Intangible Assets and Goodwill (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Apr. 04, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 94	$ 77
Accumulated Amortization	56	54
Completed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	54	37
Accumulated Amortization	29	27
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8	8
Accumulated Amortization	4	4
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15	15
Accumulated Amortization	8	8
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17	17
Accumulated Amortization	$ 15	$ 15