Stock-Based Incentive Compensation Plans (Details) (Share-based Compensation, Allocation of Recognized Period Costs) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 81	$ 91	$ 97
Cost of Sales
Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	3	5	8
Research and Development Expense
Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	44	48	52
Selling, General and Administrative Expenses
Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 34	$ 38	$ 37