Pension Benefits Plan Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Defined Benefit Plan Disclosure [Line Items]
Expected contribution by Company		$ 16
Pension
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4,544	$ 4,584	$ 5,028
Net Asset Value Excluded From Fair Value By Input	[1]	$ 2,808	$ 2,469
Percentage of consolidated plan assets represented by investment in Company comon stock		1.50%	1.40%
Expected contribution by Company		$ 26
Pension | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		567	$ 800
Pension | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1,038	1,174
Pension | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		131	141	8
Pension | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		66	91
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Cash and Cash Equivalents | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		54	83
Pension | Cash and Cash Equivalents | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		12	8
Pension | Cash and Cash Equivalents | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Domestic Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		482	608
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Domestic Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		482	608
Pension | Domestic Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Domestic Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Foreign Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		32	109
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Foreign Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		31	109
Pension | Foreign Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1	0
Pension | Foreign Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Mutual Fund International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		148	364
Net Asset Value Excluded From Fair Value By Input	[1]	32	33
Pension | Mutual Fund International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Mutual Fund International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		116	331
Pension | Mutual Fund International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Mutual Funds Domestic Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		66	77
Net Asset Value Excluded From Fair Value By Input	[1]	42	53
Pension | Mutual Funds Domestic Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Mutual Funds Domestic Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		24	24
Pension | Mutual Funds Domestic Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		653	411
Net Asset Value Excluded From Fair Value By Input	[1]	653	411
Pension | Collective Trusts Domestic Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Domestic Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Domestic Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1,250	1,130
Net Asset Value Excluded From Fair Value By Input	[1]	1,112	949
Pension | Collective Trusts International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		138	181
Pension | Collective Trusts International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Eurozone Sovereign Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets			10
Net Asset Value Excluded From Fair Value By Input	[1]		10
Pension | Collective Trusts Eurozone Sovereign Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets			0
Pension | Collective Trusts Eurozone Sovereign Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets			0
Pension | Collective Trusts Eurozone Sovereign Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets			0
Pension | Collective Trusts Other International Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		310	368
Net Asset Value Excluded From Fair Value By Input	[1]	310	368
Pension | Collective Trusts Other International Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Other International Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Collective Trusts Other International Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Limited Partnership
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		485	455
Net Asset Value Excluded From Fair Value By Input	[1]	485	455
Pension | Limited Partnership | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Limited Partnership | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Limited Partnership | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, corporate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		452	419
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Bonds, corporate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, corporate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		452	419
Pension | Bonds, corporate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, government
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		158	157
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Bonds, government | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, government | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		158	157
Pension | Bonds, government | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, other
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		41	49
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Bonds, other | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Bonds, other | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		41	49
Pension | Bonds, other | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Buy-in Annuity Contract
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		131	135
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Pension | Buy-in Annuity Contract | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Buy-in Annuity Contract | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Buy-in Annuity Contract | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		131	135	0
Pension | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		117	135
Net Asset Value Excluded From Fair Value By Input	[1]	117	135
Pension | Real estate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Real estate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Real estate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		153	66
Net Asset Value Excluded From Fair Value By Input	[1]	57	55
Pension | Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension | Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		96	5
Pension | Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 0	$ 6	$ 8
Pension | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		20.00%
Pension | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		61.00%
Pension | Real Estate And Other
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		19.00%
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%

[1] (a) Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.