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Earnings Per Share (Details) - $ / shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share	$ 1.21	$ 1.69	$ 4.39	$ 4.89
Average shares outstanding — basic	2,768.4	2,814.4	2,774.8	2,822.0
Potential shares exercisable under stock option plans	129.4	148.4	129.1	148.8
Less: shares which could be repurchased under treasury stock method	(92.8)	(101.2)	(89.0)	(102.3)
Convertible debt shares	2.2	2.7	2.2	2.7
Average shares outstanding — diluted	2,807.2	2,864.3	2,817.1	2,871.2
Diluted earnings per share	$ 1.20	$ 1.66	$ 4.33	$ 4.81

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