Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014
Income Taxes [Abstract]
Effective income tax rate	27.70%	27.40%	28.60%
Uncertain tax positions classified as a net current liability	$ 6		$ 6
Projected additions	8		8
Unrecognized tax benefits that would affect the Company's effective income tax rate	$ 61		$ 61