Number of Stock Options and Weighted-average Exercise Prices (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of year	11,641,564	5,839,417	7,082,224
Granted	1,150,577	2,055,942	502,500
Options assumed from merger		5,843,623
Exercised	(2,166,269)	(1,720,507)	(1,603,205)
Forfeited	(181,212)	(376,911)	(142,102)
Outstanding, end of year	10,444,660	11,641,564	5,839,417
Exercisable, end of year	6,853,838	8,100,566	4,364,180
Outstanding, beginning of year	$ 48.69	$ 39.75	$ 37.08
Granted	$ 65.05	$ 60.69	$ 48.46
Options assumed from merger		$ 44.41
Exercised	$ 40.34	$ 34.81	$ 30.13
Forfeited	$ 52.19	$ 54.95	$ 44.65
Outstanding, end of year	$ 52.47	$ 48.69	$ 39.75
Exercisable, end of year	$ 49.74	$ 46.70	$ 38.50