Other Financial Data (Earnings (Loss) Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Basic earnings (loss) per common share:
Earnings from continuing operations	$ 78	$ 223	$ 163	$ 380
Net earnings	824	258	951	450
Weighted average common shares outstanding, basic (shares)	253.7	269.5	253.8	271.9
Continuing operations (US$ per share)	$ 0.31	$ 0.83	$ 0.64	$ 1.40
Basic earnings per share amount (US$ per share)	$ 3.25	$ 0.96	$ 3.75	$ 1.66
Diluted earnings (loss) per common share:
Earnings from continuing operations, net of tax	78	223	163	380
Net earnings	$ 824	$ 258	$ 951	$ 450
Weighted average common shares outstanding, basic (shares)	253.7	269.5	253.8	271.9
Add effect of dilutive securities:
Share-based awards (in shares)	2.5	5.2	3.4	5.8
Diluted weighted average common shares outstanding (shares)	256.2	274.7	257.2	277.7
Diluted weighted average common shares outstanding (US$ per share)	$ 0.30	$ 0.81	$ 0.63	$ 1.37
Diluted earnings per share amount (US$ per share)	$ 3.22	$ 0.94	$ 3.70	$ 1.62