Income Taxes (Change In Valuation Allowance Against Deferred Tax Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Income Taxes [Abstract]
Balance at beginning of year	$ 36	$ 28	$ 22
Additions charged to income tax expense	12	11	14
Reductions credited to income tax expense	(1)	(2)	(7)
Currency translation adjustments	(1)	(1)	(1)
Balance at end of year	$ 46	$ 36	$ 28