Summary of Activity Related to Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Balance at beginning of year	$ 273.6	$ 30.3	$ 47.8
Adjustment for 2010 Merger and acquisitions		318.1
Additions based on tax positions related to current year	46.3	18.4	1.4
Additions based on tax positions related to prior years	26.7	0.7	2.3
Reductions based on tax positions related to prior years	(97.1)	(36.3)	(10.6)
Settlements	(22.4)	(41.0)	(2.3)
Statute of limitations expirations	(12.9)	(16.6)	(8.3)
Balance at end of year	$ 214.2	$ 273.6	$ 30.3

Unrecognized Tax Benefits, Increase, Resulting From Other

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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.

+ References

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

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