Pensions and Other Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - Retirement plans - USD ($) $ in Millions	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 28,404	$ 23,633	$ 22,254
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	28,404	23,633
Investments Measured at Net Asset Value	6,436	6,159
Fair Value, Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	14,277	11,578
Fair Value, Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	7,435	5,872
Fair Value, Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	256	24
Fair Value, Measurements, Recurring | Short-term investment funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	856	797
Fair Value, Measurements, Recurring | Short-term investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	429	145
Fair Value, Measurements, Recurring | Short-term investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	427	652
Fair Value, Measurements, Recurring | Short-term investment funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Government and agency securities
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	3,094	2,655
Fair Value, Measurements, Recurring | Government and agency securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Government and agency securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	3,094	2,655
Fair Value, Measurements, Recurring | Government and agency securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Debt instruments
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	2,013	1,237
Fair Value, Measurements, Recurring | Debt instruments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Debt instruments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	2,013	1,237
Fair Value, Measurements, Recurring | Debt instruments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	13,848	11,445
Fair Value, Measurements, Recurring | Equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	13,848	11,433
Fair Value, Measurements, Recurring | Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	12
Fair Value, Measurements, Recurring | Equity securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	7,995	7,083
Investments Measured at Net Asset Value	6,158	5,767
Fair Value, Measurements, Recurring | Commingled funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Commingled funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	1,780	1,316
Fair Value, Measurements, Recurring | Commingled funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	57	0
Fair Value, Measurements, Recurring | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	199	24
Investments Measured at Net Asset Value	0	0
Fair Value, Measurements, Recurring | Insurance contracts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Insurance contracts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Insurance contracts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	199	24
Fair Value, Measurements, Recurring | Other assets
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	399	392
Investments Measured at Net Asset Value	278	392
Fair Value, Measurements, Recurring | Other assets | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Other assets | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	121	0
Fair Value, Measurements, Recurring | Other assets | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 0	$ 0