Other Income Other Income (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 01, 2016 USD ($) $ / shares
Component of Operating Income [Abstract]
Proceeds from sale of marketable securities	$ 265
Marketable securities, realized gain	223
Marketable securities, after-tax realized gain	$ 140
Marketable securities, after-tax gain, per diluted share | $ / shares	$ 0.20