Accumulated Other Comprehensive Income Activity (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 28, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end, beginning balance	$ (44)		$ (44)		$ (48)
Other comprehensive income (loss) before reclassifications	(28)		6		2
Amounts reclassified from accumulated other comprehensive loss	2		(6)		2
Net other comprehensive income (loss)	(26)		0		4
Balance at year-end, ending balance	(70)		(44)		(44)
Other comprehensive income (loss), before reclassifications, other derivative instrument adjustments, deferred tax	0		0		(1)
Other comprehensive income (loss), before reclassifications, unrealized gains on available-for-sale securities, deferred tax	3		2		4
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end, beginning balance	(31)		(32)		(37)
Other comprehensive income (loss) before reclassifications	(41)		1		4
Amounts reclassified from accumulated other comprehensive loss	0		0		1
Net other comprehensive income (loss)	(41)		1		5
Balance at year-end, ending balance	(72)		(31)		(32)
Other Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end, beginning balance	(19)	[1]	(19)	[1]	(18)	[1]
Other comprehensive income (loss) before reclassifications	8	[1]	0	[1]	(2)	[1]
Amounts reclassified from accumulated other comprehensive loss	2	[1]	0	[1]	1	[1]
Net other comprehensive income (loss)	10	[1]	0	[1]	(1)	[1]
Balance at year-end, ending balance	(9)	[1]	(19)	[1]	(19)	[1]
Unrealized Gains (Losses) on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end, beginning balance	6	[2]	7	[2]	7	[2]
Other comprehensive income (loss) before reclassifications	5	[2]	5	[2]	0	[2]
Amounts reclassified from accumulated other comprehensive loss	0	[2]	(6)	[2]	0	[2]
Net other comprehensive income (loss)	5	[2]	(1)	[2]	0	[2]
Balance at year-end, ending balance	$ 11	[2]	$ 6	[2]	$ 7	[2]

[1] We present the portions of other comprehensive income (loss) before reclassifications that relate to other derivative instrument adjustments net of zero deferred taxes for 2014 and 2013, and deferred tax benefits of $1 million for 2012.

[2] We present the portions of other comprehensive income (loss) before reclassifications that relate to unrealized gains (losses) on available-for-sale securities net of deferred taxes of $3 million for 2014, $2 million for 2013 and $4 million for 2012.