Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 30, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits that may favorably effect the effective income tax rate	$ 15
Amount of unrecognized tax benefits that will be resolved over next twelve months	4
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of the year	20	50
Additions based on tax positions related to current year	1	3
Additions based on tax positions related to prior years	10	17
Reductions based on tax positions related to prior years	(3)	(41)
Settlements with taxing authorities	(5)	0
Lapse of statute of limitations	(1)	(9)
Balance at end of the year	$ 22	$ 20

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- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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- Definition

The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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