Equity (Changes in Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Net income	$ 1,229	$ 1,240	$ 1,208
Foreign currency translation adjustments, Pre-tax amount	(105)	(18)	65
Foreign currency translation adjustments, Tax (expense) or benefit	(2)	0	0
Foreign currency translation adjustments, After-tax amount	(107)	(18)	65
Unrealized gain (loss) on cash flow hedges, Pre-tax amount	(51)	51	(6)
Unrealized gain (loss) on cash flow hedges, Tax (expense) or benefit	18	(21)	3
Unrealized gain (loss) on cash flow hedges, After-tax amount	(33)	30	(3)
Reclassification to net earnings, Pre-tax amount	(2)	34	(3)
Reclassification to net earnings, Tax (expense) or benefit	1	(9)	0
Reclassification to net earnings, After-tax amount	(1)	25	(3)
Net experience gain (loss), Pre-tax amount	(728)	(71)	161
Net experience gain (loss), Tax (expense) or benefit	236	30	(72)
Net experience gain (loss), After-tax amount	(492)	(41)	89
Prior service credit (cost), Pre-tax amount	(3)	(8)	(33)
Prior service credit (cost), Tax (expense) or benefit	1	(13)	11
Prior service credit (cost), After-tax amount	(2)	(21)	(22)
Total adjustment to OCI, Pre-tax amount	(747)	101	258
Total adjustment to OCI, Tax (expense) or benefit	203	(49)	(83)
Total adjustment to OCI, After-tax amount	(544)	52	175
Total comprehensive income	685	1,292	1,383
Reclassification to Net Earnings [Member]
Net experience loss, Pre-tax amount	131	102	63
Net experience loss, Tax (expense) or benefit	(47)	(32)	(21)
Net experience loss, After-tax amount	84	70	42
Prior service credit (cost), Pre-tax amount	11	11	11
Prior service credit (cost), Tax (expense) or benefit	(4)	(4)	(4)
Prior service credit (cost), After-tax amount	$ 7	$ 7	$ 7