Equity - Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Dec. 29, 2012
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 311	$ 351	$ 961
Other comprehensive income, pre-tax:
Foreign currency translation adjustments, pre-tax	(28)	95
Cash flow hedges, pre-tax:
Unrealized gain (loss) on cash flow hedges, pre-tax	11	(8)
Reclassification to net income, pre-tax	0	4
Postretirement and Postemployment Benefits Reclassification To Net Income Pre Tax [Abstract]
Net experience loss, pre-tax	2	1
Prior service cost, pre-tax	3	4
Other Comprehensive Income (Loss), before Tax	(12)	96
Other comprehensive income (loss), tax (expense) or benefit
Foreign currency translation adjustments, tax (expense) or benefit	0	2
Cash flow hedges, tax effect:
Unrealized gain (loss) on cash flow hedges, tax (expense) or benefit	(3)	3
Reclassification to net income, tax (expense) or benefit	0	(1)
Postretirement and Postemployment Benefits Reclassification To Net Income Tax [Abstract]
Net experience loss benefit cost tax	0	0
Prior service cost, tax (expense) or benefit	(1)	(1)
Other Comprehensive Income (Loss), Tax	(4)	3
Other comprehensive income (loss), after tax
Foreign currency translation adjustments, after-tax	(28)	97
Cash flow hedges, after-tax:
Unrealized gain (loss) on cash flow hedges, after-tax	8	(5)
Reclassification to net income, after-tax	0	3
Postretirement and Postemployment Benefits Reclassification To Net Income After Tax [Abstract]
Net experience loss, after-tax	2	1
Prior service cost, after-tax	2	3
Other comprehensive income (loss)	(16)	99	75
Comprehensive income	$ 295	$ 450