Employee Benefit Plans (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Qualified Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	$ 6	$ 6	$ 19	$ 18
Interest cost on projected benefit obligation	20	20	60	60
Expected return on plan assets	(19)	(19)	(56)	(56)
Amortization of prior service costs	1	1	2	2
Amortization of actuarial net loss	5	5	15	15
Benefit expense	13	13	40	39
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements			3	4
Amount of voluntary, discretionary contributions				30
Supplemental Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	0	0	1	1
Interest cost on projected benefit obligation	0	0	1	1
Expected return on plan assets	0	0	0	0
Amortization of prior service costs	1	1	2	2
Amortization of actuarial net loss	1	0	1	1
Benefit expense	2	1	5	5
Total Defined Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	6	6	20	19
Interest cost on projected benefit obligation	20	20	61	61
Expected return on plan assets	(19)	(19)	(56)	(56)
Amortization of prior service costs	2	2	4	4
Amortization of actuarial net loss	6	5	16	16
Benefit expense	15	14	45	44
Postretirement Benefits [Member]
Components of benefit expense [Abstract]
Service costs - benefits earned during the period	0	0	1	1
Interest cost on projected benefit obligation	1	2	4	5
Expected return on plan assets	0	0	0	0
Amortization of prior service costs	0	0	(1)	(1)
Amortization of actuarial net loss	0	0	0	0
Benefit expense	$ 1	$ 2	$ 4	$ 5