0		0		0
Total assets	0		0		0
Liabilities:
Derivative liabilities	0		0		0
Total liabilities	0		0		0
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net of current maturities	$ 2,478		$ 2,478		$ 2,409

Balance of accounts receivable held by the company with customers that are involved in bankruptcy proceedings.

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This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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