Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014	Jan. 03, 2015
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 364		$ 364		$ 328
Accrued interest and penalties	$ 50		$ 50		$ 44
Effective income tax rate reconciliation, percent	17.60%	7.20%	12.70%	11.50%
Special charges, acquisition-related costs, adjustments to contingent consideration liabilities and discrete tax items	1.60%	12.00%	4.20%	7.70%