Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 317		$ 317		$ 315
Accrued interest and penalties	$ 43		$ 43		$ 37
Effective Income Tax Rate Reconciliation, Percent	7.20%	14.86486%	11.48148%	11.29771%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	12.00%	6.20%	7.70%	7.70%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent	(1.20%)		(1.20%)	(2.10%)