Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Detail) (Fair value, measurements, recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 29, 2013		Dec. 29, 2012
Assets:
Cash equivalents, consisting primarily of money market accounts and short-term certificates of deposit	$ 106,896		$ 189,381
Marketable trading securities (a)	49,344	[1]	46,938	[1]
Derivative assets	20,776		2,897
Total assets at fair value	177,016		239,216
Liabilities:
Derivative liabilities	1,484		3,776
Total liabilities at fair value	1,484		3,776
Level 1 [Member]
Assets:
Cash equivalents, consisting primarily of money market accounts and short-term certificates of deposit	106,896		189,381
Marketable trading securities (a)	49,344	[1]	46,938	[1]
Total assets at fair value	156,240		236,319
Level 2 [Member]
Assets:
Derivative assets	20,776		2,897
Total assets at fair value	20,776		2,897
Liabilities:
Derivative liabilities	1,484		3,776
Total liabilities at fair value	$ 1,484		$ 3,776

[1] Included in other current assets in our consolidated balance sheet.