Quarterly Financial Data Quarterly Financial Data (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Jun. 29, 2013	Mar. 30, 2013
Quarterly Financial Data [Abstract]
Unusual or infrequent item, net (gain) loss, net of tax	$ 65	$ 39	$ 21	$ 25	$ 171	$ 160	$ 40