Pensions and Other Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - Retirement plans - USD ($) $ in Millions	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 23,633	$ 22,254	$ 22,575
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	23,633	22,254
Investments Measured at Net Asset Value(b)	6,159	6,382
Fair Value, Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	11,578	11,501
Fair Value, Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	5,872	4,347
Fair Value, Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	24	24
Fair Value, Measurements, Recurring | Short-term investment funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	797	496
Fair Value, Measurements, Recurring | Short-term investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	145	184
Fair Value, Measurements, Recurring | Short-term investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	652	312
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	2,655	1,767
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	2,655	1,767
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	1,237	1,051
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	1,237	1,050
Fair Value, Measurements, Recurring | Debt instruments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	1
Fair Value, Measurements, Recurring | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	11,445	11,328
Fair Value, Measurements, Recurring | Equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	11,433	11,317
Fair Value, Measurements, Recurring | Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	12	11
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	7,083	7,222
Investments Measured at Net Asset Value(b)	5,767	6,122
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	1,316	1,100
Fair Value, Measurements, Recurring | Commingled funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	24	23
Investments Measured at Net Asset Value(b)	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	24	23
Fair Value, Measurements, Recurring | Other assets
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	392	367
Investments Measured at Net Asset Value(b)	392	260
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	0	107
Fair Value, Measurements, Recurring | Other assets | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 0	$ 0