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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 26, 2013	Apr. 27, 2012	Apr. 29, 2011
Tax expense (benefit) on the unrealized gain/(loss) on investments	$ (19)	$ (38)	$ 130
Net change in retirement obligations	(4)	(130)	3
Tax expense (benefit) on the net unrealized gain (loss) on foreign exchange rate derivatives and interest rate derivative instruments	$ 30	$ 105	$ (183)

Tax effect of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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- Definition

Tax effect of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

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