Pension Benefits Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Defined Benefit Plan Disclosure [Line Items]
Expected contribution by Company	$ 15
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 4,584	$ 5,028	$ 5,014
Percentage of consolidated plan assets represented by investment in Company comon stock	1.40%	1.30%
Expected contribution by Company	$ 28
Pension [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	800	$ 764
Pension [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,508	4,126
Pension [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	276	138	134
Pension [Member] | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	91	91
Pension [Member] | Cash and Cash Equivalents | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	83	47
Pension [Member] | Cash and Cash Equivalents | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8	44
Pension [Member] | Cash and Cash Equivalents | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Domestic Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	608	556
Pension [Member] | Domestic Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	608	556
Pension [Member] | Domestic Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Domestic Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Foreign Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	109	161
Pension [Member] | Foreign Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	109	161
Pension [Member] | Foreign Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Foreign Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Mutual Fund International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	441	393
Pension [Member] | Mutual Fund International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Mutual Fund International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	441	393
Pension [Member] | Mutual Fund International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Mutual Funds International Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Pension [Member] | Mutual Funds International Debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Pension [Member] | Mutual Funds International Debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Pension [Member] | Mutual Funds International Debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Pension [Member] | Collective Trusts Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	411	594
Pension [Member] | Collective Trusts Domestic Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts Domestic Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	411	594
Pension [Member] | Collective Trusts Domestic Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,130	1,261
Pension [Member] | Collective Trusts International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,130	1,261
Pension [Member] | Collective Trusts International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts Eurozone Sovereign Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10	11
Pension [Member] | Collective Trusts Eurozone Sovereign Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts Eurozone Sovereign Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10	11
Pension [Member] | Collective Trusts Eurozone Sovereign Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts Other International Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	368	534
Pension [Member] | Collective Trusts Other International Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Collective Trusts Other International Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	368	534
Pension [Member] | Collective Trusts Other International Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Limited Partnership
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	455	475
Pension [Member] | Limited Partnership | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Limited Partnership | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	455	475
Pension [Member] | Limited Partnership | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Bonds, corporate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	419	519
Pension [Member] | Bonds, corporate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Bonds, corporate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	419	519
Pension [Member] | Bonds, corporate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0	1
Pension [Member] | Bonds, government
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	157	172
Pension [Member] | Bonds, government | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Bonds, government | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	157	172
Pension [Member] | Bonds, government | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Bonds, other
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	49	59
Pension [Member] | Bonds, other | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Bonds, other | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	49	59
Pension [Member] | Bonds, other | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Buy-in Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	135
Pension [Member] | Buy-in Annuity Contract [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0
Pension [Member] | Buy-in Annuity Contract [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0
Pension [Member] | Buy-in Annuity Contract [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	135	0	0
Pension [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	135	130
Pension [Member] | Real estate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Real estate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Pension [Member] | Real estate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	135	130	125
Pension [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 66	72
Weighted-average target asset allocation	13.00%
Pension [Member] | Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 0	0
Pension [Member] | Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	60	64
Pension [Member] | Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 6	$ 8	$ 8
Pension [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation	21.00%
Pension [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation	66.00%
US High Quality Bonds [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Bond Yield Percentile	40.00%
US High Quality Bonds [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Bond Yield Percentile	90.00%
Canada And Europe [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Bond Yield Percentile	10.00%
Canada And Europe [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Bond Yield Percentile	90.00%