Pension Benefits (Components of Pension Expense) (Details) (Pension [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Service cost	$ 96	$ 88
Interest cost	209	200
Pension Expense	107	99	63
Estimated net experience loss for defined benefit pension plans, expected to be amortized	144
Estimated net prior service cost for defined benefit pension plans, expected to be amortized	14
401 (k) expense	36	37	37
Defined Benefit Plans [Member]
Service cost	96	88	79
Interest cost	209	200	196
Expected return on plan assets	(369)	(316)	(315)
Amortization of unrecognized prior service cost	14	14	13
Recognized net loss	106	81	46
Curtailment and special termination benefits - net loss	16	0	6
Pension Expense	72	67	25
Defined Contribution Plans [Member]
Pension Expense	$ 35	$ 32	$ 38