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Condensed Consolidated Statement Of Changes In Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended
	Oct. 29, 2011
Condensed Consolidated Statement Of Changes In Shareholders' Equity [Abstract]
Unrealized gain (loss) on investments, tax	$ 9
Unrealized gain (loss) on interest rate derivative, tax	$ 18
Dividends paid, per share	$ 0.75

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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- Definition

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.

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- Definition

The distribution amount per share for all classes of units.

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