Other Financial Data (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Dec. 31, 2014	Nov. 03, 2014	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 3,353,000,000	$ 3,141,000,000	$ 3,954,000,000		$ 3,225,000,000
Restricted cash and cash equivalents	63,000,000		63,000,000
Stockholders' Equity [Abstract]
Stock repurchase program, authorized amount				12,000,000,000
Payments for repurchased shares	653,000,000	57,000,000
Number of shares repurchased	9.9
Repurchase of common shares, average cost (in US$ per share)	$ 66.12
Share repurchase authority utilized during period	8,400,000,000
Share repurchase program, available for repurchases	3,600,000,000
Cash dividends paid	$ 75,000,000	$ 79,000,000