Employee Benefits (Components of Company Plan Benefit Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 28	$ 26
Interest cost	51	52
Expected return on plan assets	(92)	(92)
Amortization of unrecognized prior service cost (credit)	4	4
Recognized net loss	36	26
Settlement cost	0	1
Total expense	27	17
Other Nonpension Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6
Interest cost	13	16
Expected return on plan assets	(22)	(22)
Amortization of unrecognized prior service cost (credit)	0	(1)
Recognized net loss	4	5
Total expense	1	4
Postemployment [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2
Interest cost	1	1
Recognized net loss	1	1
Total expense	$ 4	$ 4