Employee Benefit Plans (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Components of benefit expense [Abstract]
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements			$ 3	$ 3
Amount of voluntary, discretionary contributions				15
Qualified Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	7	6	13	12
Interest cost on projected benefit obligation	20	20	40	40
Expected return on plan assets	(18)	(18)	(37)	(37)
Amortization of prior service costs	0	0	1	1
Amortization of actuarial net loss	5	5	10	10
Benefit expense	14	13	27	26
Supplemental Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	0	1	1	1
Interest cost on projected benefit obligation	1	0	1	1
Expected return on plan assets	0	0	0	0
Amortization of prior service costs	0	0	1	1
Amortization of actuarial net loss	0	1	0	1
Benefit expense	1	2	3	4
Total Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	7	7	14	13
Interest cost on projected benefit obligation	21	20	41	41
Expected return on plan assets	(18)	(18)	(37)	(37)
Amortization of prior service costs	0	0	2	2
Amortization of actuarial net loss	5	6	10	11
Benefit expense	15	15	30	30
Postretirement Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	1	1	1	1
Interest cost on projected benefit obligation	1	1	3	3
Expected return on plan assets	0	0	0	0
Amortization of prior service costs	(1)	(1)	(1)	(1)
Amortization of actuarial net loss	0	0	0	0
Benefit expense	$ 1	$ 1	$ 3	$ 3