Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, Beginning Balance	$ 46	$ 16
Other comprehensive income (loss) before reclassifications	(25)	40
Amounts reclassified from accumulated other comprehensive income	0	(2)
Other comprehensive (loss) income	(25)	38
Accumulated other comprehensive income (loss), net of tax, Ending Balance	21	54
Unrealized gain (loss) on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, Beginning Balance	20	18
Other comprehensive income (loss) before reclassifications	(1)	2
Amounts reclassified from accumulated other comprehensive income	0	(2)
Other comprehensive (loss) income	(1)	0
Accumulated other comprehensive income (loss), net of tax, Ending Balance	19	18
Unrealized gain (loss) on derivative instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, Beginning Balance	0	0
Other comprehensive income (loss) before reclassifications	3	0
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive (loss) income	3	0
Accumulated other comprehensive income (loss), net of tax, Ending Balance	3	0
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, Beginning Balance	26	(2)
Other comprehensive income (loss) before reclassifications	(27)	38
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive (loss) income	(27)	38
Accumulated other comprehensive income (loss), net of tax, Ending Balance	$ (1)	$ 36