Equity - Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 225	$ 326	$ 926	$ 989	$ 1,808
Other comprehensive income, pre-tax:
Foreign currency translation adjustments, pre-tax	(87)	63	(54)	(28)
Cash flow hedges, pre-tax:
Unrealized gain (loss) on cash flow hedges, pre-tax	(2)	(7)	(26)	5
Reclassification to net income, pre-tax	0	(2)	(11)	(4)
Postretirement and postemployment benefit amounts arising during the period, pre-tax:
Prior service credit (cost), pre-tax	19	(1)	10	(1)
Postretirement and Postemployment Benefits Reclassification To Net Income Pre Tax [Abstract]
Net experience loss, pre-tax	1	1	3	4
Prior service cost, pre-tax	2	4	8	10
Other Comprehensive Income (Loss), before Tax	(67)	58	(70)	(14)
Other comprehensive income (loss), tax (expense) or benefit
Foreign currency translation adjustments, tax (expense) or benefit	(17)		(17)
Cash flow hedges, tax effect:
Unrealized gain (loss) on cash flow hedges, tax (expense) or benefit	4	3	11	0
Reclassification to net earnings - tax (expense) or benefit	0		3
Postretirement and Postemployment Benefit Amounts Arising During Period Tax [Abstract]
Prior service credit (cost), tax (expense) or benefit	(7)		(4)
Postretirement and Postemployment Benefits Reclassification To Net Income Tax [Abstract]
Prior service cost, tax (expense) or benefit	(1)	(1)	(3)	(3)
Other Comprehensive Income (Loss), Tax	(21)	2	(10)	(3)
Other comprehensive income (loss), after tax
Foreign currency translation adjustments, after-tax	(104)	63	(71)	(28)
Cash flow hedges, after-tax:
Unrealized gain (loss) on cash flow hedges, after-tax	2	(4)	(15)	5
Reclassification to net income, after-tax	0	(2)	(8)	(4)
Postretirement and Postemployment Benefit Amounts Arising During Period After Tax [Abstract]
Prior service credit (cost), after-tax	12	(1)	6	(1)
Postretirement and Postemployment Benefits Reclassification To Net Income After Tax [Abstract]
Net experience loss, after-tax	1	1	3	4
Prior service cost, after-tax	1	3	5	7
Other comprehensive income (loss)	(88)	60	(80)	(17)	10
Comprehensive income	$ 137	$ 386	$ 846	$ 972