Pension Benefits (Change in Projected Benefit Obligation, Plan Assets, and Funding Status) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Amounts recognized in the Consolidated Balance Sheet consist of
Other assets	$ 150,000,000	$ 333,000,000
Other liabilities	(560,000,000)	(265,000,000)
Amounts recognized in accumulated other comprehensive income consist of
Accumulated benefit obligation for all defined benefit pension plans	4,000,000,000	3,600,000,000
Pension [Member]
Change in projected benefit obligation
Beginning of year	3,930,000,000	3,605,000,000
Service cost	96,000,000	88,000,000
Interest cost	209,000,000	200,000,000
Plan participants' contributions	2,000,000	2,000,000
Amendments	3,000,000	8,000,000
Actuarial gain (loss)	365,000,000	241,000,000
Benefits paid	(220,000,000)	(203,000,000)
Curtailment and special termination benefits	0	0
Foreign currency adjustments	(18,000,000)	(11,000,000)
End of year	4,367,000,000	3,930,000,000
Change in plan assets
Fair value beginning of year	3,967,000,000	3,323,000,000
Actual return on plan assets	(33,000,000)	480,000,000
Employer contributions	180,000,000	350,000,000
Plan participants' contributions	2,000,000	2,000,000
Benefits paid, Plan Assets	(173,000,000)	(177,000,000)
Foreign currency adjustments	(12,000,000)	(11,000,000)
Fair value end of year	3,931,000,000	3,967,000,000
Funded status	(436,000,000)	37,000,000
Amounts recognized in the Consolidated Balance Sheet consist of
Other assets	150,000,000	333,000,000
Other current liabilities	(26,000,000)	(43,000,000)
Other liabilities	(560,000,000)	(253,000,000)
Net amount recognized	(436,000,000)	37,000,000
Amounts recognized in accumulated other comprehensive income consist of
Net experience loss	1,907,000,000	1,277,000,000
Prior service cost	85,000,000	96,000,000
Net amount recognized	$ 1,992,000,000	$ 1,373,000,000