Debt and Credit Agreements (Long-term Debt Instruments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011		Dec. 31, 2010
Debt Instrument [Line Items]
Total Long-term Debt Maturities (including current portion)	$ 9,241		$ 8,664
Less Debt Due within One Year	(507)		(613)
Long-term Debt (excluding current portion)	8,734		8,051
Notes Payable [Member]
Debt Instrument [Line Items]
Total Long-term Debt Maturities (including current portion)	8,486		7,817
Average Interest Rates (in hundredths)	6.10%
Equipment Obligations [Member]
Debt Instrument [Line Items]
Total Long-term Debt Maturities (including current portion)	741		823
Average Interest Rates (in hundredths)	7.10%
Capital Leases [Member]
Debt Instrument [Line Items]
Total Long-term Debt Maturities (including current portion)	10		15
Average Interest Rates (in hundredths)	6.30%
Convertible Debt [Member]
Debt Instrument [Line Items]
Total Long-term Debt Maturities (including current portion)	4	[1]	9	[1]
Average Interest Rates (in hundredths)	1.00%	[1]
Net Discount			$ 1

[1] Convertible debentures are net of $1 million discount in 2010.