Fair Value Measurements (Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	$ 2,294	$ 1,850
Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Investment Committee equity target allocation percentage of pension assets	60.00%
Pension plan assets at fair value	1,408	1,064
Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	169	137
Consumer discretionary [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	125	88
Health care [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	96	70
Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	83	53
Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	78	65
Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	58	61
Consumer staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	55	42
Materials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	25	24
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	33	16
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investment Committee equity target allocation percentage of pension assets	40.00%
Pension plan assets at fair value	829	755
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	17	15
Corporate securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	606	595
Common trust funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	426	367
Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	296	175
Government securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	178	126
Asset-backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	28	10
Cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	20	0
Derivatives and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	1	6
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	739	571
Level 1 [Member] | Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	169	137
Level 1 [Member] | Consumer discretionary [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	125	88
Level 1 [Member] | Health care [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	96	70
Level 1 [Member] | Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	83	53
Level 1 [Member] | Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	78	65
Level 1 [Member] | Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	58	61
Level 1 [Member] | Consumer staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	55	42
Level 1 [Member] | Materials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	25	24
Level 1 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	33	16
Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	17	15
Level 1 [Member] | Corporate securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Common trust funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Government securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Asset-backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Derivatives and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	1,555	1,279
Level 2 [Member] | Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Consumer discretionary [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Health care [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Consumer staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Materials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 2 [Member] | Corporate securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	606	595
Level 2 [Member] | Common trust funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	426	367
Level 2 [Member] | Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	296	175
Level 2 [Member] | Government securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	178	126
Level 2 [Member] | Asset-backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	28	10
Level 2 [Member] | Cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	20	0
Level 2 [Member] | Derivatives and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	1	6
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Consumer discretionary [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Health care [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Consumer staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Materials [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Corporate securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Common trust funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Government securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Asset-backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	0	0
Level 3 [Member] | Derivatives and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets at fair value	$ 0	$ 0