Kellogg (K) 10-K 24 Feb 20 2019 FY Annual report Financial data

Cover Page Document

Cover Page Document - USD ($) $ / shares in Units, $ in Billions	12 Months Ended
	Dec. 28, 2019	Jan. 25, 2020	Jun. 29, 2019
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 28, 2019
Document Transition Report	false
Entity File Number	1-4171
Entity Registrant Name	Kellogg Company
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-0710690
Entity Address, Address Line One	One Kellogg Square
Entity Address, City or Town	Battle Creek
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49016-3599
City Area Code	269
Local Phone Number	961-2000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 14.7
Entity Common Stock, Shares Outstanding		342,054,365
Documents Incorporated by Reference [Text Block]	Parts of the registrant’s Proxy Statement for the Annual Meeting of Shareowners to be held on April 24, 2020 are incorporated by reference into Part III of this Report.
Closing price per share of common stock			$ 53.57
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Central Index Key	0000055067
Current Fiscal Year End Date	--12-28
Common stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $.25 par value per share
Trading Symbol	K
Security Exchange Name	NYSE
1.750% Senior Notes Due 2021
Entity Information [Line Items]
Title of 12(b) Security	1.750% Senior Notes due 2021
Trading Symbol	K 21
Security Exchange Name	NYSE
0.800% Senior Notes Due 2022
Entity Information [Line Items]
Title of 12(b) Security	0.800% Senior Notes due 2022
Trading Symbol	K 22A
Security Exchange Name	NYSE
1.000% Senior Notes Due 2024
Entity Information [Line Items]
Title of 12(b) Security	1.000% Senior Notes due 2024
Trading Symbol	K 24
Security Exchange Name	NYSE
1.250% Senior Notes Due 2025
Entity Information [Line Items]
Title of 12(b) Security	1.250% Senior Notes due 2025
Trading Symbol	K 25
Security Exchange Name	NYSE

Consolidated Statement of Incom

Consolidated Statement of Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Statement [Abstract]
Net sales	$ 13,578	$ 13,547	$ 12,854
Cost of goods sold	9,197	8,821	8,155
Selling, general and administrative expense	2,980	3,020	3,312
Operating profit	1,401	1,706	1,387
Interest expense	284	287	256
Other income (expense), net	188	(90)	526
Income before income taxes	1,305	1,329	1,657
Income taxes	321	181	410
Earnings (loss) from unconsolidated entities	(7)	196	7
Net income	977	1,344	1,254
Net income (loss) attributable to noncontrolling interests	17	8	0
Net income attributable to Kellogg Company	$ 960	$ 1,336	$ 1,254
Basic	$ 2.81	$ 3.85	$ 3.61
Diluted	$ 2.80	$ 3.83	$ 3.58

Comprehensive Income Statement

Comprehensive Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 977	$ 1,344	$ 1,254
Other comprehensive income (loss), pre-tax:
Foreign currency translation adjustment before tax	100	5	(34)
Cash flow hedges, pre-tax:
Unrealized gain (loss) on cash flow hedges, pre-tax	5	3	0
Reclassifications to net income, pre-tax	4	8	9
Postretirement and postemployment benefit amounts arising during the period, pre-tax:
Net experience gain (loss)	(16)	(8)	44
Prior service credit (cost)	3	1	0
Postretirement and postemployment benefits reclassification to net income, pre-tax:
Net experience (gain) loss, pre-tax	(5)	(5)	0
Prior service (credit) cost, pre-tax	(1)	0	1
Available-for-sale securities, pre-tax
Unrealized gain (loss) on available-for-sale securities, pre-tax	4	0	0
Reclassification to net income on available-for-sale securities, pre-tax	(4)	0	0
Other comprehensive income (loss), pre-tax	90	4	20
Other comprehensive income (loss), tax (expense) benefit:
Foreign currency translation adjustments tax (expense) benefit	(19)	(53)	113
Cash flow hedges, tax (expense) benefit:
Unrealized gain (loss) on cash flow hedges, tax (expense) benefit	(1)	(1)	0
Reclassifications to net income, tax (expense) benefit	(1)	(2)	(3)
Postretirement and postemployment benefit amounts arising during the period, tax (expense) benefit:
Net experience gain (loss), tax (expense) benefit	5	1	(12)
Prior service credit (cost), tax (expense) benefit	(1)	0	0
Postretirement and postemployment benefits reclassification to net income, tax (expense) benefit:
Net experience (gain) loss, tax (expense) benefit	1	1	0
Prior service (credit) cost, tax (expense) benefit	0	0	0
Available-for-sale securities, tax (expense) benefit
Unrealized gain (loss) on available-for-sale securities, tax (expense) benefit	0	0	0
Reclassification to net income on available-for-sale securities, tax (expense) benefit	0	0	0
Other comprehensive income (loss), tax (expense) benefit	(16)	(54)	98
Other comprehensive income (loss), after-tax
Foreign currency translation adjustments after tax	81	(48)	79
Cash flow hedges, after-tax:
Unrealized gain (loss) on cash flow hedges, after-tax	4	2	0
Reclassification to net income, after-tax	3	6	6
Postretirement and postemployment benefit amounts arising during the period, after-tax
Net experience gain (loss), after tax	(11)	(7)	32
Prior service credit (cost), after-tax	2	1	0
Postretirement and postemployment benefits reclassification to net income, after-tax
Net experience loss, after-tax	(4)	(4)	0
Prior service cost, after-tax	(1)	0	1
Available-for-sale securities, after-tax
Unrealized gain (loss) on available-for-sale securities, after-tax	4	0	0
Reclassification to net income on available-for-sale securities, after-tax	(4)	0	0
Other comprehensive income (loss)	74	(50)	118
Comprehensive income	1,051	1,294	1,372
Net income (loss) attributable to noncontrolling interests	17	8	0
Other comprehensive income (loss) attributable to noncontrolling interests	0	(7)	0
Comprehensive income attributable to Kellogg Company	$ 1,034	$ 1,293	$ 1,372

Consolidated Balance Sheet Stat

Consolidated Balance Sheet Statement - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Assets, Current [Abstract]
Cash and cash equivalents	$ 397	$ 321
Accounts receivable, net	1,576	1,375
Inventories	1,226	1,330
Other current assets	232	131
Total current assets	3,431	3,157
Property, net	3,612	3,731
Operating lease, right-of-use assets	541	0
Goodwill	5,861	6,050
Other intangibles, net	2,576	3,361
Investment in unconsolidated entities	404	413
Other Assets	1,139	1,068
Total assets	17,564	17,780
Liabilities, Current [Abstract]
Current maturities of long-term debt	620	510
Notes payable	107	176
Accounts payable	2,387	2,427
Current operating lease liabilities	114	0
Other current liabilities	1,550	1,416
Total current liabilities	4,778	4,529
Long-term debt	7,195	8,207
Operating lease liabilities	433	0
Deferred income taxes	596	730
Pension liability	705	651
Other liabilities	543	504
Commitments and contingencies
Equity [Abstract]
Common stock, $.25 par value, 1,000,000,000 shares authorized Issued: 420,829,201 shares in 2019 and 420,666,780 shares in 2018	105	105
Capital in excess of par value	921	895
Retained earnings	7,859	7,652
Treasury stock, at cost 79,286,171 shares in 2019 and 76,801,314 shares in 2018	(4,690)	(4,551)
Accumulated other comprehensive income (loss)	(1,448)	(1,500)
Total Kellogg Company equity	2,747	2,601
Noncontrolling interests	567	558
Total equity	3,314	3,159
Total liabilities and equity	$ 17,564	$ 17,780

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) Consolidated Balance Sheet - $ / shares	Dec. 28, 2019	Dec. 29, 2018
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.25	$ 0.25
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	420,829,201	420,666,780
Treasury Stock, Shares	79,286,171	76,801,314

Statement of Shareholders' Equi

Statement of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common stock	Capital in excess of par value	Retained earnings	Treasury stock	Accumulated other comprehensive income (loss)	Total Kellogg Company equity	Non- controlling interests
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2016	$ 1,907							$ 16
Balance, in shares at Dec. 31, 2016		420			69
Balance at Dec. 31, 2016		$ 105	$ 806	$ 6,552	$ (3,997)	$ (1,575)	$ 1,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (516)				$ (516)		(516)
Common stock repurchases (in shares)	7				7
Net income (loss)	$ 1,254			1,254			1,254	0
Dividends declared ($2.26, $2.20, $2.12 per share for 2019, 2018 and 2017 respectively)	(736)			(736)			(736)
Other comprehensive income (loss)	118					118	118	0
Stock compensation	66		66				66
Stock options exercised and other	101		6	(1)	$ 96		101
Stock options exercised and other (in shares)		1			(1)
Balance, in shares at Dec. 30, 2017		421			75
Balance at Dec. 30, 2017		$ 105	878	7,069	$ (4,417)	(1,457)	2,178
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 30, 2017	2,194							16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (320)				$ (320)		(320)
Common stock repurchases (in shares)	5				5
Net income (loss)	$ 1,344			1,336			1,336	8
Acquisition of noncontrolling interest	552						0	552
Dividends declared ($2.26, $2.20, $2.12 per share for 2019, 2018 and 2017 respectively)	(762)			(762)			(762)
Distributions to noncontrolling interest	(11)						0	(11)
Other comprehensive income (loss)	(50)					(43)	(43)	(7)
Stock compensation	59		59				59
Stock options exercised and other	153		(42)	9	$ 186		153
Stock options exercised and other (in shares)		0			(3)
Balance, in shares at Dec. 29, 2018		421			77
Balance at Dec. 29, 2018	2,601	$ 105	895	7,652	$ (4,551)	(1,500)	2,601
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 29, 2018	3,159							558
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (220)				$ (220)		(220)
Common stock repurchases (in shares)	4				4
Net income (loss)	$ 977			960			960	17
Sale of subsidiary shares to noncontrolling interest	1						0	1
Dividends declared ($2.26, $2.20, $2.12 per share for 2019, 2018 and 2017 respectively)	(769)			(769)			(769)	0
Distributions to noncontrolling interest	(9)						0	(9)
Other comprehensive income (loss)	74					74	74	0
Reclassification of tax effects relating to U.S. Tax Reform	0			22		(22)	0
Stock compensation	56		56				56
Stock options exercised and other	45		(30)	(6)	$ 81		45
Stock options exercised and other (in shares)		0			(2)
Balance, in shares at Dec. 28, 2019		421			79
Balance at Dec. 28, 2019	2,747	$ 105	$ 921	$ 7,859	$ (4,690)	$ (1,448)	$ 2,747
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 28, 2019	$ 3,314							$ 567

Statement of Shareholders' Eq_2

Statement of Shareholders' Equity (Parenthetical) Statement of Shareholders' Equity - $ / shares	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared per share	$ 2.26	$ 2.20	$ 2.12

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Operating Activities
Net income	$ 977	$ 1,344	$ 1,254
Adjustments to reconcile net income to operating cash flows
Depreciation and amortization	484	516	481
Postretirement benefit plan expense (benefit)	(89)	170	(427)
Deferred income taxes	47	46	(58)
Stock compensation	56	59	66
Multi-employer pension plan exit liability	132	7	26
Gain from unconsolidated entities, net	0	(200)	0
Noncurrent income taxes payable	(35)	(23)	144
Other	(1)	(47)	1
Tax payment related to divestiture	(255)	0	0
Postretirement benefit plan contributions	(28)	(287)	(44)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(145)	76	(1,300)
Inventories	2	(86)	80
Accounts payable	(9)	115	193
All other current assets and liabilities	40	(154)	(13)
Net cash provided by (used in) operating activities	1,176	1,536	403
Investing activities
Additions to properties	(586)	(578)	(501)
Collections of deferred purchase price on securitized trade receivables	0	0	1,243
Acquisitions, net of cash acquired	(8)	(28)	(592)
Divestiture	1,332	0	0
Investments in unconsolidated entities	0	(389)	0
Acquisition of cost method investments	(1)	(8)	(7)
Purchases of available-for-sale securities	(18)	0	0
Sale of available-for-sale securities	83	0	0
Other	(28)	55	6
Net cash provided by (used in) investing activities	774	(948)	149
Financing activities
Net increase (reduction) of notes payable, with maturities less than or equal to 90 days	(18)	(264)	153
Issuances of notes payable, with maturities greater than 90 days	62	62	17
Reductions of notes payable, with maturities greater than 90 days	(69)	(23)	(238)
Issuances of long-term debt	80	993	1,251
Reductions of long-term debt	(1,009)	(408)	(632)
Debt redemption costs	(17)	0	0
Net issuances of common stock	64	167	97
Common stock repurchases	(220)	(320)	(516)
Cash dividends	(769)	(762)	(736)
Other	(9)	(11)	0
Net cash provided by (used in) financing activities	(1,905)	(566)	(604)
Effect of exchange rate changes on cash and cash equivalents	31	18	53
Increase (decrease) in cash and cash equivalents	76	40	1
Cash and cash equivalents at beginning of period	321	281	280
Cash and cash equivalents at end of period	397	321	281
Supplemental cash flow disclosures:
Interest paid	284	280	258
Income taxes paid	537	188	352
Supplemental cash flow disclosures of non-cash investing activities:
Beneficial interests obtained in exchange for securitized trade receivables	0	0	1,222
Additions to properties included in accounts payable	$ 128	$ 162	$ 151

Accounting Policies

Accounting Policies	12 Months Ended
	Dec. 28, 2019
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES Basis of presentation The consolidated financial statements include the accounts of the Kellogg Company, those of the subsidiaries that it controls due to ownership of a majority voting interest (Kellogg or the Company). The Company continually evaluates its involvement with variable interest entities (VIEs) to determine whether it has variable interests and is the primary beneficiary of the VIE. When these criteria are met, the Company is required to consolidate the VIE. The Company’s share of earnings or losses of nonconsolidated affiliates is included in its consolidated operating results using the equity method of accounting when it is able to exercise significant influence over the operating and financial decisions of the affiliate. The Company uses the cost method of accounting if it is not able to exercise significant influence over the operating and financial decisions of the affiliate. Intercompany balances and transactions are eliminated. The Company’s fiscal year normally ends on the Saturday closest to December 31 and as a result, a 53rd week is added approximately every sixth year. The Company’s 2019, 2018 and 2017 fiscal years each contained 52 weeks and ended on December 28, 2019 , December 29, 2018 , and December 30, 2017, respectively. Use of estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods reported. Actual results could differ from those estimates. Cash and cash equivalents Highly liquid investments with remaining stated maturities of three months or less when purchased are considered cash equivalents and recorded at cost. Accounts receivable Accounts receivable consists principally of trade receivables, which are recorded at the invoiced amount, net of allowances for doubtful accounts and prompt payment discounts. Trade receivables do not bear interest. The allowance for doubtful accounts represents management’s estimate of the amount of probable credit losses in existing accounts receivable, as determined from a review of past due balances and other specific account data. Account balances are written off against the allowance when management determines the receivable is uncollectible. For the years ended 2019 and 2018 the Company did not have off-balance sheet credit exposure related to its customers. Please refer to Note 2 for information on sales of accounts receivable. Inventories Inventories are valued at the lower of cost or net realizable value. Cost is determined on an average cost basis. Property The Company’s property consists mainly of plants and equipment used for manufacturing activities. These assets are recorded at cost and depreciated over estimated useful lives using straight-line methods for financial reporting and accelerated methods, where permitted, for tax reporting. Major property categories are depreciated over various periods as follows (in years): manufacturing machinery and equipment 15 - 30 ; office equipment 5 ; computer equipment and capitalized software 3 - 7 ; building components 20 ; building structures 10 - 50 . Cost includes interest associated with significant capital projects. Plant and equipment are reviewed for impairment when conditions indicate that the carrying value may not be recoverable. Such conditions include an extended period of idleness or a plan of disposal. Assets to be disposed of at a future date are depreciated over the remaining period of use. Assets to be sold are written down to realizable value at the time the assets are being actively marketed for sale and a sale is expected to occur within one year. There were no assets held for sale at the year-end 2019 or 2018. Goodwill and other intangible assets Goodwill and indefinite-lived intangibles are not amortized, but are tested at least annually for impairment of value and whenever events or changes in circumstances indicate the carrying amount of the asset may be impaired. An intangible asset with a finite life is amortized on a straight-line basis over the estimated useful life, which materially approximates the pattern of economic benefit. For the goodwill impairment test, the fair value of the reporting units are estimated based on market multiples. This approach employs market multiples based on either sales or earnings before interest, taxes, depreciation and amortization for companies that are comparable to the Company’s reporting units. In the event the fair value determined using the market multiple approach is close to carrying value, the Company may supplement the fair value determination using discounted cash flows. The assumptions used for the impairment test are consistent with those utilized by a market participant performing similar valuations for the Company’s reporting units. Similarly, impairment testing of other intangible assets requires a comparison of carrying value to fair value of that particular asset. Fair values of non-goodwill intangible assets are based primarily on projections of future cash flows to be generated from that asset. For instance, cash flows related to a particular trademark would be based on a projected royalty stream attributable to branded product sales, discounted at rates consistent with rates used by market participants. These estimates are made using various inputs including historical data, current and anticipated market conditions, management plans, and market comparables. Accounts payable The Company has agreements with third parties to provide accounts payable tracking systems which facilitate participating suppliers’ ability to monitor and, if elected, sell payment obligations from the Company to designated third-party financial institutions. Participating suppliers may, at their sole discretion, make offers to sell one or more payment obligations of the Company prior to their scheduled due dates at a discounted price to participating financial institutions. The Company’s goal is to capture overall supplier savings, in the form of payment terms or vendor funding, and the agreements facilitate the suppliers’ ability to sell payment obligations, while providing them with greater working capital flexibility. The Company has no economic interest in the sale of these suppliers’ receivables and no direct financial relationship with the financial institutions concerning these services. The Company’s obligations to its suppliers, including amounts due and scheduled payment dates, are not impacted by suppliers’ decisions to sell amounts under the arrangements. However, the Company’s right to offset balances due from suppliers against payment obligations is restricted by the agreements for those payment obligations that have been sold by suppliers. The payment of these obligations by the Company is included in cash used in operating activities in the Consolidated Statement of Cash Flows. As of December 28, 2019 , $812 million of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system, and participating suppliers had sold $605 million of those payment obligations to participating financial institutions. As of December 29, 2018 , $893 million of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system, and participating suppliers had sold $701 million of those payment obligations to participating financial institutions. Revenue recognition The Company recognizes sales upon delivery of its products to customers. Revenue, which includes shipping and handling charges billed to the customer, is reported net of applicable discounts, returns, allowances, and various government withholding taxes. Methodologies for determining these provisions are dependent on local customer pricing and promotional practices, which range from contractually fixed percentage price reductions to reimbursement based on actual occurrence or performance. Where applicable, future reimbursements are estimated based on a combination of historical patterns and future expectations regarding specific in-market product performance. The Company recognizes revenue from the sale of food products which are sold to retailers through direct sales forces, broker and distributor arrangements. The Company also recognizes revenue from the license of our trademarks granted to third parties who uses these trademarks on their merchandise and revenue from hauling services provided to third parties within certain markets. Revenue from these licenses and hauling services is not material to the Company. Contract balances recognized in the current period that are not the result of current period performance are not material to the Company. The Company also does not incur costs to obtain or fulfill contracts. The Company does not adjust the promised amount of consideration for the effects of significant financing components as the Company expects, at contract inception, that the period between the transfer of a promised good or service to a customer and when the customer pays for that good or service will be one year or less. The Company accounts for shipping and handling activities that occur before the customer has obtained control of a good as fulfillment activities (i.e., an expense) rather than as a promised service. The Company excludes from the measurement of transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the Company from a customer for sales taxes. Performance obligations The Company recognizes revenue when (or as) performance obligations are satisfied by transferring control of the goods to customers. Control is transferred upon delivery of the goods to the customer. The customer is invoiced with payment terms which are commensurate with the customer’s credit profile. Shipping and/or handling costs that occur before the customer obtains control of the goods are deemed to be fulfillment activities and are accounted for as fulfillment costs. The Company assesses the goods and services promised in its customers’ purchase orders and identifies a performance obligation for each promise to transfer a good or service (or bundle of goods or services) that is distinct. To identify the performance obligations, the Company considers all the goods or services promised, whether explicitly stated or implied based on customary business practices. For a purchase order that has more than one performance obligation, the Company allocates the total consideration to each distinct performance obligation on a relative standalone selling price basis. Significant Judgments The Company offers various forms of trade promotions and the methodologies for determining these provisions are dependent on local customer pricing and promotional practices, which range from contractually fixed percentage price reductions to provisions based on actual occurrence or performance. Where applicable, future provisions are estimated based on a combination of historical patterns and future expectations regarding specific in-market product performance. The Company's promotional activities are conducted either through the retail trade or directly with consumers and include activities such as in-store displays and events, feature price discounts, consumer coupons, contests and loyalty programs. The costs of these activities are generally recognized at the time the related revenue is recorded, which normally precedes the actual cash expenditure. The recognition of these costs therefore requires management judgment regarding the volume of promotional offers that will be redeemed by either the retail trade or consumer. These estimates are made using various techniques including historical data on performance of similar promotional programs. Differences between estimated expense and actual redemptions are normally immaterial and recognized as a change in management estimate in a subsequent period. Advertising and promotion The Company expenses production costs of advertising the first time the advertising takes place. Advertising expense is classified in selling, general and administrative (SGA) expense. The Company classifies promotional payments to its customers, the cost of consumer coupons, and other cash redemption offers in net sales. Promotional allowances are estimated using various techniques including historical cash expenditure and redemption experience and patterns. Differences between estimated expense and actual redemptions are normally immaterial and recognized as a change in management estimate in a subsequent period. The liability associated with these promotions are recorded in other current liabilities. The cost of promotional package inserts is recorded in cost of goods sold (COGS). Other types of consumer promotional expenditures are recorded in SGA expense. Research and development The costs of research and development (R&D) are expensed as incurred and are classified in SGA expense. R&D includes expenditures for new product and process innovation, as well as significant technological improvements to existing products and processes. The Company’s R&D expenditures primarily consist of internal salaries, wages, consulting, and supplies attributable to time spent on R&D activities. Other costs include depreciation and maintenance of research facilities and equipment, including assets at manufacturing locations that are temporarily engaged in pilot plant activities. Stock-based compensation The Company uses stock-based compensation, including stock options, restricted stock, restricted stock units, and executive performance shares, to provide long-term performance incentives for its global workforce. The Company classifies pre-tax stock compensation expense in SGA and COGS within its corporate operations. Expense attributable to awards of equity instruments is recorded in capital in excess of par value in the Consolidated Balance Sheet. Certain of the Company’s stock-based compensation plans contain provisions that prorate vesting of awards upon retirement, disability, or death of eligible employees and directors. A stock-based award is considered vested for expense attribution purposes when the employee’s retention of the award is no longer contingent on providing subsequent service. Accordingly, the Company recognizes compensation cost immediately for awards granted to retirement-eligible individuals or over the period from the grant date to the date retirement eligibility is achieved, if less than the stated vesting period. The Company recognizes compensation cost for stock option awards that have a graded vesting schedule on a straight-line basis over the requisite service period for the entire award. Income taxes The Company recognizes uncertain tax positions based on a benefit recognition model. Provided that the tax position is deemed more likely than not of being sustained, the Company recognizes the largest amount of tax benefit that is greater than 50 percent likely of being ultimately realized upon settlement. The tax position is derecognized when it is no longer more likely than not of being sustained. The Company classifies income tax-related interest and penalties as interest expense and SGA expense, respectively, on the Consolidated Statement of Income. The current portion of the Company’s unrecognized tax benefits is presented in the Consolidated Balance Sheet in other current assets and other current liabilities, and the amounts expected to be settled after one year are recorded in other assets and other liabilities. Management monitors the Company’s ability to utilize certain future tax deductions, operating losses and tax credit carryforwards, prior to expiration as well as the reinvestment assertion regarding our undistributed foreign earnings. Changes resulting from management’s assessment will result in impacts to deferred tax assets and the corresponding impacts on the effective income tax rate. Valuation allowances were recorded to reduce deferred tax assets to an amount that will, more likely than not, be realized in the future. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act includes a provision designed to tax currently global intangible low taxed income (GILTI) starting in 2018. Under the provision, a U.S. shareholder is required to include in gross income the amount of its GILTI, which is 50% of the excess of the shareholder’s net tested income of its controlled foreign corporation over the deemed tangible income return. The amount of GILTI included by a U.S. shareholder is computed by aggregating all controlled foreign corporations (CFC). Shareholders are allowed to claim a foreign tax credit for 80 percent of the taxes paid or accrued with respect to the tested income of each CFC, subject to some limitations. The Company elected to account for the GILTI as a period cost and has included an estimate for GILTI in its effective tax rate. Derivative Instruments The fair value of derivative instruments is recorded in other current assets, other assets, other current liabilities or other liabilities. Gains and losses representing either hedge ineffectiveness, hedge components excluded from the assessment of effectiveness, or hedges of translational exposure are recorded in the Consolidated Statement of Income in other income (expense), net (OIE) or interest expense. In the Consolidated Statement of Cash Flows, settlements of cash flow and fair value hedges are classified as an operating activity; settlements of all other derivative instruments, including instruments for which hedge accounting has been discontinued, are classified consistent with the nature of the instrument. Cash flow hedges. Qualifying derivatives are accounted for as cash flow hedges when the hedged item is a forecasted transaction. Gains and losses on these instruments are recorded in other comprehensive income until the underlying transaction is recorded in earnings. When the hedged item is realized, gains or losses are reclassified from accumulated other comprehensive income (loss) (AOCI) to the Consolidated Statement of Income on the same line item as the underlying transaction. Fair value hedges. Qualifying derivatives are accounted for as fair value hedges when the hedged item is a recognized asset, liability, or firm commitment. Gains and losses on these instruments are recorded in earnings, offsetting gains and losses on the hedged item. Net investment hedges. Qualifying derivative and nonderivative financial instruments are accounted for as net investment hedges when the hedged item is a nonfunctional currency investment in a subsidiary. Gains and losses on these instruments are included in foreign currency translation adjustments in AOCI. Derivatives not designated for hedge accounting. Gains and losses on these instruments are recorded in the Consolidated Statement of Income, on the same line item as the underlying hedged item. Foreign currency exchange risk. The Company is exposed to fluctuations in foreign currency cash flows related primarily to third-party purchases, intercompany transactions and when applicable, nonfunctional currency denominated third-party debt. The Company is also exposed to fluctuations in the value of foreign currency investments in subsidiaries and cash flows related to repatriation of these investments. Additionally, the Company is exposed to volatility in the translation of foreign currency denominated earnings to U.S. dollars. Management assesses foreign currency risk based on transactional cash flows and translational volatility and may enter into forward contracts, options, and currency swaps to reduce fluctuations in long or short currency positions. Forward contracts and options are generally less than 18 months duration. Currency swap agreements are established in conjunction with the term of underlying debt issues. For foreign currency cash flow and fair value hedges, the assessment of effectiveness is generally based on changes in spot rates. Changes in time value are reported in OIE. Interest rate risk. The Company is exposed to interest rate volatility with regard to future issuances of fixed rate debt and existing and future issuances of variable rate debt. The Company periodically uses interest rate swaps, including forward-starting swaps, to reduce interest rate volatility and funding costs associated with certain debt issues, and to achieve a desired proportion of variable versus fixed rate debt, based on current and projected market conditions. Fixed-to-variable interest rate swaps are accounted for as fair value hedges and the assessment of effectiveness is based on changes in the fair value of the underlying debt, using incremental borrowing rates currently available on loans with similar terms and maturities. Price risk. The Company is exposed to price fluctuations primarily as a result of anticipated purchases of raw and packaging materials, fuel, and energy. The Company has historically used the combination of long-term contracts with suppliers, and exchange-traded futures and option contracts to reduce price fluctuations in a desired percentage of forecasted raw material purchases over a duration of generally less than 18 months. Pension benefits, nonpension postretirement and postemployment benefits The Company sponsors a number of U.S. and foreign plans to provide pension, health care, and other welfare benefits to retired employees, as well as salary continuance, severance, and long-term disability to former or inactive employees. The recognition of benefit expense is based on actuarial assumptions, such as discount rate, long-term rate of compensation increase, and long-term rate of return on plan assets and health care cost trend rate. Service cost is reported in COGS and SGA expense on the Consolidated Statement of Income. All other components of net periodic pension cost are included in OIE. Postemployment benefits. The Company recognizes an obligation for postemployment benefit plans that vest or accumulate with service. Obligations associated with the Company’s postemployment benefit plans, which are unfunded, are included in other current liabilities and other liabilities on the Consolidated Balance Sheet. All gains and losses are recognized over the average remaining service period of active plan participants. Postemployment benefits that do not vest or accumulate with service or benefits to employees in excess of those specified in the respective plans are expensed as incurred. Pension and nonpension postretirement benefits. The Company recognizes actuarial gains and losses in operating results in the year in which they occur. Experience gains and losses are recognized annually as of the measurement date, which is the Company’s fiscal year-end, or when remeasurement is otherwise required under generally accepted accounting principles. The Company uses the fair value of plan assets to calculate the expected return on plan assets. Reportable segments are allocated service cost. All other components of pension and postretirement benefit expense, including interest cost, expected return on assets, prior service cost, and experience gains and losses are considered unallocated corporate costs and are not included in the measure of reportable segment operating results. See Note 17 for more information on reportable segments. Management reviews the Company’s expected long-term rates of return annually; however, the benefit trust investment performance for one particular year does not, by itself, significantly influence this evaluation. The expected rates of return are generally not revised provided these rates fall between the 25th and 75th percentile of expected long-term returns, as determined by the Company’s modeling process. For defined benefit pension and postretirement plans, the Company records the net overfunded or underfunded position as a pension asset or pension liability on the Consolidated Balance Sheet. New accounting standards Income Taxes. In October 2016, the Financial Accounting Standards Board (FASB), as part of their simplification initiative, issued an Accounting Standards Update (ASU) to improve the accounting for income tax consequences of intra-entity transfers of assets other than inventory. The amendments in the ASU eliminate the exception, such that entities should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the period of adoption. The Company early adopted the ASU in the first quarter of 2017. As a result of intercompany transfers of intellectual property, the Company recorded a $39 million reduction in income tax expense during the year ended December 30, 2017. Upon adoption, there was no cumulative effect adjustment to retained earnings. Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities. In August 2017, the FASB issued an ASU intended to simplify hedge accounting by better aligning an entity’s financial reporting for hedging relationships with its risk management activities. The ASU also simplifies the application of the hedge accounting guidance. The new guidance is effective fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. For cash flow hedges existing at the adoption date, the standard requires adoption on a modified retrospective basis with a cumulative-effect adjustment to the Consolidated Balance Sheet as of the beginning of the year of adoption. The amendments to presentation guidance and disclosure requirements are required to be adopted prospectively. The Company adopted the ASU in the first quarter of 2018. The impact of adoption was immaterial to the financial statements. Simplifying the test for goodwill impairment. In January 2017, the FASB issued an ASU to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The ASU is effective for an entity's annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The amendments in this ASU should be applied on a prospective basis. The Company adopted the ASU in the first quarter of 2018 with no impact. Recognition and measurement of financial assets and liabilities. In January 2016, the FASB issued an ASU which requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income and which updates certain presentation and disclosure requirements. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. Early adoption can be elected for all financial statements of fiscal years and interim periods that have not yet been issued or that have not yet been made available for issuance. Entities should apply the update by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The Company adopted the updated standard in the first quarter of 2018. The impact of adoption was immaterial to the financial statements. Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. In February 2018, the Financial Accounting Standards Board (FASB) issued an Accounting Standard Update (ASU) permitting a company to reclassify the disproportionate income tax effects of the Tax Cuts and Jobs Act of 2017 on items within accumulated other comprehensive income (AOCI) to retained earnings. We elected to adopt the ASU effective in the first quarter of 2019 and reclassified the disproportionate income tax effect recorded within AOCI to retained earnings. This resulted in a decrease to AOCI and an increase to retained earnings of $22 million . The adjustment primarily related to deferred taxes previously recorded for pension and other postretirement benefits, as well as hedging positions for debt and net investment hedges. Leases. In February 2016, the FASB issued an ASU which requires the recognition of lease assets and lease liabilities by lessees for all leases with terms greater than 12 months. The distinction between finance leases and operating leases remains, with similar classification criteria as current GAAP to distinguish between capital and operating leases. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases are recognized on the Consolidated Balance Sheet. Lessor accounting remains substantially similar to previous GAAP. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company adopted the ASU in the first quarter of 2019, using the optional transition method that allows for a cumulative-effect adjustment in the period of adoption with no restatement of prior periods. The Company elected the package of practical expedients permitted under the transition guidance that allows for the carry forward of historical lease classifications and consistent treatment of initial direct costs for existing leases. The Company also elected to apply the practical expedient that allows the continued historical treatment of land easements. The Company did not elect the practical expedient for the use of hindsight in evaluating the expected lease term of existing leases. The adoption of the ASU resulted in the recording of operating lease assets and operating lease liabilities of approximately $453 million to $461 million respectively, as of December 30, 2018. The difference between the additional lease assets and lease liabilities, represents existing deferred rent and prepaid lease balances that were reclassified on the balance sheet. The adoption of the ASU did not have a material impact to the Company’s Consolidated Statements of Income or Cash Flows. Accounting standards to be adopted in future periods Cloud Computing Arrangements. In August 2018, the FASB issued ASU 2018-15: Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The ASU allows companies to capitalize implementation costs incurred in a hosting arrangement that is a service contract over the term of the hosting arrangement, including periods covered by renewal options that are reasonably certain to be exercised. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019 and can be applied retrospectively or prospectively. Early adoption is permitted. The Company plans to adopt the ASU in the first quarter of 2020 and apply it prospectively. The adoption is not expected to have a material impact to the Company's Consolidated Financial Statements. Compensation Retirement Benefits. In August 2018, the FASB issued ASU 2018-14: Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. The ASU removed disclosures that no longer are considered cost beneficial, clarified the specific requirements of disclosures, and added disclosure requirements identified as relevant. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2020 and can be applied retrospectively or prospectively. Early adoption is permitted. The Company is currently assessing when to adopt the ASU and the impact of adoption.

Sale of Accounts Receivable

Sale of Accounts Receivable	12 Months Ended
	Dec. 28, 2019
Transfers and Servicing of Financial Assets [Abstract]
Transfers and Servicing of Financial Assets [Text Block]	SALE OF ACCOUNTS RECEIVABLE The Company has a program in which a discrete group of customers are allowed to extend their payment terms in exchange for the elimination of early payment discounts (Extended Terms Program). The Company has two Receivable Sales Agreements (Monetization Programs) described below, which are intended to directly offset the impact the Extended Terms Program would have on the days-sales-outstanding (DSO) metric that is critical to the effective management of the Company's accounts receivable balance and overall working capital. The Monetization Programs are designed to effectively offset the impact on working capital of the Extended Terms Program. The Monetization Programs sell, on a revolving basis, certain trade accounts receivable invoices to third party financial institutions. Transfers under these agreements are accounted for as sales of receivables resulting in the receivables being de-recognized from the Consolidated Balance Sheet. The Monetization Programs provide for the continuing sale of certain receivables on a revolving basis until terminated by either party; however the maximum receivables that may be sold at any time is $1,033 million . The Company has no retained interest in the receivables sold, however the Company does have collection and administrative responsibilities for the sold receivables. The Company has not recorded any servicing assets or liabilities as of December 28, 2019 and December 29, 2018 for these agreements as the fair value of these servicing arrangements as well as the fees earned were not material to the financial statements. Accounts receivable sold of $774 million and $900 million remained outstanding under these arrangements as of December 28, 2019 and December 29, 2018, respectively. The proceeds from these sales of receivables are included in cash from operating activities in the Consolidated Statement of Cash Flows. The recorded net loss on sale of receivables was $25 million , $26 million and $11 million for the years ended December 28, 2019, December 29, 2018 and December 30, 2017, respectively. The recorded loss is included in Other income and expense. Other programs Additionally, from time to time certain of the Company's foreign subsidiaries will transfer, without recourse, accounts receivable balances of certain customers to financial institutions. These transactions are accounted for as sales of the receivables resulting in the receivables being de-recognized from the Consolidated Balance Sheet. Accounts receivable sold of $89 million and $93 million remained outstanding under these programs as of December 28, 2019 and December 29, 2018, respectively. The proceeds from these sales of receivables are included in cash from operating activities in the Consolidated Statement of Cash Flows. The recorded net loss on the sale of these receivables is included in Other income and expense and is not material.

Divestiures, West Africa Invest

Divestiures, West Africa Investments and Acquisitions	12 Months Ended
	Dec. 28, 2019
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	DIVESTITURES, WEST AFRICA INVESTMENTS AND ACQUISITIONS Divestiture On July 28, 2019, the Company completed its sale of selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cones businesses to Ferrero International S.A. (“Ferrero”) for approximately $1.3 billion in cash, subject to a working capital adjustment mechanism. Both the total assets and net assets of the businesses were approximately $1.3 billion , resulting in a net pre-tax gain of $38 million during the year ended December 28, 2019, recorded in Other income and (expense), after including related costs to sell of $14 million . Additionally, the Company recognized curtailment gains related to the divestiture totaling $17 million in our U.S. pension and nonpension postretirement plans. The operating results for these businesses were primarily included in the North America reporting segment prior to the sale. Proceeds from the divestiture were used primarily to redeem $1.0 billion of debt during the third quarter. Additionally, the Company paid approximately $255 million of cash taxes on the divestiture in the fourth quarter of 2019. In connection with the sale, the Company entered into a transition services agreement (TSA) with Ferrero, under which the Company will provide certain services to Ferrero to help facilitate an orderly transition of the businesses following the sale. In return for these services, Ferrero is required to pay certain agreed upon fees that are designed to reimburse the Company for certain costs incurred by the Company in providing such services, plus specified immaterial margins. The TSA provides for a term of services starting at the sale completion date and continuing for a period of up to 18 months. Multipro acquisition On May 2, 2018, the Company (i) acquired an incremental 1% ownership interest in Multipro, a leading distributor of a variety of food products in Nigeria and Ghana, and (ii) exercised its call option (Purchase Option) to acquire a 50% interest in Tolaram Africa Foods, PTE LTD (TAF), a holding company with a 49% equity interest in an affiliated food manufacturer, resulting in the Company having a 24.5% interest in the affiliated food manufacturer. The aggregate cash consideration paid was approximately $419 million and was funded through cash on hand and short-term borrowings, which was refinanced with long-term borrowings in May 2018. As part of the consideration for the acquisition, an escrow established in connection with the original Multipro investment in 2015, which represented a significant portion of the amount paid for the Company’s initial investment, was released by the Company. The amount paid to exercise the Purchase Option was subject to certain working capital and net debt adjustments based on the actual working capital and net debt existing on the exercise date compared to targeted amounts. These adjustments were finalized during 2018 and resulted in an increase in the purchase price of $1 million . As a result of the Company’s incremental ownership interest in Multipro and concurrent changes to the shareholders' agreement, the Company now has a 51% controlling interest in and began consolidating Multipro. Accordingly, the acquisition was accounted for as a business combination and the assets and liabilities of Multipro were included in the December 29, 2018 Consolidated Balance Sheet and the results of its operations have been included in the Consolidated Statement of Income subsequent to the acquisition date. The aggregate of the consideration paid and the fair value of previously held equity interest totaled $626 million , or $617 million net of cash acquired. The Multipro investment was previously accounted for under the equity method of accounting and the Company recorded our share of equity income or loss from Multipro within Earnings (loss) from unconsolidated entities. In connection with the business combination, the Company recognized a one-time, non-cash gain on the disposition of our previously held equity interest in Multipro of $245 million , which is included within Earnings (loss) from unconsolidated entities. We utilized estimated fair values at the acquisition date to allocate the total consideration exchanged to the net tangible and intangible assets acquired and liabilities assumed. The acquisition resulted in $616 million of non-tax deductible goodwill relating principally to planned growth in new markets, deferred taxes associated with intangible assets, and any intangible assets that did not qualify for separate recognition. We used the excess earnings method, a variation of the income approach, to value a perpetual distribution agreement indefinite lived intangible asset. We also valued customer relationships, using either the excess earnings method or with-and-without method, which is also a variation of the income approach. Some of the more significant assumptions inherent in developing the valuations included the estimated annual net cash flows for each indefinite-lived or definite-lived intangible asset (including net sales, cost of products sold, selling and marketing costs, and working capital/contributory asset charges), the discount rate that appropriately reflects the risk inherent in each future cash flow stream, the assessment of each asset’s life cycle, and competitive trends, as well as other factors. We determined the assumptions used in the financial forecasts using historical data, supplemented by current and anticipated market conditions, estimated product category growth rates, management plans, and market comparables. We used carrying values as of the acquisition date to value certain current and non-current assets and liabilities, as we determined that they represented the fair value of those items at the acquisition date. Deferred income tax assets and liabilities as of the acquisition date represented the expected future tax consequences of temporary differences between the fair values of the assets acquired and liabilities assumed and their tax bases. We estimated the fair value of non-controlling interests assumed consistent with the manner in which we valued all of the underlying assets and liabilities. The assets and liabilities are included in the Consolidated Balance Sheet as of December 29, 2018 within the Kellogg AMEA reporting segment. The fair value of the acquired assets, assumed liabilities, and noncontrolling interest include the following: (millions) May 2, 2018 Current assets $ 118 Property 41 Goodwill 616 Intangible assets subject to amortization, primarily customer relationships 425 Intangible assets not subject to amortization, primarily distribution rights 373 Deferred tax liability (254 ) Other liabilities (150 ) Noncontrolling interest (552 ) $ 617 The amounts in the above table represent the final allocation of purchase price as of December 29, 2018. During 2018, deferred tax liabilities were decreased by $2 million and other liabilities were increased by $2 million in conjunction with an updated allocation of the purchase price. For the post-acquisition period ended December 29, 2018, the acquisition added net sales of $536 million and net earnings of $8 million , including transaction fees and integration costs. The Company's consolidated unaudited pro forma historical net sales and net income, as if Multipro had been acquired at the beginning of 2017, exclusive of the non-cash $245 million gain on the disposition of the equity interest recognized in the second quarter of 2018, are estimated as follows: Year ended (millions) December 29, 2018 December 30, 2017 Net sales $ 13,829 $ 13,511 Net Income attributable to Kellogg Company $ 1,336 $ 1,255 Investment in TAF The investment in TAF, our interest in an affiliated food manufacturer, is accounted for under the equity method of accounting with the Company’s share of equity income or loss being recognized within Earnings (loss) from unconsolidated entities. During 2018, when the call option was exercised for TAF, the $458 million aggregate of the consideration paid upon exercise and the historical cost value of the Purchase Option was compared to the estimated fair value of the Company’s ownership percentage of TAF and the Company recognized a one-time, non-cash loss of $45 million within Earnings (loss) from unconsolidated entities, which represents an other than temporary excess of cost over fair value of the investment. The difference between the carrying amount of TAF and the underlying equity in net assets is primarily attributable to brand and customer list intangible assets, a portion of which is being amortized over future periods, and goodwill. TAF and certain other unconsolidated entities of the Company are suppliers of Multipro. The related trade payables are generally settled on a monthly basis. TAF’s net sales, totaling $581 million for the year ended December 28, 2019 and $350 million for the seven months ended December 29, 2018, consist primarily of inventory purchases by Multipro. RX acquisition In October 2017, the Company completed its acquisition of Chicago Bar Co., LLC, the manufacturer of RXBAR, for $600 million , or $596 million net of cash and cash equivalents. The purchase price was subject to certain working capital and net debt adjustments based on the actual working capital and net debt existing on the acquisition date compared to targeted amounts. These adjustments were finalized during 2018 and resulted in a purchase price reduction of $1 million . The acquisition was accounted for under the purchase price method and was financed with short-term borrowings. For the post-acquisition period ended December 30, 2017, the acquisition added $27 million in net sales and less than $1 million of operating profit in the Company's North America reporting segment. The pro forma effects of this acquisition were not material. The assets and liabilities are included in the Consolidated Balance Sheet as of December 28, 2019 within the North America reporting segment. The acquired assets and assumed liabilities include the following: (millions) October 27, 2017 Current assets $ 42 Goodwill 373 Intangible assets, primarily indefinite-lived brands 203 Current liabilities (23 ) $ 595 The amounts in the above table represent the final allocation of purchase price as of December 29, 2018, which resulted in a $2 million increase in amortizable intangible assets with a corresponding reduction of goodwill during 2018.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets [Text Block]	GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Changes in the carrying amount of goodwill, intangible assets subject to amortization, consisting primarily of customer relationships, and indefinite-lived intangible assets, consisting of brands and distribution agreements, are presented in the following tables: Carrying amount of goodwill (millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 4,617 $ 368 $ 244 $ 275 $ 5,504 Additions — — — 616 616 Purchase price allocation adjustment (2 ) — — — (2 ) Purchase price adjustment — — — — — Currency translation adjustment (4 ) (22 ) (26 ) (16 ) (68 ) December 29, 2018 $ 4,611 $ 346 $ 218 $ 875 $ 6,050 Divestiture (191 ) — — — (191 ) Currency translation adjustment 2 1 (5 ) 4 2 December 28, 2019 $ 4,422 $ 347 $ 213 $ 879 $ 5,861 Intangible assets subject to amortization Gross carrying amount (millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 72 $ 45 $ 74 $ 10 $ 201 Additions — — — 425 425 Purchase price allocation adjustment 2 — — — 2 Currency translation adjustment — (2 ) (11 ) (7 ) (20 ) December 29, 2018 $ 74 $ 43 $ 63 $ 428 $ 608 Additions 2 — — — 2 Divestiture (12 ) — — — (12 ) Currency translation adjustment — (2 ) (3 ) 1 (4 ) December 28, 2019 $ 64 $ 41 $ 60 $ 429 $ 594 Accumulated Amortization December 30, 2017 $ 35 $ 18 $ 10 $ 4 $ 67 Amortization 4 3 4 12 23 Currency translation adjustment — (1 ) (2 ) — (3 ) December 29, 2018 $ 39 $ 20 $ 12 $ 16 $ 87 Amortization (a) 4 2 3 18 27 Divestiture (12 ) — — — (12 ) Currency translation adjustment — (1 ) — — (1 ) December 28, 2019 $ 31 $ 21 $ 15 $ 34 $ 101 Intangible assets subject to amortization, net December 30, 2017 $ 37 $ 27 $ 64 $ 6 $ 134 Additions — — — 425 425 Amortization (4 ) (3 ) (4 ) (12 ) (23 ) Purchase price allocation adjustment 2 — — — 2 Currency translation adjustment — (1 ) (9 ) (7 ) (17 ) December 29, 2018 $ 35 $ 23 $ 51 $ 412 $ 521 Additions 2 — — — 2 Amortization (4 ) (2 ) (3 ) (18 ) (27 ) Divestiture — — — — — Currency translation adjustment — (1 ) (3 ) 1 (3 ) December 28, 2019 $ 33 $ 20 $ 45 $ 395 $ 493 (a) The currently estimated aggregate amortization expense for each of the next five succeeding fiscal periods is approximately $28 million per year through 2024. Intangible assets not subject to amortization (millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 1,985 $ 420 $ 86 $ 14 $ 2,505 Additions — — — 373 373 Purchase price allocation adjustment — — — — — Currency translation adjustment — (19 ) (13 ) (6 ) (38 ) December 29, 2018 $ 1,985 $ 401 $ 73 $ 381 $ 2,840 Additions 18 — — — 18 Divestiture (765 ) — — — (765 ) Currency translation adjustment — (9 ) (3 ) 2 (10 ) December 28, 2019 $ 1,238 $ 392 $ 70 $ 383 $ 2,083 Annual Impairment Testing On December 30, 2018 the Company reorganized our North American business. The reorganization eliminated the legacy business unit structure and internal reporting. In addition, the Company changed the internal reporting provided to the chief operating decision maker (CODM) and segment manager. As a result, the Company reevaluated its operating segments and reporting units. In addition, we transferred the management of our Middle East, North Africa, and Turkey businesses from Europe to AMEA, effective December 30, 2018. Refer to Note 17 Reportable Segments for further details on these changes. As a result of these changes in operating segments and related reporting units, the Company re-allocated goodwill between reporting units where necessary and compared the carrying value to the fair value of each impacted reporting unit on a before and after basis. This evaluation was only required to be performed on reporting units impacted by the changes noted above. Effective December 30, 2018 in North America, the previous U.S. Snacks, U.S. Morning Foods, U.S. Specialty Channels, U.S. Frozen Foods, Kashi, Canada and RX operating segments are now a single operating segment (Kellogg North America). At the beginning of 2019, the Company evaluated the related impacted reporting units for impairment on a before and after basis and concluded that the fair values of each reporting unit exceeded their carrying values. Approximately $46 million of goodwill was re-allocated between the impacted reporting units within Europe and AMEA related to the transfer of businesses between these operating segments. The Company performed a goodwill evaluation of the impacted reporting units on a before and after basis and concluded that the fair value of the impacted reporting units exceeded their carrying values. Additionally, during the first quarter of 2019, the Company determined that it was more likely than not that the Company would be selling selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cones businesses within the North America reporting unit. As a result, the Company performed a goodwill impairment evaluation on the North America reporting unit in the first quarter of 2019 and concluded that the fair value exceeded the carrying value of the reporting unit. During the second quarter of 2019, the Company entered into a definitive agreement to sell the businesses to Ferrero. The sale was completed during the third quarter of 2019 and resulted in the divestiture of the net assets and liabilities of these businesses, included in the North America reporting unit, including $191 million of Goodwill and $765 million of Net Intangibles. In addition to the cash consideration received, the Company entered into a perpetual royalty-free licensing agreement with Ferrero, allowing Kellogg the use of certain brand names for cracker products. The license agreement was fair valued at $18 million and recorded as an indefinite-lived intangible asset. At December 28, 2019 , goodwill and other intangible assets amounted to $8.4 billion , consisting primarily of goodwill and brands originally associated with the 2001 acquisition of Keebler Foods Company and the 2012 acquisition of Pringles. Within this total, approximately $2.1 billion of non-goodwill intangible assets were classified as indefinite-lived, including $1.7 billion related to trademarks, comprised principally of Pringles and cracker-related trademarks. The majority of these intangible assets are recorded in our North America reporting unit. The Company currently believes the fair value of goodwill and other intangible assets exceeds their carrying value and that those intangibles so classified will contribute indefinitely to cash flows. Through impairment testing performed during the fourth quarter of 2019, no heightened risk of impairment of individual intangible assets or reporting units was identified. Additionally, the Company has goodwill of $606 million and $373 million

Restructuring and Cost Reductio

Restructuring and Cost Reduction Activities	12 Months Ended
	Dec. 28, 2019
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities	RESTRUCTURING PROGRAMS The Company views its restructuring and cost reduction activities as part of its operating principles to provide greater visibility in achieving its long-term profit growth targets. Initiatives undertaken are currently expected to recover cash implementation costs within a 3 to 5 -year period of completion. Upon completion (or as each major stage is completed in the case of multi-year programs), the project begins to deliver cash savings and/or reduced depreciation. Project K As of the end of 2019, the Company has completed implementation of all Project K initiatives. Total project charges, after-tax cash costs and annual savings delivered by Project K were in line with expectations. Since inception, Project K has reduced the Company’s cost structure, and provided enduring benefits, including an optimized supply chain infrastructure, an efficient global business services model, a global focus on categories, increased agility from a more efficient organization design, and improved effectiveness in go-to-market models. These benefits have strengthen existing businesses in core markets, increased growth in developing and emerging markets, and driven an increased level of value-added innovation. The total program resulted in pre-tax charges, of approximately $1.6 billion , with after-tax cash costs, including incremental capital expenditures, of approximately $1.2 billion . Total project charges consist of asset-related costs of approximately $500 million which consists primarily of asset impairments, accelerated depreciation and other exit-related costs; employee-related costs of approximately $400 million which includes severance, pension and other termination benefits; and other costs of approximately $700 million which consists primarily of charges related to the design and implementation of global business capabilities and a more efficient go-to-market model. Total pre-tax charges related to Project K impacted reportable segments as follows: North America (approximately 65% ), Europe (approximately 21% ), Latin America (approximately 4% ), AMEA (approximately 6% ), and Corporate (approximately 4% ). Since the inception of Project K, the Company recognized charges of $1,574 million that have been attributed to the program. The charges were comprised of $6 million being recorded as a reduction of revenue, $928 million being recorded in COGS, $807 million recorded in SGA and $(167) million recorded in OIE. Other programs During 2019, the Company announced a reorganization plan for the European reportable segment designed to simplify the organization, increase organizational efficiency, and enhance key processes. The overall project is expected to be substantially completed by the end of fiscal year 2020. The project is expected to result in cumulative pretax net charges of approximately $40 million , including certain non-cash credits. Cash costs are expected to be approximately $50 million . The total expected charges will include severance and other termination benefits and charges related to relocation, third party legal and consulting fees, and contract termination costs. The Company recorded total net charges of $38 million related to this initiative during 2019, with $43 million recorded in SG&A expense and $(5) million recorded in OIE. Also during 2019, the Company announced a reorganization plan which primarily impacts the North America reportable segment. The reorganization plan is designed to simplify the organization that supports the remaining North America reportable segment after the divestiture and related transition. The overall project is expected to be substantially completed by the end of fiscal year 2020. The overall project is expected to result in cumulative pretax charges of approximately $30 million . Cash costs are expected to approximate the pretax charges. Total expected charges will include severance and other termination benefits and charges related to third party consulting fees. The Company recorded total charges of $21 million related to this initiative during 2019. These charges were recorded in SG&A expense. Total programs During 2019, the Company recorded $113 million of charges associated with all restructuring programs. The charges were comprised of $35 million expense being recorded in Cost of Goods Sold (COGS), a $83 million expense recorded in Selling, General, Administrative (SG&A), and $(5) million recorded in Other (Income) Expense, net (OIE). The Company recorded $143 million of costs in 2018 associated with all restructuring programs. The charges were comprised of $99 million being recorded in COGS, $74 million recorded SG&A and $(30) million recorded in OIE. The Company recorded $263 million of costs in 2017 associated with all restructuring programs. The charges were comprised of $115 million expense being recorded in COGS, a $296 million expense recorded in SGA expense, and a $(148) million gain recorded in OIE. The tables below provide the details for the charges incurred during 2019, 2018 and 2017 and program costs to date for all programs currently active as of December 28, 2019. Program costs to date (millions) 2019 2018 2017 December 28, 2019 Employee related costs $ 49 $ 63 $ 177 $ 646 Pension curtailment (gain) loss, net (5 ) (30 ) (148 ) (172 ) Asset related costs 21 16 77 306 Asset impairment — 14 — 169 Other costs 48 80 157 684 Total $ 113 $ 143 $ 263 $ 1,633 Program costs to date (millions) 2019 2018 2017 December 28, 2019 North America $ 50 $ 107 $ 345 $ 1,072 Europe 47 3 40 380 Latin America 15 15 9 57 AMEA 3 11 11 101 Corporate (2 ) 7 (142 ) 23 Total $ 113 $ 143 $ 263 $ 1,633 Employee related costs consisted of severance and pension charges. Pension curtailment (gain) loss consists of curtailment gains or losses that resulted from project initiatives. Asset impairments were recorded for fixed assets that were determined to be impaired and were written down to their estimated fair value. See Note 14 for more information. Asset related costs consist primarily of accelerated depreciation. Other costs incurred consist primarily of lease termination costs as well as third-party incremental costs related to the development and implementation of global business capabilities and a more efficient go-to-market model. At December 28, 2019 total project reserves were $62 million , related to severance payments and other costs of which a substantial portion will be paid in 2020. The following table provides details for exit cost reserves. (millions) Employee Related Costs Curtailment Gain Loss, net Asset Impairment Asset Related Costs Other Costs Total Liability as of December 30, 2017 $ 97 $ — $ — $ — $ 63 $ 160 2018 restructuring charges 63 (30 ) 14 16 80 143 Cash payments (67 ) — — (9 ) (133 ) (209 ) Non-cash charges and other — 30 (14 ) (6 ) — 10 Liability as of December 29, 2018 $ 93 $ — $ — $ 1 $ 10 $ 104 2019 restructuring charges 49 (5 ) — 21 48 113 Cash payments (81 ) — — (10 ) (57 ) (148 ) Non-cash charges and other — 5 — (12 ) — (7 ) Liability as of December 28, 2019 $ 61 $ — $ — $ — $ 1 $ 62

Equity

Equity	12 Months Ended
	Dec. 28, 2019
Equity [Abstract]
Equity	EQUITY Earnings per share Basic earnings per share is determined by dividing net income attributable to Kellogg Company by the weighted average number of common shares outstanding during the period. Diluted earnings per share is similarly determined, except that the denominator is increased to include the number of additional common shares that would have been outstanding if all dilutive potential common shares had been issued. Dilutive potential common shares consist principally of employee stock options issued by the Company, restricted stock units, and to a lesser extent, certain contingently issuable performance shares. The total number of anti-dilutive potential common shares excluded from the reconciliation for each period was (shares in millions): 2019 - 14.0 ; 2018 - 6.5 ; 2017- 4.9 . Stock transactions The Company issues shares to employees and directors under various equity-based compensation and stock purchase programs, as further discussed in Note 9 . The number of shares issued and outstanding during the periods presented was (shares in millions): 2019 – 15 ; 2018 – 8 ; 2017– 7 . The Company issued shares totaling less than one million in each of the years presented under Kellogg Direct ™ , a direct stock purchase and dividend reinvestment plan for U.S. shareholders. In December 2017, the board of directors approved an authorization to repurchase up to $1.5 billion of the Company's common stock beginning in 2018 through December 2019. In February 2020, the board of directors approved a new authorization to repurchase up to $1.5 billion of the Company's common stock through December 2022. During 2019 , the Company repurchased 4 million shares of common stock for a total of $220 million . During 2018 , the Company repurchased 5 million shares of common stock for a total of $320 million . During 2017, the Company repurchased 7 million shares of common stock at a total cost of $516 million . Comprehensive income Comprehensive income includes net income and all other changes in equity during a period except those resulting from investments by or distributions to shareholders. Other comprehensive income for all years presented consists of foreign currency translation adjustments, fair value adjustments associated with cash flow hedges and adjustments for net experience gains (losses) and prior service credit (cost) related to employee benefit plans. During the years ended December 28, 2019 and December 30, 2017, the Company modified assumptions for a U.S. postemployment benefit plan. As a result, a net experience gain (loss) was recognized in other comprehensive income with an offsetting reduction in the accumulated postemployment benefit obligation. See Note 10 and Note 11 for further details. 2019 2018 2017 Pre-tax Tax (expense) After-tax Pre-tax Tax (expense) After-tax Pre-tax Tax (expense) After-tax amount benefit amount amount benefit amount amount benefit amount Net income $ 977 $ 1,344 $ 1,254 Other comprehensive income: Foreign currency translation adjustments $ 100 $ (19 ) 81 $ 5 $ (53 ) $ (48 ) $ (34 ) 113 79 Cash flow hedges: Unrealized gain (loss) on cash flow hedges 5 (1 ) 4 3 (1 ) 2 — — — Reclassification to net income 4 (1 ) 3 8 (2 ) 6 9 (3 ) 6 Postretirement and postemployment benefits: Amounts arising during the period: Net experience gain (loss) (16 ) 5 (11 ) (8 ) 1 (7 ) 44 (12 ) 32 Prior service credit (cost) 3 (1 ) 2 1 — 1 — — — Reclassification to net income: Net experience (gain) loss (5 ) 1 (4 ) (5 ) 1 (4 ) — — — Prior service (credit) cost (1 ) — (1 ) — — — 1 — 1 Available-for-sale securities: Unrealized gain (loss) 4 — 4 — — — — — — Reclassification to net income (4 ) — (4 ) — — — — — — Other comprehensive income (loss) $ 90 $ (16 ) $ 74 $ 4 $ (54 ) $ (50 ) $ 20 $ 98 $ 118 Comprehensive income $ 1,051 $ 1,294 $ 1,372 Net income (loss) attributable to noncontrolling interests 17 8 — Other comprehensive income (loss) attributable to noncontrolling interests — (7 ) — Comprehensive income attributable to Kellogg Company $ 1,034 $ 1,293 $ 1,372 Reclassifications from Accumulated Other Comprehensive Income (AOCI) for the year ended December 28, 2019 and December 29, 2018 , consisted of the following: Details about AOCI Components Amount reclassified from AOCI Line item impacted within Income Statement (millions) 2019 2018 2017 (Gains) and losses on cash flow hedges: Foreign currency exchange contracts $ — $ — $ (1 ) COGS Interest rate contracts 4 8 10 Interest expense $ 4 $ 8 $ 9 Total before tax (1 ) (2 ) (3 ) Tax expense (benefit) $ 3 $ 6 $ 6 Net of tax Amortization of postretirement and postemployment benefits: Net experience (gains) $ (5 ) $ (5 ) $ — OIE Prior service (credit) cost (1 ) — 1 OIE $ (6 ) $ (5 ) $ 1 Total before tax 1 1 — Tax expense (benefit) $ (5 ) $ (4 ) $ 1 Net of tax (Gains) losses on available-for-sale securities Corporate bonds $ (4 ) $ — $ — OIE $ (4 ) $ — $ — Total before tax — — — Tax expense (benefit) $ (4 ) $ — $ — Net of tax Total reclassifications $ (6 ) $ 2 $ 7 Net of tax Accumulated other comprehensive income (loss) as of December 28, 2019 and December 29, 2018 consisted of the following: (millions) December 28, 2019 December 29, 2018 Foreign currency translation adjustments $ (1,399 ) $ (1,467 ) Cash flow hedges — unrealized net gain (loss) (60 ) (53 ) Postretirement and postemployment benefits: Net experience gain (loss) 7 23 Prior service credit (cost) 4 (3 ) Total accumulated other comprehensive income (loss) $ (1,448 ) $ (1,500 )

Leases and Other Commitments

Leases and Other Commitments	12 Months Ended
	Dec. 28, 2019
Leases [Abstract]
Leases and other commitments	LEASES AND OTHER COMMITMENTS The Company leases certain warehouses, equipment, vehicles, and office space primarily through operating lease agreements. Finance lease obligations and activity are not material to the Consolidated Financial Statements. Lease obligations are primarily for real estate assets, with the remainder related to manufacturing and distribution related equipment, vehicles, information technology equipment, and rail cars. Leases with an initial term of 12 months or less are not recorded on the balance sheet. A portion of the Company's real estate leases include future variable rental payments that include inflationary adjustment factors. The future variability of these adjustments is unknown and therefore not included in the minimum lease payments. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants. The leases have remaining terms which range from less than 1 year to 12 years and the majority of leases provide the Company with the option to exercise one or more renewal terms. The length of the lease term used in recording lease assets and lease liabilities is based on the contractually required lease term adjusted for any options to renew or early terminate the lease that are reasonably certain of being executed. The Company combines lease and non-lease components together in determining the minimum lease payments for the majority of leases. The Company has elected to not combine lease and non-lease components for assets controlled indirectly through third party service-related agreements that include significant production related costs. The Company has closely analyzed these agreements to ensure any embedded costs related to the securing of the leased asset is properly segregated and accounted for in measuring the lease assets and liabilities. The majority of the leases do not include a stated interest rate, and therefore the Company's periodic incremental borrowing rate is used to determine the present value of lease payments. This rate is calculated based on a collateralized rate for the specific currencies used in leasing activities and the borrowing ability of the applicable Company legal entity. For the initial implementation of the lease standard, the incremental borrowing rate at December 29, 2018 was used to present value operating lease assets and liabilities. The Company recorded operating lease costs of $133 million for the year ended December 28, 2019. Lease related costs associated with variable rent, short-term leases, and sale-leaseback arrangements, as well as sublease income, are each immaterial. (millions) Year ended December 28, 2019 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 134 Right-of-use assets obtained in exchange for new operating lease liabilities $ 164 Weighted-average remaining lease term - operating leases 7 years Weighted-average discount rate - operating leases 2.9% At December 28, 2019, future maturities of operating leases were as follows: (millions) Operating leases 2020 $ 129 2021 98 2022 80 2023 67 2024 55 2025 and beyond 181 Total minimum payments $ 610 Less interest (63 ) Present value of lease liabilities $ 547 Operating lease payments presented in the table above exclude $18 million of minimum lease payments for real-estate leases signed but not yet commenced. The leases are expected to commence in 2020. Under the previous lease standard (Topic 840), at December 29, 2018, future minimum annual lease commitments under non-cancelable operating leases were as follows: (millions) Operating leases 2019 $ 121 2020 97 2021 73 2022 57 2023 48 2024 and beyond 129 Total minimum payments $ 525 Rent expense on operating leases for the year ended December 29, 2018 and December 30, 2017 were $133 million and $195 million respectively. At December 29, 2018, future minimum annual lease commitments under non-cancelable finance leases were immaterial. The Company has provided various standard indemnifications in agreements to sell and purchase business assets and lease facilities over the past several years, related primarily to pre-existing tax, environmental, and employee benefit obligations. Certain of these indemnifications are limited by agreement in either amount and/or term and others are unlimited. The Company has also provided various “hold harmless” provisions within certain service type agreements. Because the Company is not currently aware of any actual exposures associated with these indemnifications, management is unable to estimate the maximum potential future payments to be made. At December 28, 2019, the Company had not recorded any liability related to these indemnifications.

Debt

Debt	12 Months Ended
	Dec. 28, 2019
Debt [Abstract]
Long-term Debt [Text Block]	DEBT The following table presents the components of notes payable at year end December 28, 2019 and December 29, 2018 : (millions) 2019 2018 Principal amount Effective interest rate Principal amount Effective interest rate U.S. commercial paper $ 3 1.78 % $ 15 2.75 % Europe commercial paper — — — — Bank borrowings 104 161 Total $ 107 $ 176 The following table presents the components of long-term debt at year end December 28, 2019 and December 29, 2018 : (millions) 2019 2018 (a) 4.50% U.S. Dollar Notes due 2046 $ 638 $ 638 (b) 7.45% U.S. Dollar Debentures due 2031 621 621 (c) 4.30% U.S. Dollar Notes due 2028 595 595 (d) 3.40% U.S. Dollar Notes due 2027 596 595 (e) 3.25% U.S. Dollar Notes due 2026 741 731 (f) 1.25% Euro Notes due 2025 689 693 (g) 1.00% Euro Notes due 2024 692 697 (h) 2.65% U.S. Dollar Notes due 2023 539 585 (i) 2.75% U.S. Dollar Notes due 2023 201 198 (j) 3.125% U.S. Dollar Notes due 2022 353 351 (k) 0.80% Euro Notes due 2022 669 684 (l) 1.75% Euro Notes due 2021 558 570 (m) 3.25% U.S. Dollar Notes due 2021 198 399 (n) 4.0% U.S. Dollar Notes due 2020 601 848 (o) 4.15% U.S. Dollar Notes due 2019 — 503 Other 124 9 7,815 8,717 Less current maturities (620 ) (510 ) Balance at year end $ 7,195 $ 8,207 (a) In March 2016, the Company issued $650 million of thirty-year 4.50% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.59% at December 28, 2019. (b) In March 2001, the Company issued long-term debt instruments, primarily to finance the acquisition of Keebler Foods Company, of which $625 million of thirty-year 7.45% Debentures remain outstanding. The effective interest rate on the Debentures, reflecting issuance discount and hedge settlement, was 7.56% at December 28, 2019. The Debentures contain standard events of default and covenants, and can be redeemed in whole or in part by the Company at any time at prices determined under a formula (but not less than 100% of the principal amount plus unpaid interest to the redemption date). (c) In May 2018, the Company issued $600 million of ten-year 4.30% Senior Notes due 2028, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.34% at December 28, 2019. (d) In November 2017, the Company issued $600 million of ten-year 3.40% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of Chicago Bar Company LLC, the maker of RXBAR. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 3.49% at December 28, 2019. (e) In March 2016, the Company issued $750 million of ten-year 3.25% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 4.11% at December 28, 2019 . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling $450 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $6 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (f) In March 2015, the Company issued €600 million (approximately $671 million at December 28, 2019 , which reflects the discount, fees and translation adjustments) of ten-year 1.25% Euro Notes due 2025, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 1.58% at December 28, 2019 . The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. In May 2017, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized gain of $20 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (g) In May 2016, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount, fees and translation adjustments) of eight-year 1.00% Euro Notes due 2024. The proceeds from these Notes were used for general corporate purposes, including, together with cash on hand and additional commercial paper borrowings, repayment of the Company's $750 million , seven-year 4.45% U.S. Dollar Notes due 2016 at maturity. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 0.21% at December 28, 2019 . In November 2016, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. The Company subsequently terminated these swaps. In May of 2019, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The fair value adjustment for the interest rate swaps was $3 million at December 28, 2019 , recorded as an increase in the hedged debt balance. (h) In November 2016, the Company issued $600 million of seven-year 2.65% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of the Company's 1.875% U.S. Dollar Notes due 2016 at maturity and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 3.39% at December 28, 2019 . In 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $50 million of the Notes. In connection with the debt redemption, the Company incurred $2 million of interest expense, consisting primarily of a premium on the tender offer. (i) In February 2013, the Company issued $400 million ( $189 million previously redeemed) of ten-year 2.75% U.S. Dollar Notes, using net proceeds from these Notes for general corporate purposes, including, together with cash on hand, to repay a portion of the Company’s $750 million 4.25% U.S. Dollar Notes that matured in March 2013. The effective interest rate on these Notes, reflecting issuance discount hedge settlement and interest rate swaps, was 4.11% . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $211 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (j) In May 2012, the Company issued $700 million ( $342 million previously redeemed) of ten-year 3.125% U.S. Dollar Notes, using the net proceeds from these Notes for general corporate purposes, including financing a portion of the acquisition of Pringles. The effective interest rate on these Notes, reflecting issuance discount and interest rate swaps, was 3.74% at December 28, 2019 . During 2016 and 2018, the Company entered into interest rate swaps which effectively converted all or a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting $4 million loss at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (k) In May 2017, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount and translation adjustments) of five-year 0.80% Euro Notes due 2022, using the proceeds from these Notes for general corporate purposes, including, repayment of the Company's $400 million , five-year 1.75% U.S. Dollar Notes due 2017 at maturity. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 0.87% . The Notes were designated as a net investment hedge of the Company's investment in its Europe subsidiary when issued. (l) In May 2014, the Company issued €500 million (approximately $559 million at December 28, 2019 , which reflects the discount and translation adjustments) of seven-year 1.75% Euro Notes due 2021, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 2.37% at December 28, 2019. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. (m) In May 2018, the Company issued $400 million of three-year 3.25% Senior Notes due 2021, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount, was 3.39% as December 28, 2019. In 2019, the Company redeemed $202 million of the Notes. In connection with the dept redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer. (n) In December 2010, the Company issued $1.0 billion ( $150 million previously redeemed) of ten-year 4.0% fixed rate U.S. Dollar Notes, using the net proceeds from these Notes for incremental pension and postretirement benefit plan contributions and to retire a portion of its commercial paper. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 3.37% at December 28, 2019 . During 2016, the Company entered into interest rate swaps, which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps and the resulting gain on termination at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $248 million of the Notes. In connection with the debt redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer, which was partially offset by accelerated gains on pre-issuance interest rate hedges. (o) In November 2009, the Company issued $500 million of ten-year 4.15% fixed rate U.S. Dollar Notes, using net proceeds from these Notes to retire a portion of its 6.6% U.S. Dollar Notes due 2011. In 2012 and 2015, the Company entered into interest rate swaps which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In 2019, the Company redeemed $191 million of the Notes. In connection with the August 2019 debt redemption, the Company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer. In September of 2019, the Company redeemed the remaining $309 million of the Notes. In connection with the September 2019 debt redemption, the company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer. In August 2019, the Company redeemed $191 million of its 4.15% U.S. Dollar Notes due November 2019, $248 million of its 4.00% U.S. Dollar Notes due 2020, $202 million of its 3.25% U.S. Dollar Notes due 2021, and $50 million of its 2.65% U.S. Dollar Notes due 2023. In connection with the debt redemption, the Company incurred $15 million of interest expense, consisting primarily of a premium on the tender offer, acceleration of unamortized debt discount on the redeemed debt, and fees related to the tender offer, partially offset by accelerated gains on pre-issuance interest rate hedges. In September 2019, the Company redeemed $309 million of its 4.15% U.S. Dollar Notes due November 2019, the remaining principal balance subsequent to the August redemption. In connection with the debt redemption, the Company incurred $1 million of interest expense, consisting primarily of a premium and also including accelerated losses on pre-issuance interest rate hedges, acceleration of fees and debt discount on the redeemed debt and fees related to the make whole call. All of the Company’s Notes contain customary covenants that limit the ability of the Company and its restricted subsidiaries (as defined) to incur certain liens or enter into certain sale and lease-back transactions and also contain a change of control provision. There are no significant restrictions on the payment of dividends by the Company. The Company was in compliance with all these covenants as of December 28, 2019. The Company and two of its subsidiaries (the Issuers) maintain a program under which the Issuers may issue euro-commercial paper notes up to a maximum aggregate amount outstanding at any time of $750 million or its equivalent in alternative currencies. The notes may have maturities ranging up to 364 days and will be senior unsecured obligations of the applicable Issuer. Notes issued by subsidiary Issuers will be guaranteed by the Company. The notes may be issued at a discount or may bear fixed or floating rate interest or a coupon calculated by reference to an index or formula. There were no commercial paper notes outstanding under this program as of December 28, 2019 and December 29, 2018. At December 28, 2019 , the Company had $3.0 billion of short-term lines of credit and letters of credit, of which $2.9 billion were unused and available for borrowing primarily on an unsecured basis. These lines were comprised principally of the January 2018 unsecured $1.5 billion Five-Year Credit Agreement, which expires in 2023, and an unsecured $1.0 billion 364-Day Credit Agreement. The Five-Year Credit Agreement allows the Company to borrow, on a revolving credit basis, up to $1.5 billion , which includes the ability to obtain letters of credit in an aggregate stated amount up to $75 million and to obtain European swingline loans in an aggregate principal amount up to the equivalent of $300 million . In January 2020, the Company entered into an unsecured 364-Day Credit Agreement to borrow, on a revolving credit basis, up to $1.0 billion at any time outstanding, to replace the $1.0 billion 364-day facility that expired in January 2020. The Five-Year and 364 Day Credit Agreements which had no outstanding borrowings as December 28, 2019, contain customary covenants and warranties, including specified restrictions on indebtedness, liens and a specified interest expense coverage ratio. If an event of default occurs, then, to the extent permitted, the administrative agents may terminate the commitments under the credit facilities, accelerate any outstanding loans under the agreements, and demand the deposit of cash collateral equal to the lender's letter of credit exposure plus interest. During the third quarter of 2019, in connection with the divestiture of selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cones businesses, the Company withdrew from two multi-employer pension plans and recorded withdrawal liabilities of $132 million . While this represents our best estimate of the cost of withdrawing from the plans at this time, we have not yet reached agreement on the ultimate amount of the withdrawal liability. Subsequent to the end of the year, the Company and the lenders under the Five-Year and 364-Day Credit agreements entered into a waiver agreement addressing any matters that arose or may arise from these liabilities under the agreements, as long as the aggregate amount of such liabilities does not exceed $250 million . The Company was in compliance with all financial covenants contained in these agreements at December 28, 2019 . Scheduled principal repayments on long-term debt are (in millions): 2020– $620 ; 2021– $835 ; 2022– $1,039 ; 2023– $771 ; 2024– $677 ; 2025 and beyond– $3,896 . Financial institutions have issued standby letters of credit conditionally guaranteeing obligations on behalf of the Company totaling $87 million , including $52 million secured and $35 million unsecured, as of December 28, 2019. These obligations are related primarily to insurance programs. There were no amounts drawn down on the letters of credit as of December 28, 2019. The Company has issued guarantees for a certain portion of debt of unconsolidated affiliates. These arrangements include cross guarantees back from the other shareholder in proportion to their ownership of the unconsolidated affiliates. These guarantees are not material to the Company. Interest expense capitalized as part of the construction cost of fixed assets was immaterial for all periods presented.

Stock Compensation

Stock Compensation	12 Months Ended
	Dec. 28, 2019
Share-based Payment Arrangement [Abstract]
Stock Compensation [Text Block]	STOCK COMPENSATION The Company uses various equity-based compensation programs to provide long-term performance incentives for its global workforce. Currently, these incentives consist principally of stock options, restricted stock units and, to a lesser extent, executive performance shares. The Company also sponsors a discounted stock purchase plan in the United States and matching-grant programs in several international locations. Additionally, the Company awards restricted stock to its outside directors. These awards are administered through several plans, as described within this Note. The 2017 Long-Term Incentive Plan (2017 Plan), approved by shareholders in 2017, permits awards to employees and officers in the form of incentive and non-qualified stock options, performance units, restricted stock or restricted stock units, and stock appreciation rights. The 2017 Plan, which replaced the 2013 Long-Term Incentive Plan (2013 Plan), authorizes the issuance of a total of (a) 16 million shares; plus (b) the total number of shares remaining available for future grants under the 2013 Plan. The total number of shares remaining available for issuance under the 2017 Plan will be reduced by two shares for each share issued pursuant to an award under the 2017 Plan other than a stock option or stock appreciation right, or potentially issuable pursuant to an outstanding award other than a stock option or stock appreciation right, which will in each case reduce the total number of shares remaining by one share for each share issued. At December 29, 2018, there were 17 million remaining authorized, but unissued, shares under the 2017 Plan. Compensation expense for all types of equity-based programs and the related income tax benefit recognized were as follows: (millions) 2019 2018 2017 Pre-tax compensation expense $ 61 $ 64 $ 71 Related income tax benefit $ 16 $ 16 $ 26 As of December 28, 2019 , total stock-based compensation cost related to non-vested awards not yet recognized was $87 million and the weighted-average period over which this amount is expected to be recognized was 2 years . Cash flows realized upon exercise or vesting of stock-based awards in the periods presented are included in the following table. Tax windfall (shortfall) realized upon exercise or vesting of stock-based awards generally represent the difference between the grant date fair value of an award and the taxable compensation of an award. Cash used by the Company to settle equity instruments granted under stock-based awards was not material. (millions) 2019 2018 2017 Total cash received from option exercises and similar instruments $ 64 $ 167 $ 97 Tax windfall (shortfall) classified as cash flow from operating activities $ (2 ) $ 11 $ 4 Shares used to satisfy stock-based awards are normally issued out of treasury stock, although management is authorized to issue new shares to the extent permitted by respective plan provisions. Refer to Note 6 for information on shares issued during the periods presented to employees and directors under various long-term incentive plans and share repurchases under the Company’s stock repurchase authorizations. The Company does not currently have a policy of repurchasing a specified number of shares issued under employee benefit programs during any particular time period. Stock options During the periods presented, non-qualified stock options were granted to eligible employees under the 2017 and 2013 Plans with exercise prices equal to the fair market value of the Company’s stock on the grant date, a contractual term of ten years , and a three-year graded vesting period. Management estimates the fair value of each annual stock option award on the date of grant using a lattice-based option valuation model. Composite assumptions are presented in the following table. Weighted-average values are disclosed for certain inputs which incorporate a range of assumptions. Expected volatilities are based principally on historical volatility of the Company’s stock, and to a lesser extent, on implied volatilities from traded options on the Company’s stock. Historical volatility corresponds to the contractual term of the options granted. The Company uses historical data to estimate option exercise and employee termination within the valuation models; separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. The expected term of options granted represents the period of time that options granted are expected to be outstanding; the weighted-average expected term for all employee groups is presented in the following table. The risk-free rate for periods within the contractual life of the options is based on the U.S. Treasury yield curve in effect at the time of grant. Stock option valuation model assumptions for grants within the year ended: 2019 2018 2017 Weighted-average expected volatility 18.00 % 18.00 % 18.00 % Weighted-average expected term (years) 6.60 6.60 6.60 Weighted-average risk-free interest rate 2.59 % 2.82 % 2.26 % Dividend yield 3.90 % 3.00 % 2.80 % Weighted-average fair value of options granted $ 6.78 $ 10.00 $ 10.14 A summary of option activity for the year ended December 28, 2019 is presented in the following table: Employee and director stock options Shares (millions) Weighted- average exercise price Weighted- average remaining contractual term (yrs.) Aggregate intrinsic value (millions) Outstanding, beginning of year 14 $ 66 Granted 3 57 Exercised (1 ) 56 Forfeitures and expirations (2 ) 67 Outstanding, end of year 14 $ 65 4.9 $ 55 Exercisable, end of year 10 $ 65 6.1 $ 86 Additionally, option activity for the comparable prior year periods is presented in the following table: (millions, except per share data) 2018 2017 Outstanding, beginning of year 14 15 Granted 3 2 Exercised (2 ) (2 ) Forfeitures and expirations (1 ) (1 ) Outstanding, end of year 14 14 Exercisable, end of year 10 10 Weighted-average exercise price: Outstanding, beginning of year $ 64 $ 62 Granted 70 73 Exercised 58 57 Forfeitures and expirations 71 70 Outstanding, end of year $ 66 $ 64 Exercisable, end of year $ 63 $ 60 The total intrinsic value of options exercised during the periods presented was (in millions): 2019– $7 ; 2018– $33 ; 2017– $22 . Other stock-based awards During the periods presented, other stock-based awards consisted principally of executive performance shares and restricted stock granted under the 2017 and 2013 Plans. In the first quarter of 2019, the Company granted performance shares to a limited number of senior executive-level employees, which entitle these employees to receive a specified number of shares of the Company's common stock upon vesting, as well as dividend equivalent shares. The number of shares earned could range between 0 and 200% of the target amount depending upon performance achieved over the three year vesting period. The performance conditions of the award include three year currency-neutral net sales growth and total shareholder return (TSR) of the Company's common stock relative to a select group of peer companies. Dividend equivalents accrue and vest in accordance with the underlying award. A Monte Carlo valuation model was used to determine the fair value of the awards. The TSR performance metric is a market condition. Therefore, compensation cost of the TSR condition is fixed at the measurement date and is not revised based on actual performance. The TSR metric was valued as a multiplier of possible levels of currency- neutral comparable operating margin expansion. Compensation cost related to currency-neutral net sales growth performance is revised for changes in the expected outcome. The 2019 target grant currently corresponds to approximately 223,000 shares, with a grant-date fair value of $59 per share. In 2018, the Company granted performance shares to a limited number of senior executive-level employees, which entitle these employees to receive a specified number of shares of the Company's common stock upon vesting. The number of shares earned could range between 0 and 200% of the target amount depending upon performance achieved over the three year vesting period. The performance conditions of the award include three-year currency-neutral comparable operating margin expansion and total shareholder return (TSR) of the Company's common stock relative to a select group of peer companies. The 2018 target grant currently corresponds to approximately 143,000 shares, with a grant-date fair value of $88 per share. In 2017, the Company granted performance shares to a limited number of senior executive-level employees, which entitle these employees to receive a specified number of shares of the Company's common stock upon vesting. The number of shares earned could range between 0 and 200% of the target amount depending upon performance achieved over the three year vesting period. The performance conditions of the award include three-year currency neutral adjusted operating profit growth and TSR of the Company's common stock relative to a select group of peer companies. The 2017 target grant currently corresponds to approximately 100,000 shares, with a grant-date fair value of $50 per share. Based on the market price of the Company’s common stock at year-end 2019, the maximum future value that could be awarded on the vesting date was (in millions): 2019 award– $31 ; 2018 award– $20 ; and 2017 award– $13 . The 2016 performance share award, payable in stock, was settled at 88% of target in February 2019 for a total dollar equivalent of $7 million . The Company also grants restricted stock units to eligible employees under the 2017 Plan, typically with three year cliff vesting earning dividend equivalent units for awards granted beginning in 2019. Dividend equivalents accrue and vest in accordance with the underlying award. Management estimates the fair value of restricted stock grants based on the market price of the underlying stock on the date of grant. A summary of restricted stock unit activity for the year ended December 28, 2019 , is presented in the following table: Employee restricted stock and restricted stock units Shares (thousands) Weighted- average grant-date fair value Non-vested, beginning of year 1,708 $ 65 Granted 287 55 Vested (469 ) 68 Forfeited (340 ) 62 Non-vested, end of year 1,186 $ 61 Additionally, restricted stock unit activity for 2018 and 2017 is presented in the following table: Employee restricted stock and restricted stock units 2018 2017 Shares (in thousands): Non-vested, beginning of year 1,673 1,166 Granted 772 776 Vested (507 ) (109 ) Forfeited (230 ) (160 ) Non-vested, end of year 1,708 1,673 Weighted-average exercise price: Non-vested, beginning of year $ 65 $ 63 Granted 63 65 Vested 59 58 Forfeited 64 65 Non-vested, end of year $ 65 $ 65 The total fair value of restricted stock units vesting in the periods presented was (in millions): 2019– $27 ; 2018– $35 ; 2017– $5 .

Pension Benefits

Pension Benefits	12 Months Ended
	Dec. 28, 2019
Pension Benefits [Abstract]
Pension Benefits [Text Block]	PENSION BENEFITS The Company sponsors a number of U.S. and foreign pension plans to provide retirement benefits for its employees. The majority of these plans are funded or unfunded defined benefit plans, although the Company does participate in a limited number of multiemployer or other defined contribution plans for certain employee groups. See Note 12 for more information regarding the Company’s participation in multiemployer plans. Defined benefits for salaried employees are generally based on salary and years of service, while union employee benefits are generally a negotiated amount for each year of service. The Company uses a December 31 measurement date for these plans and, when necessary, adjusts for plan contributions and significant events between December 31 and its fiscal year-end. In September 2019, the Company provided a voluntary one-time lump-sum cash settlement offer to certain eligible terminated vested participants in our U.S. pension plans in order to reduce pension obligations and administrative costs. In December 2019, approximately $174 million was distributed from pension plan assets in connection with this offer. In conjunction with the completion of the sale of selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cones businesses on July 28, 2019, the Company recognized a curtailment gain in its U.S. pension plans of $11 million . In September 2018, the Company recognized a curtailment gain of $30 million as certain European pension plans were frozen as of December 29, 2018 in conjunction with Project K restructuring. In September 2017, the Company amended certain defined benefit pension plans in the U.S. and Canada for salaried employees. As of December 31, 2018, the amendment froze compensation and service periods used to calculate pension benefits for active salaried employees who participate in the affected pension plans. During the third quarter of 2017, the Company recognized related pension curtailment gains totaling $136 million included within Project K restructuring activity. Beginning January 1, 2019, impacted employees will not accrue additional benefits for future service and eligible compensation received under these plans. Concurrently, the Company also amended its 401(k) savings plans effective January 1, 2019, to make previously ineligible salaried U.S. and Canada employees eligible for Company retirement contributions, which range from 3% to 7% of eligible compensation based on the employee’s length of employment. Obligations and funded status The aggregate change in projected benefit obligation, plan assets, and funded status is presented in the following tables. (millions) 2019 2018 Change in projected benefit obligation Beginning of year $ 5,117 $ 5,648 Service cost 36 87 Interest cost 172 165 Plan participants’ contributions 1 1 Amendments 3 6 Actuarial (gain)loss 766 (384 ) Benefits paid (458 ) (280 ) Curtailment and special termination benefits (13 ) (36 ) Other — 1 Foreign currency adjustments 30 (91 ) End of year $ 5,654 $ 5,117 Change in plan assets Fair value beginning of year $ 4,677 $ 5,043 Actual return on plan assets 874 (299 ) Employer contributions 10 270 Plan participants’ contributions 1 1 Benefits paid (426 ) (236 ) Other — (1 ) Foreign currency adjustments 34 (101 ) Fair value end of year $ 5,170 $ 4,677 Funded status $ (484 ) $ (440 ) Amounts recognized in the Consolidated Balance Sheet consist of Other assets $ 241 $ 228 Other current liabilities (20 ) (17 ) Other liabilities (705 ) (651 ) Net amount recognized $ (484 ) $ (440 ) Amounts recognized in accumulated other comprehensive income consist of Prior service cost $ 37 $ 41 Net amount recognized $ 37 $ 41 The accumulated benefit obligation for all defined benefit pension plans was $5.6 billion and $5.0 billion at December 28, 2019 and December 29, 2018 , respectively. Information for pension plans with accumulated benefit obligations in excess of plan assets were: (millions) 2019 2018 Projected benefit obligation $ 4,061 $ 3,725 Accumulated benefit obligation $ 4,033 $ 3,689 Fair value of plan assets $ 3,362 $ 3,081 Expense The components of pension expense are presented in the following table. Service cost is recorded in COGS and SGA expense. All other components of net periodic benefit cost are included in OIE. Pension expense for defined contribution plans relates to certain foreign-based defined contribution plans and multiemployer plans in the United States in which the Company participates on behalf of certain unionized workforces. (millions) 2019 2018 2017 Service cost $ 36 $ 87 $ 96 Interest cost 172 165 164 Expected return on plan assets (340 ) (361 ) (371 ) Amortization of unrecognized prior service cost 7 8 9 Recognized net (gain) loss 235 269 (36 ) Net periodic benefit cost 110 168 (138 ) Curtailment and special termination benefits (13 ) (30 ) (151 ) Pension (income) expense: Defined benefit plans 97 138 (289 ) Defined contribution plans 20 27 34 Total $ 117 $ 165 $ (255 ) The estimated prior service cost for defined benefit pension plans that will be amortized from accumulated other comprehensive income into pension expense over the next fiscal year is approximately $7 million . The Company and certain of its subsidiaries sponsor 401(k) or similar savings plans for active employees. Expense related to these plans was (in millions): 2019 – $39 million ; 2018 – $38 million ; 2017 – $41 million . These amounts are not included in the preceding expense table. Company contributions to these savings plans approximate annual expense. Company contributions to multiemployer and other defined contribution pension plans approximate the amount of annual expense presented in the preceding table. Assumptions The worldwide weighted-average actuarial assumptions used to determine benefit obligations were: 2019 2018 2017 Discount rate 2.9 % 3.9 % 3.3 % Long-term rate of compensation increase 3.4 % 3.8 % 3.9 % The worldwide weighted-average actuarial assumptions used to determine annual net periodic benefit cost were: 2019 2018 2017 Discount rate 3.7 % 3.3 % 3.6 % Long-term rate of compensation increase 4.0 % 3.9 % 3.9 % Long-term rate of return on plan assets 7.3 % 7.4 % 8.1 % To determine the overall expected long-term rate of return on plan assets, the Company models expected returns over a 20-year investment horizon with respect to the specific investment mix of its major plans. The return assumptions used reflect a combination of rigorous historical performance analysis and forward-looking views of the financial markets including consideration of current yields on long-term bonds, price-earnings ratios of the major stock market indices, and long-term inflation. The U.S. model, which corresponds to approximately 72% of consolidated pension and other postretirement benefit plan assets, incorporates a long-term inflation assumption of 2.5% and an active management premium of 0.8% (net of fees) validated by historical analysis. Similar methods are used for various foreign plans with invested assets, reflecting local economic conditions. The expected rate of return for 2019 of 7.0% for the U.S. plans after the mid-year remeasurement, equated to approximately the 54th percentile expectation. Refer to Note 1 . In 2019, the Society of Actuaries (SOA) published updated mortality tables and an updated improvement scale. The expectations of future mortality rates in the new SOA tables were consistent with prior Kellogg mortality assumptions. In determining the appropriate mortality assumptions as of 2019 fiscal year-end, the Company adopted the new SOA tables with collar adjustments based on Kellogg’s current population. In addition, based on mortality information available from the Social Security Administration and other sources, the Company developed assumptions for future mortality improvement in line with our expectations for future experience. The change to the mortality assumption increased year-end pension obligations by $77 million . To conduct the annual review of discount rates, the Company selected the discount rate based on a cash-flow matching analysis using Towers Watson’s proprietary RATE:Link tool and projections of the future benefit payments that constitute the projected benefit obligation for the plans. RATE:Link establishes the uniform discount rate that produces the same present value of the estimated future benefit payments, as is generated by discounting each year’s benefit payments by a spot rate applicable to that year. The measurement dates for the defined benefit plans are consistent with the Company’s fiscal year end. Accordingly, the Company selects yield curves to measure benefit obligations consistent with market indices during December of each year. Plan assets The Company categorized Plan assets within a three level fair value hierarchy described as follows: Investments stated at fair value as determined by quoted market prices (Level 1) include: Cash and cash equivalents: Value based on cost, which approximates fair value. Corporate stock, common: Value based on the last sales price on the primary exchange. Investments stated at estimated fair value using significant observable inputs (Level 2) include: Cash and cash equivalents: Institutional short-term investment vehicles valued daily. Mutual funds: Valued at exit prices quoted in active or non-active markets or based on observable inputs. Collective trusts : Valued at exit prices quoted in active or non-active markets or based on observable inputs. Bonds: Value based on matrices or models from pricing vendors. Limited partnerships: Value based on the ending net capital account balance at year end. Investments stated at estimated fair value using significant unobservable inputs (Level 3) include: Real estate: Value based on the net asset value of units held at year end. The fair value of real estate holdings is based on market data including earnings capitalization, discounted cash flow analysis, comparable sales transactions or a combination of these methods. Bonds: Value based on matrices or models from brokerage firms. A limited number of the investments are in default. The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. The Company’s practice regarding the timing of transfers between levels is to measure transfers in at the beginning of the month and transfers out at the end of the month. For the year ended December 28, 2019 , the Company had no transfers between Levels 1 and 2. The fair value of Plan assets as of December 28, 2019 summarized by level within the fair value hierarchy are as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 14 $ — $ — $ — $ 14 Corporate stock, common: Domestic 338 — — — 338 International 16 — — — 16 Mutual funds: International equity — — — 36 36 Domestic debt — 4 — — 4 Collective trusts: Domestic equity — — — 498 498 International equity — 117 — 816 933 Other international debt — 718 — 378 1,096 Limited partnerships — — — 228 228 Bonds, corporate — 443 — 211 654 Bonds, government — 774 — — 774 Bonds, other — 70 — — 70 Real estate — — — 412 412 Other — 61 — 36 97 Total $ 368 $ 2,187 $ — $ 2,615 $ 5,170 (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. The fair value of Plan assets at December 29, 2018 are summarized as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 75 $ — $ — $ — $ 75 Corporate stock, common: Domestic 412 — — — 412 International 10 1 — — 11 Mutual funds: International equity — 7 — 34 41 Domestic debt — 53 — — 53 Collective trusts: Domestic equity — — — 437 437 International equity — 92 — 1,330 1,422 Other international debt — — — 331 331 Limited partnerships — — — 283 283 Bonds, corporate — 498 — — 498 Bonds, government — 562 — — 562 Bonds, other — 62 — — 62 Real estate — — — 378 378 Other — 55 — 57 112 Total $ 497 $ 1,330 $ — $ 2,850 $ 4,677 (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. There were no Level 3 assets during 2019 and 2018 and no unfunded commitments to purchase investments at December 28, 2019 or December 29, 2018 . The Company’s investment strategy for its major defined benefit plans is to maintain a diversified portfolio of asset classes with the primary goal of meeting long-term cash requirements as they become due. Assets are invested in a prudent manner to maintain the security of funds while maximizing returns within the Plan’s investment policy. The investment policy specifies the type of investment vehicles appropriate for the Plan, asset allocation guidelines, criteria for the selection of investment managers, procedures to monitor overall investment performance as well as investment manager performance. Derivatives, including swaps, forward and futures contracts, may be used as asset class substitutes or for hedging or other risk management purposes. It also provides guidelines enabling Plan fiduciaries to fulfill their responsibilities. The current weighted-average target asset allocation reflected by this strategy is: equity securities– 42% ; debt securities– 31% ; real estate and other– 27% . Investment in Company common stock represented 1.2% and 1.0% of consolidated plan assets at December 28, 2019 and December 29, 2018 , respectively. Plan funding strategies are influenced by tax regulations and funding requirements. The Company currently expects to contribute, before consideration of incremental discretionary contributions, approximately $7 million to its defined benefit pension plans during 2020. Benefit payments The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in millions): 2020– $274 ; 2021– $273 ; 2022– $281 ; 2023– $285 ; 2024– $294 ; 2025 to 2029– $1,508 .

Nonpension Postretirement and P

Nonpension Postretirement and Postemployment Benefits	12 Months Ended
	Dec. 28, 2019
Nonpension Postretirement And Postemployment Benefits [Abstract]
Nonpension Postretirement And Postemployment Benefits [Text Block]	NONPENSION POSTRETIREMENT AND POSTEMPLOYMENT BENEFITS Postretirement The Company sponsors a number of plans to provide health care and other welfare benefits to retired employees in the United States and Canada, who have met certain age and service requirements. The majority of these plans are funded or unfunded defined benefit plans, although the Company does participate in a limited number of multiemployer or other defined contribution plans for certain employee groups. The Company contributes to voluntary employee benefit association (VEBA) trusts to fund certain U.S. retiree health and welfare benefit obligations. The Company uses a December 31 measurement date for these plans and, when necessary, adjusts for plan contributions and significant events between December 31 and its fiscal year-end. Obligations and funded status The aggregate change in accumulated postretirement benefit obligation, plan assets, and funded status is presented in the following tables. (millions) 2019 2018 Change in accumulated benefit obligation Beginning of year $ 1,069 $ 1,190 Service cost 15 18 Interest cost 37 36 Actuarial (gain) loss 59 (105 ) Benefits paid (60 ) (67 ) Curtailments (6 ) — Amendments — — Foreign currency adjustments 2 (3 ) End of year $ 1,116 $ 1,069 Change in plan assets Fair value beginning of year $ 1,140 $ 1,292 Actual return on plan assets 282 (91 ) Employer contributions 18 17 Benefits paid (76 ) (78 ) Fair value end of year $ 1,364 $ 1,140 Funded status $ 248 $ 71 Amounts recognized in the Consolidated Balance Sheet consist of Other non-current assets $ 283 $ 107 Other current liabilities (2 ) (2 ) Other liabilities (33 ) (34 ) Net amount recognized $ 248 $ 71 Amounts recognized in accumulated other comprehensive income consist of Prior service credit (59 ) (68 ) Net amount recognized $ (59 ) $ (68 ) Expense Components of postretirement benefit expense (income) were: (millions) 2019 2018 2017 Service cost $ 15 $ 18 $ 18 Interest cost 37 36 37 Expected return on plan assets (86 ) (94 ) (98 ) Amortization of unrecognized prior service credit (9 ) (9 ) (9 ) Recognized net (gain) loss (137 ) 81 (90 ) Net periodic benefit cost (180 ) 32 (142 ) Curtailment (6 ) — 3 Postretirement benefit expense: Defined benefit plans (186 ) 32 (139 ) Defined contribution plans 11 11 16 Total $ (175 ) $ 43 $ (123 ) The estimated prior service credit that will be amortized from accumulated other comprehensive income into nonpension postretirement benefit expense over the next fiscal year is expected to be approximately $9 million . Assumptions The weighted-average actuarial assumptions used to determine benefit obligations were: 2019 2018 2017 Discount rate 3.3 % 4.3 % 3.6 % The weighted-average actuarial assumptions used to determine annual net periodic benefit cost were: 2019 2018 2017 Discount rate 4.0 % 3.6 % 4.0 % Long-term rate of return on plan assets 7.3 % 7.5 % 8.5 % The Company determines the overall discount rate and expected long-term rate of return on VEBA trust obligations and assets in the same manner as that described for pension trusts in Note 10 . The assumed U.S. health care cost trend rate is 5.25% for 2020, decreasing 0.25% annually to 4.5% by the year 2023 and remaining at that level thereafter. These trend rates reflect the Company’s historical experience and management’s expectations regarding future trends. A one percentage point change in assumed health care cost trend rates would have the following effects: (millions) One percentage point increase One percentage point decrease Effect on total of service and interest cost components $ 3 $ (2 ) Effect on postretirement benefit obligation 77 (66 ) Plan assets The fair value of Plan assets as of December 28, 2019 summarized by level within fair value hierarchy described in Note 10 , are as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 8 $ 1 $ — $ — $ 9 Corporate stock, common: Domestic 242 — — — 242 International 11 — — — 11 Mutual funds: Domestic equity — 35 — — 35 International equity — — — — — Domestic debt — 53 — — 53 Collective trusts: Domestic equity — — — 286 286 International equity — — — 293 293 Limited partnerships — — — 124 124 Bonds, corporate — 136 — — 136 Bonds, government — 77 — — 77 Bonds, other — 9 — — 9 Real estate — — — 88 88 Other — 1 — — 1 Total $ 261 $ 312 $ — $ 791 $ 1,364 (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. The fair value of Plan assets at December 29, 2018 are summarized as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 2 $ 1 $ — $ — $ 3 Corporate stock, common: Domestic 108 — — — 108 International 5 1 — — 6 Mutual funds: Domestic equity — 37 — — 37 International equity — — — — — Domestic debt — 42 — — 42 Collective trusts: Domestic equity — — — 281 281 International equity — — — 228 228 Limited partnerships — — — 199 199 Bonds, corporate — 95 — — 95 Bonds, government — 50 — — 50 Bonds, other — 7 — 83 90 Other — 1 — — 1 Total $ 115 $ 234 $ — $ 791 $ 1,140 (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. The Company’s asset investment strategy for its VEBA trusts is consistent with that described for its pension trusts in Note 10 . The current target asset allocation is 67% equity securities, 24% debt securities, and 9% real estate. The Company currently expects to contribute approximately $19 million to its VEBA trusts during 2020. There were no Level 3 assets during 2019 and 2018 . Postemployment Under certain conditions, the Company provides benefits to former or inactive employees, including salary continuance, severance, and long-term disability, in the United States and several foreign locations. The Company’s postemployment benefit plans are unfunded. Actuarial assumptions used are generally consistent with those presented for pension benefits in Note 10 . During 2019, the Company updated its incidence rate assumption based on a review of historical experience, resulting in an actuarial loss of approximately $7 million . The aggregate change in accumulated postemployment benefit obligation and the net amount recognized were: (millions) 2019 2018 Change in accumulated benefit obligation Beginning of year $ 42 $ 43 Service cost 3 3 Interest cost 2 1 Actuarial (gain)loss 8 3 Benefits paid (7 ) (8 ) Amendments — — Foreign currency adjustments — — End of year $ 48 $ 42 Funded status $ (48 ) $ (42 ) Amounts recognized in the Consolidated Balance Sheet consist of Other current liabilities $ (7 ) $ (5 ) Other liabilities (41 ) (37 ) Net amount recognized $ (48 ) $ (42 ) Amounts recognized in accumulated other comprehensive income consist of Net prior service cost $ 3 $ 4 Net experience gain (22 ) (38 ) Net amount recognized $ (19 ) $ (34 ) Components of postemployment benefit expense were: (millions) 2019 2018 2017 Service cost $ 3 $ 3 $ 6 Interest cost 2 1 3 Amortization of unrecognized prior service cost 1 1 1 Recognized net loss (5 ) (5 ) — Net periodic benefit cost $ 1 $ — $ 10 Settlement cost (3 ) — — Postemployment benefit expense $ (2 ) $ — $ 10 The estimated net experience gain and net prior service cost that will be amortized from accumulated other comprehensive income into postemployment benefit expense over the next fiscal year is $3 million and $1 million , respectively. Benefit payments The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: (millions) Postretirement Postemployment 2020 $ 66 $ 8 2021 67 6 2022 67 5 2023 68 5 2024 68 5 2025-2029 337 20

Multipemployer Pension and Post

Multipemployer Pension and Postretirement Plans	12 Months Ended
	Dec. 28, 2019
Multiemployer Plans [Abstract]
Multiemployer Plans [Text Block]	MULTIEMPLOYER PENSION AND POSTRETIREMENT PLANS The Company contributes to multiemployer defined contribution pension and postretirement benefit plans under the terms of collective-bargaining agreements that cover certain unionized employee groups in the United States. Contributions to these plans are included in total pension and postretirement benefit expense as reported in Note 10 and Note 11 , respectively. Pension benefits The risks of participating in multiemployer pension plans are different from single-employer plans. Assets contributed to a multiemployer plan by one employer may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan are borne by the remaining participating employers. The Company’s participation in multiemployer pension plans for the year ended December 28, 2019, is outlined in the table below. The “EIN/PN” column provides the Employer Identification Number (EIN) and the three-digit plan number (PN). The most recent Pension Protection Act (PPA) zone status available for 2019 and 2018 is for the plan year-ends as indicated below. The zone status is based on information that the Company received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are between 65 percent and 80 percent funded, and plans in the green zone are at least 80 percent funded. The “FIP/RP Status” column indicates plans for which a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented. In addition to regular plan contributions, the Company may be subject to a surcharge if the plan is in the red zone. The “Surcharge Imposed” column indicates whether a surcharge has been imposed on contributions to the plan. The last column lists the expiration date(s) of the collective-bargaining agreement(s) (CBA) to which the plans are subject. The Company was not listed in the available Forms 5500 of the three plans listed below as providing more than 5 percent of total contributions. At the date the Company’s financial statements were issued, certain Forms 5500 were not available for the plan years ending in 2019. PPA Zone Status Contributions (millions) Pension trust fund EIN/PN 2019 2018 FIP/RP Status 2019 2018 2017 Surcharge Imposed Expiration Date of CBA Bakery and Confectionery Union and Industry International Pension Fund (a) 52-6118572 / Red - 12/31/2019 Red - 12/31/2018 Implemented $ 5.9 $ 6.5 $ 6.6 Yes 12/17/2020 to Central States, Southeast and Southwest Areas Pension Fund 36-6044243 / Red - 12/31/2019 Red - 12/31/2018 Implemented 1.3 1.9 4.8 Yes (c) Western Conference of Teamsters Pension Trust 91-6145047 / Green - 12/31/2019 Green - 12/31/2018 NA 0.8 1.0 1.4 No 3/26/2022 (d) Other Plans 0.7 1.0 3.1 (e) Total contributions: $ 8.7 $ 10.4 $ 15.9 (a) The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 80 percent of the Company’s participants in this fund are covered by a single CBA that expires on 3/16/2021. (b) During 2017, the Company terminated certain CBAs covered by these funds. Because of the Company's level of continuing involvement in each fund, the Company does not anticipate being subject to a withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019. (c) During 2019, the Company terminated CBAs covered by this fund. As a result, the Company has withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect to make 2020 contributions. (d) During 2017, the Company terminated certain CBAs covered by this fund. As a result, the Company has partially withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019. (e) During 2017 and 2019, the Company terminated the CBAs covered by certain of these funds. As a result, for the impacted funds, the Company recognized expense for the estimated withdrawal liability in each year and no longer made contributions following the termination. The Company does not expect 2020 contributions to the remaining funds to be materially different from 2019. As discussed in Note 5, the Company engages in restructuring and cost reduction projects to help achieve its long-term growth targets. Current and future restructuring and cost reduction activities and other strategic initiatives could impact the Company's participation in certain multiemployer plans. In addition to regular contributions, the Company could be obligated to pay additional amounts, known as a withdrawal liability, if a multiemployer pension plan has unfunded vested benefits and the Company decreases or ceases participation in that plan. During 2019, the Company withdrew from two multi-employer pension plans. Additionally, the Company previously exited several multiemployer plans associated with Project K restructuring. The Company recognized expense related to the withdrawals as follows (millions): 2019 - $132 ; 2018 - $7 ; 2017 - $26 . While this is our best estimate of the ultimate cost of withdrawing from the plans at this time, we have not yet reached agreement on the ultimate amount of the withdrawal liability. As a result, the actual cost could differ from our estimate based on final funding assessments. The net present value of the liabilities were determined using a risk free interest rate. The charge was recorded within Cost of goods sold on the Consolidated Statement of Income and Other current liabilities and Other liabilities on the Consolidated Balance Sheet. The cash obligation associated with the 2019 withdrawal activity is approximately $8 million annually and is payable over a maximum 20-year period; management has not determined the actual period over which the payments will be made. Withdrawal liability payments of $8 million and $3 million were made during 2019 and 2018, respectively to multiemployer plans. Withdrawal liability payments made in 2017 were immaterial. The Company had withdrawal liabilities of $156 million and $32 million at December 28, 2019 and December 29, 2018, respectively. Postretirement benefits Multiemployer postretirement benefit plans provide health care and other welfare benefits to active and retired employees who have met certain age and service requirements. Contributions to multiemployer postretirement benefit plans were (in millions): 2019 – $11 ; 2018 – $11 ; 2017 – $16 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES The components of income before income taxes and the provision for income taxes were as follows: (millions) 2019 2018 2017 Income before income taxes United States $ 938 $ 851 $ 1,097 Foreign 367 478 560 1,305 1,329 1,657 Income taxes Currently payable Federal 345 7 358 State 52 28 31 Foreign 77 99 79 474 134 468 Deferred Federal (124 ) 109 (41 ) State (29 ) (59 ) 8 Foreign — (3 ) (25 ) (153 ) 47 (58 ) Total income taxes $ 321 $ 181 $ 410 The difference between the U.S. federal statutory tax rate and the Company’s effective income tax rate was: 2019 2018 2017 U.S. statutory income tax rate 21.0 % 21.0 % 35.0 % Foreign rates varying from U.S. statutory rate (2.5 ) (3.0 ) (6.7 ) Excess tax benefits on share-based compensation — (0.3 ) (0.3 ) State income taxes, net of federal benefit 1.3 1.5 1.4 Cost (benefit) of remitted and unremitted foreign earnings 0.8 0.7 0.1 Legal entity restructuring, deferred tax impact — (3.3 ) — Discretionary pension contributions — (2.3 ) — Revaluation of investment in foreign subsidiary 2.5 — — Net change in valuation allowance (1.6 ) 2.0 (0.4 ) U.S. deduction for qualified production activities — — (1.4 ) Statutory rate changes, deferred tax impact 0.3 — (9.0 ) U.S. deemed repatriation tax — (1.2 ) 10.4 Intangible property transfer — — (2.4 ) Divestiture 2.9 — — Out-of-period adjustment 3.0 — — Other (3.1 ) (1.5 ) (1.9 ) Effective income tax rate 24.6 % 13.6 % 24.8 % As presented in the preceding table, the Company’s 2019 consolidated effective tax rate was 24.6% , as compared to 13.6% in 2018 and 24.8% in 2017. The 2019 effective income tax rate was unfavorably impacted by a permanent basis difference in the assets sold to Ferrero as well as an out-of-period correction. During the fourth quarter of 2019, the Company recorded an out-of-period adjustment to correct an error in the tax rate applied to a deferred tax asset arising from an intangible property transfer in a prior year. The adjustment increased income tax expense and decreased deferred tax assets by $39 million , respectively. We determined the adjustment to be immaterial to our Consolidated Financial Statements for the year ended December 28, 2019 and related prior annual and quarterly periods. The 2018 effective income tax rate benefited from the reduction of the U.S. corporate tax rate as well as a $11 million reduction of income tax expense due to changes in estimates related to the Tax Cuts and Jobs Act, the impact of discretionary pension contributions totaling $250 million in 2018, which were designated as 2017 tax year contributions, and a $44 million discrete tax benefit as a result of the remeasurement of deferred taxes following a legal entity restructuring. The 2017 effective income tax rate benefited from a deferred tax benefit of $39 million resulting from intercompany transfers of intellectual property under the application of the newly adopted standard. See discussion regarding the adoption of ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory , in Note 1. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Tax Act). The Tax Act made broad and complex changes to the U.S. tax code which impacted our year ended December 30, 2017 including but not limited to, reducing the corporate tax rate from 35% to 21% , requiring a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries that may be electively paid over eight years, and accelerating first year expensing of certain capital expenditures. Shortly after the Tax Act was enacted, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which provides guidance on accounting for the Tax Act’s impact. SAB 118 provided a measurement period, which in no case should extend beyond one year from the Tax Act enactment date, during which a company may complete the accounting for the impacts of the Tax Act under ASC Topic 740. The Company's 2018 income tax provision includes an $11 million reduction to income tax expense due to changes in estimates related to the Tax Act. The reduction is primarily related to a $16 million reduction in the transition tax estimate and $5 million of additional tax associated primarily with the final assessment of changes in our indefinite reinvestment assertion and resulting tax. The Company's 2017 year end income tax provision includes $8 million of net additional income tax expense during the quarter ended December 30, 2017, driven by the reduction in the U.S. corporate tax rate and the transition tax on foreign earnings. Transition tax on foreign earnings: The transition tax is a tax on the previously untaxed accumulated and current earnings and profits of certain of our foreign subsidiaries. In order to determine the amount of the transition tax, the Company must determine, in addition to other factors, the amount of post-1986 earnings and profits (E&P) of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. E&P is similar to retained earnings of the subsidiary, but requires other adjustments to conform to U.S. tax rules. As of December 30, 2017, based on accumulated foreign earnings and profits of approximately $2.6 billion , which are primarily in Europe, the Company was able to make a reasonable estimate of the transition tax and recorded a transition tax obligation of $157 million . In the third quarter of 2018, the Company recorded a $16 million reduction to the transition tax liability and tax expense based on updated estimates of E&P. During the fourth quarter of 2018, the Company, as part of completing its accounting under SAB 118, revised its estimate of the transition tax liability to $94 million , and recorded $47 million of tax reserves related to uncertainty in our interpretation of the statute and associated regulations. Indefinite reinvestment assertion: Prior to the Tax Act, the Company treated a significant portion of its undistributed foreign earnings as indefinitely reinvested. In light of the Tax Act, which included a new territorial tax regime, as of the year ended December 30, 2017, Management determined that the Company would analyze its global capital structure and working capital strategy and considered the indefinite reinvestment assertion to be provisional under SAB 118. In the fourth quarter of 2018, we finished analyzing our global capital structure and working capital strategy and determined that $2.4 billion of foreign earnings as of December 30, 2017 were no longer considered to be indefinitely invested. Accordingly, income tax expense of approximately $5 million was recorded in the fourth quarter of 2018. The Company completed its assessment and accounting under SAB 118 for its indefinite investment assertion. Reduction in U.S. Corporate Tax Rate: The tax provision as of December 30, 2017, included a tax benefit of $149 million for the remeasurement of certain deferred tax assets and liabilities to reflect the corporate income tax rate reduction impact to the Company's net deferred tax balances. The accounting for the reduction in the U.S. Corporate Tax rate was considered complete in the fourth quarter of 2017. The Tax Act also created a new requirement that certain income earned by foreign subsidiaries, known as global intangible low-tax income (GILTI), must be included in the gross income of their U.S. shareholder. During the fourth quarter of 2018, the Company elected to treat the tax effect of GILTI as a current-period expense when incurred. In conjunction with SAB 118, we completed the accounting for the Tax Act in the fourth quarter 2018. As of December 28, 2019, approximately $800 million of unremitted earnings were considered indefinitely reinvested. The unrecognized deferred tax liability for these earnings is estimated at approximately $20 million . However, this estimate could change based on the manner in which the outside basis difference associated with these earnings reverses. Management monitors the Company’s ability to utilize certain future tax deductions, operating losses and tax credit carryforwards, prior to expiration. Changes resulting from management’s assessment will result in impacts to deferred tax assets and the corresponding impacts on the effective income tax rate. Valuation allowances were recorded to reduce deferred tax assets to an amount that will, more likely than not, be realized in the future. The total tax benefit of carryforwards at year-end 2019 and 2018 were $279 million and $270 million , respectively, with related valuation allowances at year-end 2019 and 2018 of $146 million and $166 million , respectively. Of the total carryforwards at year-end 2019 , substantially all will expire after 2024. The following table provides an analysis of the Company’s deferred tax assets and liabilities as of year-end 2019 and 2018 . Deferred tax liabilities decreased in 2019 due primarily to the divestiture of selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cones businesses. Deferred tax assets Deferred tax liabilities (millions) 2019 2018 2019 2018 U.S. state income taxes $ — $ — $ 6 $ 19 Advertising and promotion-related 11 11 — — Wages and payroll taxes 15 20 — — Inventory valuation 17 14 — — Employee benefits 143 132 — — Operating loss, credit and other carryforwards 279 270 — — Hedging transactions 9 10 — — Depreciation and asset disposals — — 217 220 Trademarks and other intangibles — — 526 613 Deferred compensation 19 20 — — Stock options 29 31 — — Other 9 26 — — 531 534 749 852 Less valuation allowance (146 ) (166 ) — — Total deferred taxes $ 385 $ 368 $ 749 $ 852 Net deferred tax asset (liability) $ (364 ) $ (484 ) Classified in balance sheet as: Other assets $ 231 $ 246 Other liabilities (595 ) (730 ) Net deferred tax asset (liability) $ (364 ) $ (484 ) The change in valuation allowance reducing deferred tax assets was: (millions) 2019 2018 2017 Balance at beginning of year $ 166 $ 153 $ 131 Additions charged to income tax expense 25 29 35 Reductions credited to income tax expense (a) (47 ) (1 ) (28 ) Currency translation adjustments 2 (15 ) 15 Balance at end of year $ 146 $ 166 $ 153 (a) During 2019, the Company decreased the valuation allowance by $32 million related to the revaluation of its investment in a foreign subsidiary. Uncertain tax positions The Company is subject to federal income taxes in the U.S. as well as various state, local, and foreign jurisdictions. The Company’s 2019 provision for U.S. federal income taxes represents approximately 70% of the Company’s consolidated income tax provision. The Company was chosen to participate in the Internal Revenue Service (IRS) Compliance Assurance Program (CAP) beginning with the 2008 tax year. As a result, with limited exceptions, the Company is no longer subject to U.S. federal examinations by the IRS for years prior to 2018. The Company is under examination for income and non-income tax filings in various state and foreign jurisdictions. As of December 28, 2019 , the Company has classified $19 million of unrecognized tax benefits as a current tax liability. The Company believes a decrease of $44 million in unrecognized tax benefits during the next twelve months is reasonably possible primarily due to finalization of tax examinations. In addition, t his decrease is expected to be offset by approximately $5 million of projected additions during the next twelve months related primarily to ongoing intercompany transfer pricing activity. Management is currently unaware of any issues under review that could result in significant additional payments, accruals, or other material deviation in this estimate. Following is a reconciliation of the Company’s total gross unrecognized tax benefits as of the years ended December 28, 2019 , December 29, 2018 and December 30, 2017 . For the 2019 year, approximately $81 million represents the amount that, if recognized, would affect the Company’s effective income tax rate in future periods. (millions) 2019 2018 2017 Balance at beginning of year $ 97 $ 60 $ 63 Tax positions related to current year: Additions (a) 5 51 6 Tax positions related to prior years: Additions 4 4 5 Reductions (14 ) (13 ) (8 ) Settlements (1 ) (4 ) (4 ) Lapses in statutes of limitation (1 ) (1 ) (2 ) Balance at end of year $ 90 $ 97 $ 60 (a) During the fourth quarter of 2018, the Company recorded, as part of its final estimate under SAB 118, $47 million of tax reserves related to uncertainty in our interpretation of the statute and associated regulations. During the year ended December 28, 2019, the Company settled certain tax matters resulting in an $11 million net reduction of the tax interest accrual, decreasing the balance to $11 million at year-end. For the year ended December 29, 2018, the Company paid tax-related interest totaling $2 million and recognized $3 million of tax-related interest increasing the accrual balance to $22 million at year-end. For the year ended December 30, 2017, the Company recognized $2 million of tax-related interest resulting in an accrual balance of $21 million

Derivative Instruments and Fair

Derivative Instruments and Fair Value Measurements	12 Months Ended
	Dec. 28, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Fair Value [Text Block]	DERIVATIVE INSTRUMENTS AND FAIR VALUE MEASUREMENTS The Company is exposed to certain market risks such as changes in interest rates, foreign currency exchange rates, and commodity prices, which exist as a part of its ongoing business operations. Management uses derivative financial and commodity instruments, including futures, options, and swaps, where appropriate, to manage these risks. Instruments used as hedges must be effective at reducing the risk associated with the exposure being hedged and must be designated as a hedge at the inception of the contract. The Company designates derivatives as cash flow hedges, fair value hedges, net investment hedges, and uses other contracts to reduce volatility in interest rates, foreign currency and commodities. As a matter of policy, the Company does not engage in trading or speculative hedging transactions. Total notional amounts of the Company’s derivative instruments as of December 28, 2019 and December 29, 2018 were as follows: (millions) 2019 2018 Foreign currency exchange contracts $ 2,628 $ 1,863 Cross-currency contracts 1,540 1,197 Interest rate contracts 1,871 1,608 Commodity contracts 524 417 Total $ 6,563 $ 5,085 Following is a description of each category in the fair value hierarchy and the financial assets and liabilities of the Company that were included in each category at December 28, 2019 and December 29, 2018 , measured on a recurring basis. Level 1 — Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market. For the Company, level 1 financial assets and liabilities consist primarily of commodity derivative contracts. Level 2 — Financial assets and liabilities whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. For the Company, level 2 financial assets and liabilities consist of interest rate swaps and over-the-counter commodity and currency contracts. The Company’s calculation of the fair value of interest rate swaps is derived from a discounted cash flow analysis based on the terms of the contract and the interest rate curve. Over-the-counter commodity derivatives are valued using an income approach based on the commodity index prices less the contract rate multiplied by the notional amount. Foreign currency contracts are valued using an income approach based on forward rates less the contract rate multiplied by the notional amount. Cross-currency contracts are valued based on changes in the spot rate at the time of valuation compared to the spot rate at the time of execution, as well as the change in the interest differential between the two currencies. The Company’s calculation of the fair value of level 2 financial assets and liabilities takes into consideration the risk of nonperformance, including counterparty credit risk. Level 3 — Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability. The Company did not have any level 3 financial assets or liabilities as of December 28, 2019 or December 29, 2018 . The following table presents assets and liabilities that were measured at fair value in the Consolidated Balance Sheet on a recurring basis as of December 28, 2019 and December 29, 2018 : Derivatives designated as hedging instruments 2019 2018 (millions) Level 1 Level 2 Total Level 1 Level 2 Total Assets: Cross currency contracts: Other current assets $ — $ 45 $ 45 $ — $ — $ — Other Assets — 40 40 — 79 79 Interest rate contracts (a): Other current assets — 7 7 — — — Other assets — 4 4 — 17 17 Total assets $ — $ 96 $ 96 $ — $ 96 $ 96 Liabilities: Interest rate contracts (a): Other current liabilities $ — $ (4 ) $ (4 ) $ — $ — $ — Other liabilities — — — — (22 ) (22 ) Total liabilities $ — $ (4 ) $ (4 ) $ — $ (22 ) $ (22 ) (a) The fair value of the related hedged portion of the Company’s long-term debt, a level 2 liability, was $0.7 billion and $1.6 billion as of December 28, 2019 and December 29, 2018 , respectively. Derivatives not designated as hedging instruments 2019 2018 (millions) Level 1 Level 2 Total Level 1 Level 2 Total Assets: Foreign currency exchange contracts: Other current assets $ — $ 12 $ 12 $ — $ 3 $ 3 Commodity contracts: Other current assets 9 — 9 3 — 3 Total assets $ 9 $ 12 $ 21 $ 3 $ 3 $ 6 Liabilities: Foreign currency exchange contracts: Other current liabilities $ — (18 ) $ (18 ) $ — $ (4 ) $ (4 ) Interest rate contracts: Other liabilities — (13 ) (13 ) — — — Commodity contracts: Other current liabilities (1 ) — (1 ) (9 ) — (9 ) Total liabilities $ (1 ) $ (31 ) $ (32 ) $ (9 ) $ (4 ) $ (13 ) The Company has designated a portion of its outstanding foreign currency denominated long-term debt as a net investment hedge of a portion of the Company’s investment in its subsidiaries foreign currency denominated net assets. The carrying value of this debt was $2.6 billion as of December 28, 2019 and December 29, 2018 , respectively. The following amounts were recorded on the Consolidated Balance Sheet related to cumulative basis adjustments for existing fair value hedges as of December 28, 2019 and December 29, 2018 . (millions) Line Item in the Consolidated Balance Sheet in which the hedged item is included Carrying amount of the hedged liabilities Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged liabilities (a) December 28, December 29, December 28, December 29, Interest rate contracts Current maturities of long-term debt $ 493 $ 503 $ — $ 3 Interest rate contracts Long-term debt $ 2,643 $ 3,354 $ 19 $ (18 ) (a) The current maturities of hedged long-term debt includes $3 million of hedging adjustment on discontinued hedging relationships as of December 29, 2018 . The hedged long-term debt includes $15 million and $(12) million of hedging adjustment on discontinued hedging relationships as of December 28, 2019 and December 29, 2018 , respectively. The Company has elected to not offset the fair values of derivative assets and liabilities executed with the same counterparty that are generally subject to enforceable netting agreements. However, if the Company were to offset and record the asset and liability balances of derivatives on a net basis, the amounts presented in the Consolidated Balance Sheet as of December 28, 2019 and December 29, 2018 would be adjusted as detailed in the following table: As of December 28, 2019 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 117 $ (27 ) $ (7 ) $ 83 Total liability derivatives $ (36 ) $ 27 $ — $ (9 ) As of December 29, 2018 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 102 $ (27 ) $ (2 ) $ 73 Total liability derivatives $ (35 ) $ 27 $ — $ (8 ) The effect of derivative instruments on the Consolidated Statement of Income for the years ended December 28, 2019 and December 29, 2018 were as follows: Derivatives and non-derivatives in net investment hedging relationships (millions) Gain (loss) recognized in AOCI Gain (loss) excluded from assessment of hedge effectiveness Location of gain (loss) in income of excluded component 2019 2018 2019 2018 Foreign currency denominated long-term debt $ 60 $ 129 $ — $ — Cross-currency contracts 6 79 34 16 Interest expense Total $ 66 $ 208 $ 34 $ 16 Derivatives not designated as hedging instruments (millions) Location of gain (loss) recognized in income Gain (loss) recognized in income 2019 2018 Foreign currency exchange contracts COGS $ (16 ) $ 19 Foreign currency exchange contracts SGA (2 ) 1 Foreign currency exchange contracts OIE (4 ) — Commodity contracts COGS 4 (23 ) Commodity contracts SGA — — Total $ (18 ) $ (3 ) The effect of fair value and cash flow hedge accounting on the Consolidated Income Statement for the years ended December 28, 2019 and December 29, 2018 : December 28, 2019 December 29, 2018 (millions) Interest Expense Interest Expense Total amounts of income and expense line items presented in the Consolidated Income Statement in which the effects of fair value or cash flow hedges are recorded $ 284 $ 287 Gain (loss) on fair value hedging relationships: Interest contracts: Hedged items (33 ) (5 ) Derivatives designated as hedging instruments 37 9 Gain (loss) on cash flow hedging relationships: Interest contracts: Amount of gain (loss) reclassified from AOCI into income (4 ) (8 ) Foreign exchange contracts: Amount of gain (loss) reclassified from AOCI into income — — During the next 12 months, the Company expects $9 million of net deferred losses reported in accumulated other comprehensive income (AOCI) at December 28, 2019 to be reclassified to income, assuming market rates remain constant through contract maturities. Certain of the Company’s derivative instruments contain provisions requiring the Company to post collateral on those derivative instruments that are in a liability position if the Company’s credit rating falls below BB+ (S&P), or Baa1 (Moody’s). The fair value of all derivative instruments with credit-risk-related contingent features in a liability position on December 28, 2019 was not material. In addition, certain derivative instruments contain provisions that would be triggered in the event the Company defaults on its debt agreements. There were no collateral posting requirements as of December 28, 2019 triggered by credit-risk-related contingent features. Other fair value measurements Fair Value Measurements on a Nonrecurring Basis As part of Project K, the Company has consolidated the usage of and has disposed certain long-lived assets, including manufacturing facilities and Corporate owned assets over the term of the program. See Note 5 for more information regarding Project K. During 2019, there were no long-lived asset impairments related to Project K. During the year ended December 29, 2018 , long-lived assets of $19 million related to a manufacturing facility in the Company's North America reportable segment, were written down to an estimated fair value of $5 million due to Project K activities. The Company's calculation of the fair value of these long-lived assets is based on level 3 inputs, including market comparables, market trends and the condition of the assets. The following is a summary of the carrying and market values of the Company's available for sale securities: 2019 2018 (millions) Cost Unrealized Gain (Loss) Market Value Cost Unrealized Gain/(Loss) Market Value Corporate Bonds $ — $ — $ — $ 59 $ — $ 59 During the year ended December 28, 2019 , the Company's investments in level 2 corporate bonds were sold for $63 million resulting in a gain of $4 million , recorded in Other income and (expense). The market values of the Company's investments in level 2 corporate bonds were based on matrices or models from pricing vendors. Unrealized gains and losses were included in the Consolidated Statement of Comprehensive Income. Additionally, these investments were recorded within Other current assets and Other assets on the Consolidated Balance Sheet, based on the maturity of the individual security. Financial instruments The carrying values of the Company’s short-term items, including cash, cash equivalents, accounts receivable, accounts payable, notes payable and current maturities of long-term debt approximate fair value. The fair value of the Company’s long-term debt, which are level 2 liabilities, is calculated based on broker quotes. The fair value and carrying value of the Company's long-term debt was $7.8 billion and $7.2 billion , respectively, as of December 28, 2019 . Counterparty credit risk concentration The Company is exposed to credit loss in the event of nonperformance by counterparties on derivative financial and commodity contracts. Management believes a concentration of credit risk with respect to derivative counterparties is limited due to the credit ratings and use of master netting and reciprocal collateralization agreements with the counterparties and the use of exchange-traded commodity contracts. Master netting agreements apply in situations where the Company executes multiple contracts with the same counterparty. Certain counterparties represent a concentration of credit risk to the Company. If those counterparties fail to perform according to the terms of derivative contracts, this could result in a loss to the Company of approximately $58 million , net of collateral already received from those counterparties as of December 28, 2019 . For certain derivative contracts, reciprocal collateralization agreements with counterparties call for the posting of collateral in the form of cash, treasury securities or letters of credit if a fair value loss position to the Company or its counterparties exceeds a certain amount. In addition, the company is required to maintain cash margin accounts in connection with its open positions for exchange-traded commodity derivative instruments executed with the counterparty that are subject to enforceable netting agreements. As of December 28, 2019 , the Company had no collateral posting requirements related to reciprocal collateralization agreements and collected approximately $19 million of collateral related to reciprocal collaterization agreements which is reflected as an increase in other liabilities. As of December 28, 2019 , the Company posted $12 million in margin deposits for exchange-traded commodity derivative instruments, which was reflected as an increase in accounts receivable, net. Management believes concentrations of credit risk with respect to accounts receivable is limited due to the generally high credit quality of the Company’s major customers, as well as the large number and geographic dispersion of smaller customers. However, the Company conducts a disproportionate amount of business with a small number of large multinational grocery retailers, with the five largest accounts encompassing approximately 23% of consolidated trade receivables at December 28, 2019 . Refer to Note 1 for disclosures regarding the Company’s accounting policies for derivative instruments.

Contingencies

Contingencies	12 Months Ended
	Dec. 28, 2019
Loss Contingencies [Abstract]
Contingencies Disclosure [Text Block]	CONTINGENCIES The Company is subject to various legal proceedings, claims, and governmental inspections or investigations in the ordinary course of business covering matters such as general commercial, governmental regulations, antitrust and trade regulations, product liability, environmental, intellectual property, workers’ compensation, employment and other actions. These matters are subject to uncertainty and the outcome is not predictable with assurance. The Company uses a combination of insurance and self-insurance for a number of risks, including workers’ compensation, general liability, automobile liability and product liability. In 2016, a class action complaint was filed against Kellogg in the Northern District of California relating to statements made on packaging for certain products. In August 2019, the Court ruled in favor of the plaintiff regarding certain statements made on the Company’s products and ordered the parties to conduct settlement discussions related to all matters in dispute. On October 21, 2019, the plaintiff filed a motion to the Court to approve a settlement. Subsequent to the end of the year, the Court denied without prejudice the plaintiff’s motion to approve the settlement. As of December 28, 2019, the Company concluded that the contingency related to the unfavorable ruling was probable and estimable, resulting in a liability being recorded. This litigation, including any potential settlement, is not expected to have a material impact on the Company’s consolidated financial statements. The Company will continue to evaluate the likelihood of potential outcomes as the litigation continues.

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 28, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	QUARTERLY FINANCIAL DATA (unaudited) Net sales Gross profit (millions) 2019 2018 2019 2018 First $ 3,522 $ 3,401 $ 1,107 $ 1,252 Second 3,461 3,360 1,186 1,209 Third 3,372 3,469 1,000 1,176 Fourth 3,223 3,317 1,088 1,089 $ 13,578 $ 13,547 $ 4,381 $ 4,726 Net income (loss) attributable to Kellogg Company Per share amounts (millions) 2019 2018 2019 2018 Basic Diluted Basic Diluted First $ 282 $ 444 $ 0.82 $ 0.82 $ 1.28 $ 1.27 Second 286 596 0.84 0.84 1.72 1.71 Third 247 380 0.73 0.72 1.10 1.09 Fourth (a) 145 (84 ) 0.43 0.42 (0.24 ) (0.24 ) $ 960 $ 1,336 (a) The significant decrease in the fourth quarter 2018 net income is primarily due to a mark-to-market adjustment recognized on pension assets. The principal market for trading Kellogg shares (Ticker symbol: K) is the New York Stock Exchange (NYSE). At December 28, 2019 there were 31,322 shareholders of record. Dividends paid per share during the last two years were: Quarter 2019 2018 First $ 0.56 $ 0.54 Second 0.56 0.54 Third 0.57 0.56 Fourth 0.57 0.56 $ 2.26 $ 2.20 During 2019 , the Company recorded the following in operating profit and other income (expense): 2019 (millions) First Second Third Fourth Full Year Operating profit Restructuring and cost reduction charges $ (8 ) $ (65 ) $ (18 ) $ (27 ) $ (118 ) Gains / (losses) on mark-to-market adjustments (42 ) 46 (11 ) — (7 ) Other income (expense) Restructuring and cost reduction charges $ — $ — $ — $ 5 $ 5 Gains / (losses) on mark-to-market adjustments 1 (11 ) 32 (120 ) $ (98 ) During 2018 , the Company recorded the following in operating profit and other income (expense): 2018 (millions) First Second Third Fourth Full Year Operating profit Restructuring and cost reduction charges $ (20 ) $ (5 ) $ (64 ) $ (84 ) $ (173 ) Gains / (losses) on mark-to-market adjustments 30 3 (11 ) (15 ) 7 Other income (expense) Restructuring and cost reduction charges $ — $ — $ 30 $ — $ 30 Gains / (losses) on mark-to-market adjustments 9 2 36 (397 ) $ (350 )

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 28, 2019
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	REPORTABLE SEGMENTS Kellogg Company is the world’s leading producer of cereal, second largest producer of crackers and a leading producer of savory snacks and frozen foods. Additional product offerings include toaster pastries, cereal bars, veggie foods, and noodles. Kellogg products are manufactured and marketed globally. Principal markets for these products include the United States, United Kingdom and Nigeria. On December 30, 2018 the Company reorganized its North American business. The reorganization eliminated the legacy business unit structure and internal reporting. In addition, the Company changed the internal reporting provided to the chief operating decision maker (CODM) and segment manager. As a result, the Company reevaluated its operating segments. Prior period segment results were restated to reflect the new organizational structure. In conjunction with the reorganization, certain global research and development resources and related activities were transferred from the North America business to Corporate. Prior period segment results were not restated for the transfer as the impacts were not considered material. In addition, the Company transferred its Middle East, North Africa, and Turkey businesses from Kellogg Europe to Kellogg AMEA, effective December 30, 2018. This consolidated the Company's Africa business under a single regional management team. All comparable prior periods have been restated to reflect the change. For the year ended December 29, 2018, the change resulted in $273 million of reported net sales, and $46 million of reported operating profit transferring from Kellogg Europe to Kellogg AMEA. For the year ended December 30, 2017, the change resulted in $241 million of reported net sales, and $56 million of reported operating profit transferring from Kellogg Europe to Kellogg AMEA. The Company manages its operations through four operating segments that are based on geographic location - North America which includes U.S. businesses and Canada; Europe which consists principally of European countries; Latin America which consists of Central and South America and includes Mexico; and AMEA (Asia Middle East Africa) which consists of Africa, Middle East, Australia and other Asian and Pacific markets. These operating segments also represent our reportable segments. On July 28, 2019, the Company completed its sale of selected cookies, fruit and fruit flavored snacks, pie crusts, and ice cream cone businesses to Ferrero for approximately $1.3 billion in cash. Both the total assets and the net assets, consisting primarily of goodwill and intangibles, property, plant and equipment, and inventory, of the businesses were approximately $1.3 billion . The operating results for these businesses were primarily included in the North America reporting segment prior to the sale. The measurement of reportable segment results is based on segment operating profit which is generally consistent with the presentation of operating profit in the Consolidated Statement of Income. Reportable segment results were as follows: (millions) 2019 2018 2017 Net sales North America 8,390 8,688 8,673 Europe 2,092 2,122 2,050 Latin America 940 947 944 AMEA 2,156 1,790 1,187 Consolidated $ 13,578 $ 13,547 $ 12,854 Operating profit North America (a)(b) 1,215 1,397 1,246 Europe 222 251 220 Latin America 85 102 108 AMEA 195 174 140 Total Reportable Segments 1,717 1,924 1,714 Corporate (b) (316 ) (218 ) (327 ) Consolidated $ 1,401 $ 1,706 $ 1,387 Depreciation and amortization (c) North America 291 341 330 Europe 80 78 78 Latin America 30 37 37 AMEA 76 57 35 Total Reportable Segments 477 513 480 Corporate 7 3 1 Consolidated $ 484 $ 516 $ 481 (a) During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million . (b) Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million , respectively. (c) Includes asset impairment charges as discussed in Note 14 . Certain items such as interest expense and income taxes, while not included in the measure of reportable segment operating results, are regularly reviewed by the CODM for the Company’s internationally-based reportable segments as shown below. (millions) 2019 2018 2017 Interest expense North America $ — $ 1 $ 3 Europe 6 6 14 Latin America 9 3 2 AMEA 14 9 4 Corporate 255 268 233 Consolidated $ 284 $ 287 $ 256 Income taxes Europe $ 48 $ 23 $ (37 ) Latin America 16 30 33 AMEA 23 23 10 Corporate & North America 234 105 404 Consolidated $ 321 $ 181 $ 410 Assets are reviewed by the CODM on a consolidated basis and therefore are no presented by operating segmen t . The CODM does review additions to long-lived assets based on operating segment. (millions) 2019 2018 2017 Additions to long-lived assets North America $ 356 $ 336 $ 329 Europe 83 84 102 Latin America 41 76 32 AMEA 101 79 34 Corporate 5 3 4 Consolidated $ 586 $ 578 $ 501 The Company’s largest customer, Wal-Mart Stores, Inc. and its affiliates, accounted for approximately 19% of consolidated net sales during both 2019 and 2018 , and 20% in 2017, comprised principally of sales within the United States. Supplemental geographic information is provided below for net sales to external customers and long-lived assets: (millions) 2019 2018 2017 Net sales United States $ 7,885 $ 8,176 $ 8,160 All other countries 5,693 5,371 4,694 Consolidated $ 13,578 $ 13,547 $ 12,854 Long-lived assets United States $ 1,996 $ 2,197 $ 2,195 All other countries 1,616 1,534 1,521 Consolidated $ 3,612 $ 3,731 $ 3,716 Supplemental product information is provided below for net sales to external customers: (millions) 2019 2018 2017 Snacks $ 6,663 $ 6,797 $ 6,683 Cereal 5,029 5,203 5,222 Frozen 1,037 1,020 949 Noodles and other 849 527 — Consolidated $ 13,578 $ 13,547 $ 12,854

Supplemental Financial Statemen

Supplemental Financial Statement Data	12 Months Ended
	Dec. 28, 2019
Supplemental Financial Statement Data [Abstract]
Supplemental Financial Statement Data [Text Block]	SUPPLEMENTAL FINANCIAL STATEMENT DATA Consolidated Statement of Income (millions) 2019 2018 2017 Research and development expense $ 144 $ 154 $ 148 Advertising expense $ 676 $ 752 $ 732 Consolidated Balance Sheet (millions) 2019 2018 Trade receivables $ 1,315 $ 1,163 Allowance for doubtful accounts (10 ) (10 ) Refundable income taxes 56 28 Other receivables 215 194 Accounts receivable, net $ 1,576 $ 1,375 Raw materials, spare parts, and supplies $ 303 $ 339 Finished goods and materials in process 923 991 Inventories $ 1,226 $ 1,330 Land $ 116 $ 120 Buildings 2,021 2,061 Machinery and equipment 5,852 5,971 Capitalized software 496 438 Construction in progress 566 583 Accumulated depreciation (5,439 ) (5,442 ) Property, net $ 3,612 $ 3,731 Other intangibles $ 2,677 $ 3,448 Accumulated amortization (101 ) (87 ) Other intangibles, net $ 2,576 $ 3,361 Pension $ 241 $ 228 Deferred income taxes 231 246 Other 667 594 Other assets $ 1,139 $ 1,068 Accrued income taxes $ 42 $ 48 Accrued salaries and wages 290 309 Accrued advertising and promotion 641 557 Other 577 502 Other current liabilities $ 1,550 $ 1,416 Income taxes payable $ 81 $ 115 Nonpension postretirement benefits 33 34 Other 429 355 Other liabilities $ 543 $ 504 Allowance for doubtful accounts (millions) 2019 2018 2017 Balance at beginning of year $ 10 $ 10 $ 8 Additions charged to expense 9 4 14 Doubtful accounts charged to reserve (9 ) (4 ) (12 ) Balance at end of year $ 10 $ 10 $ 10

Accounting Policies (Policies)

Accounting Policies (Policies)	12 Months Ended
	Dec. 28, 2019
Accounting Policies [Abstract]
Basis of accounting [Policy Text Block]	The consolidated financial statements include the accounts of the Kellogg Company, those of the subsidiaries that it controls due to ownership of a majority voting interest (Kellogg or the Company). The Company continually evaluates its involvement with variable interest entities (VIEs) to determine whether it has variable interests and is the primary beneficiary of the VIE. When these criteria are met, the Company is required to consolidate the VIE. The Company’s share of earnings or losses of nonconsolidated affiliates is included in its consolidated operating results using the equity method of accounting when it is able to exercise significant influence over the operating and financial decisions of the affiliate. The Company uses the cost method of accounting if it is not able to exercise significant influence over the operating and financial decisions of the affiliate. Intercompany balances and transactions are eliminated. The Company’s fiscal year normally ends on the Saturday closest to December 31 and as a result, a 53rd week is added approximately every sixth year. The Company’s 2019, 2018 and 2017 fiscal years each contained 52 weeks and ended on December 28, 2019 , December 29, 2018 , and December 30, 2017, respectively.
Use of estimates [Policy Text Block]	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods reported. Actual results could differ from those estimates.
Cash and cash equivalents [Policy Text Block]	Highly liquid investments with remaining stated maturities of three months or less when purchased are considered cash equivalents and recorded at cost.
Accounts receivables [Policy Text Block]	Accounts receivable consists principally of trade receivables, which are recorded at the invoiced amount, net of allowances for doubtful accounts and prompt payment discounts. Trade receivables do not bear interest. The allowance for doubtful accounts represents management’s estimate of the amount of probable credit losses in existing accounts receivable, as determined from a review of past due balances and other specific account data. Account balances are written off against the allowance when management determines the receivable is uncollectible. For the years ended 2019 and 2018 the Company did not have off-balance sheet credit exposure related to its customers. Please refer to Note 2 for information on sales of accounts receivable.
Inventories [Policy Text Block]	Inventories are valued at the lower of cost or net realizable value. Cost is determined on an average cost basis.
Property [Policy Text Block]	The Company’s property consists mainly of plants and equipment used for manufacturing activities. These assets are recorded at cost and depreciated over estimated useful lives using straight-line methods for financial reporting and accelerated methods, where permitted, for tax reporting. Major property categories are depreciated over various periods as follows (in years): manufacturing machinery and equipment 15 - 30 ; office equipment 5 ; computer equipment and capitalized software 3 - 7 ; building components 20 ; building structures 10 - 50 . Cost includes interest associated with significant capital projects. Plant and equipment are reviewed for impairment when conditions indicate that the carrying value may not be recoverable. Such conditions include an extended period of idleness or a plan of disposal. Assets to be disposed of at a future date are depreciated over the remaining period of use. Assets to be sold are written down to realizable value at the time the assets are being actively marketed for sale and a sale is expected to occur within one year. There were no assets held for sale at the year-end 2019 or 2018.
Goodwill and other intangible assets [Policy Text Block]	Goodwill and indefinite-lived intangibles are not amortized, but are tested at least annually for impairment of value and whenever events or changes in circumstances indicate the carrying amount of the asset may be impaired. An intangible asset with a finite life is amortized on a straight-line basis over the estimated useful life, which materially approximates the pattern of economic benefit. For the goodwill impairment test, the fair value of the reporting units are estimated based on market multiples. This approach employs market multiples based on either sales or earnings before interest, taxes, depreciation and amortization for companies that are comparable to the Company’s reporting units. In the event the fair value determined using the market multiple approach is close to carrying value, the Company may supplement the fair value determination using discounted cash flows. The assumptions used for the impairment test are consistent with those utilized by a market participant performing similar valuations for the Company’s reporting units. Similarly, impairment testing of other intangible assets requires a comparison of carrying value to fair value of that particular asset. Fair values of non-goodwill intangible assets are based primarily on projections of future cash flows to be generated from that asset. For instance, cash flows related to a particular trademark would be based on a projected royalty stream attributable to branded product sales, discounted at rates consistent with rates used by market participants.
Accounts payable [Policy Text Block]	The Company has agreements with third parties to provide accounts payable tracking systems which facilitate participating suppliers’ ability to monitor and, if elected, sell payment obligations from the Company to designated third-party financial institutions. Participating suppliers may, at their sole discretion, make offers to sell one or more payment obligations of the Company prior to their scheduled due dates at a discounted price to participating financial institutions. The Company’s goal is to capture overall supplier savings, in the form of payment terms or vendor funding, and the agreements facilitate the suppliers’ ability to sell payment obligations, while providing them with greater working capital flexibility. The Company has no economic interest in the sale of these suppliers’ receivables and no direct financial relationship with the financial institutions concerning these services. The Company’s obligations to its suppliers, including amounts due and scheduled payment dates, are not impacted by suppliers’ decisions to sell amounts under the arrangements. However, the Company’s right to offset balances due from suppliers against payment obligations is restricted by the agreements for those payment obligations that have been sold by suppliers. The payment of these obligations by the Company is included in cash used in operating activities in the Consolidated Statement of Cash Flows. As of December 28, 2019 , $812 million of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system, and participating suppliers had sold $605 million of those payment obligations to participating financial institutions. As of December 29, 2018 , $893 million of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system, and participating suppliers had sold $701 million
Revenue recognition [Policy Text Block]	The Company recognizes sales upon delivery of its products to customers. Revenue, which includes shipping and handling charges billed to the customer, is reported net of applicable discounts, returns, allowances, and various government withholding taxes. Methodologies for determining these provisions are dependent on local customer pricing and promotional practices, which range from contractually fixed percentage price reductions to reimbursement based on actual occurrence or performance. Where applicable, future reimbursements are estimated based on a combination of historical patterns and future expectations regarding specific in-market product performance. The Company recognizes revenue from the sale of food products which are sold to retailers through direct sales forces, broker and distributor arrangements. The Company also recognizes revenue from the license of our trademarks granted to third parties who uses these trademarks on their merchandise and revenue from hauling services provided to third parties within certain markets. Revenue from these licenses and hauling services is not material to the Company. Contract balances recognized in the current period that are not the result of current period performance are not material to the Company. The Company also does not incur costs to obtain or fulfill contracts. The Company does not adjust the promised amount of consideration for the effects of significant financing components as the Company expects, at contract inception, that the period between the transfer of a promised good or service to a customer and when the customer pays for that good or service will be one year or less. The Company accounts for shipping and handling activities that occur before the customer has obtained control of a good as fulfillment activities (i.e., an expense) rather than as a promised service. The Company excludes from the measurement of transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the Company from a customer for sales taxes. Performance obligations The Company recognizes revenue when (or as) performance obligations are satisfied by transferring control of the goods to customers. Control is transferred upon delivery of the goods to the customer. The customer is invoiced with payment terms which are commensurate with the customer’s credit profile. Shipping and/or handling costs that occur before the customer obtains control of the goods are deemed to be fulfillment activities and are accounted for as fulfillment costs. The Company assesses the goods and services promised in its customers’ purchase orders and identifies a performance obligation for each promise to transfer a good or service (or bundle of goods or services) that is distinct. To identify the performance obligations, the Company considers all the goods or services promised, whether explicitly stated or implied based on customary business practices. For a purchase order that has more than one performance obligation, the Company allocates the total consideration to each distinct performance obligation on a relative standalone selling price basis. Significant Judgments The Company offers various forms of trade promotions and the methodologies for determining these provisions are dependent on local customer pricing and promotional practices, which range from contractually fixed percentage price reductions to provisions based on actual occurrence or performance. Where applicable, future provisions are estimated based on a combination of historical patterns and future expectations regarding specific in-market product performance. The Company's promotional activities are conducted either through the retail trade or directly with consumers and include activities such as in-store displays and events, feature price discounts, consumer coupons, contests and loyalty programs. The costs of these activities are generally recognized at the time the related revenue is recorded, which normally precedes the actual cash expenditure. The recognition of these costs therefore requires management judgment regarding the volume of promotional offers that will be redeemed by either the retail trade or consumer. These estimates are made using various techniques including historical data on performance of similar promotional programs. Differences between estimated expense and actual redemptions are normally immaterial and recognized as a change in management estimate in a subsequent period.
Advertising and promotion [Policy Text Block]	The Company expenses production costs of advertising the first time the advertising takes place. Advertising expense is classified in selling, general and administrative (SGA) expense. The Company classifies promotional payments to its customers, the cost of consumer coupons, and other cash redemption offers in net sales. Promotional allowances are estimated using various techniques including historical cash expenditure and redemption experience and patterns. Differences between estimated expense and actual redemptions are normally immaterial and recognized as a change in management estimate in a subsequent period. The liability associated with these promotions are recorded in other current liabilities.
Research and development [Policy Text Block]	The costs of research and development (R&D) are expensed as incurred and are classified in SGA expense. R&D includes expenditures for new product and process innovation, as well as significant technological improvements to existing products and processes. The Company’s R&D expenditures primarily consist of internal salaries, wages, consulting, and supplies attributable to time spent on R&D activities. Other costs include depreciation and maintenance of research facilities and equipment, including assets at manufacturing locations that are temporarily engaged in pilot plant activities.
Share-based compensation [Policy Text Block]	The Company uses stock-based compensation, including stock options, restricted stock, restricted stock units, and executive performance shares, to provide long-term performance incentives for its global workforce. The Company classifies pre-tax stock compensation expense in SGA and COGS within its corporate operations. Expense attributable to awards of equity instruments is recorded in capital in excess of par value in the Consolidated Balance Sheet. Certain of the Company’s stock-based compensation plans contain provisions that prorate vesting of awards upon retirement, disability, or death of eligible employees and directors. A stock-based award is considered vested for expense attribution purposes when the employee’s retention of the award is no longer contingent on providing subsequent service. Accordingly, the Company recognizes compensation cost immediately for awards granted to retirement-eligible individuals or over the period from the grant date to the date retirement eligibility is achieved, if less than the stated vesting period. The Company recognizes compensation cost for stock option awards that have a graded vesting schedule on a straight-line basis over the requisite service period for the entire award.
Income taxes [Policy Text Block]	The Company recognizes uncertain tax positions based on a benefit recognition model. Provided that the tax position is deemed more likely than not of being sustained, the Company recognizes the largest amount of tax benefit that is greater than 50 percent likely of being ultimately realized upon settlement. The tax position is derecognized when it is no longer more likely than not of being sustained. The Company classifies income tax-related interest and penalties as interest expense and SGA expense, respectively, on the Consolidated Statement of Income. The current portion of the Company’s unrecognized tax benefits is presented in the Consolidated Balance Sheet in other current assets and other current liabilities, and the amounts expected to be settled after one year are recorded in other assets and other liabilities. Management monitors the Company’s ability to utilize certain future tax deductions, operating losses and tax credit carryforwards, prior to expiration as well as the reinvestment assertion regarding our undistributed foreign earnings. Changes resulting from management’s assessment will result in impacts to deferred tax assets and the corresponding impacts on the effective income tax rate. Valuation allowances were recorded to reduce deferred tax assets to an amount that will, more likely than not, be realized in the future. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act includes a provision designed to tax currently global intangible low taxed income (GILTI) starting in 2018. Under the provision, a U.S. shareholder is required to include in gross income the amount of its GILTI, which is 50% of the excess of the shareholder’s net tested income of its controlled foreign corporation over the deemed tangible income return. The amount of GILTI included by a U.S. shareholder is computed by aggregating all controlled foreign corporations (CFC). Shareholders are allowed to claim a foreign tax credit for 80 percent of the taxes paid or accrued with respect to the tested income of each CFC, subject to some limitations. The Company elected to account for the GILTI as a period cost and has included an estimate for GILTI in its effective tax rate.
Derivatives instruments[Policy Text Block]	The fair value of derivative instruments is recorded in other current assets, other assets, other current liabilities or other liabilities. Gains and losses representing either hedge ineffectiveness, hedge components excluded from the assessment of effectiveness, or hedges of translational exposure are recorded in the Consolidated Statement of Income in other income (expense), net (OIE) or interest expense. In the Consolidated Statement of Cash Flows, settlements of cash flow and fair value hedges are classified as an operating activity; settlements of all other derivative instruments, including instruments for which hedge accounting has been discontinued, are classified consistent with the nature of the instrument. Cash flow hedges. Qualifying derivatives are accounted for as cash flow hedges when the hedged item is a forecasted transaction. Gains and losses on these instruments are recorded in other comprehensive income until the underlying transaction is recorded in earnings. When the hedged item is realized, gains or losses are reclassified from accumulated other comprehensive income (loss) (AOCI) to the Consolidated Statement of Income on the same line item as the underlying transaction. Fair value hedges. Qualifying derivatives are accounted for as fair value hedges when the hedged item is a recognized asset, liability, or firm commitment. Gains and losses on these instruments are recorded in earnings, offsetting gains and losses on the hedged item. Net investment hedges. Qualifying derivative and nonderivative financial instruments are accounted for as net investment hedges when the hedged item is a nonfunctional currency investment in a subsidiary. Gains and losses on these instruments are included in foreign currency translation adjustments in AOCI. Derivatives not designated for hedge accounting. Gains and losses on these instruments are recorded in the Consolidated Statement of Income, on the same line item as the underlying hedged item. Foreign currency exchange risk. The Company is exposed to fluctuations in foreign currency cash flows related primarily to third-party purchases, intercompany transactions and when applicable, nonfunctional currency denominated third-party debt. The Company is also exposed to fluctuations in the value of foreign currency investments in subsidiaries and cash flows related to repatriation of these investments. Additionally, the Company is exposed to volatility in the translation of foreign currency denominated earnings to U.S. dollars. Management assesses foreign currency risk based on transactional cash flows and translational volatility and may enter into forward contracts, options, and currency swaps to reduce fluctuations in long or short currency positions. Forward contracts and options are generally less than 18 months duration. Currency swap agreements are established in conjunction with the term of underlying debt issues. For foreign currency cash flow and fair value hedges, the assessment of effectiveness is generally based on changes in spot rates. Changes in time value are reported in OIE. Interest rate risk. The Company is exposed to interest rate volatility with regard to future issuances of fixed rate debt and existing and future issuances of variable rate debt. The Company periodically uses interest rate swaps, including forward-starting swaps, to reduce interest rate volatility and funding costs associated with certain debt issues, and to achieve a desired proportion of variable versus fixed rate debt, based on current and projected market conditions. Fixed-to-variable interest rate swaps are accounted for as fair value hedges and the assessment of effectiveness is based on changes in the fair value of the underlying debt, using incremental borrowing rates currently available on loans with similar terms and maturities. Price risk. The Company is exposed to price fluctuations primarily as a result of anticipated purchases of raw and packaging materials, fuel, and energy. The Company has historically used the combination of long-term contracts with suppliers, and exchange-traded futures and option contracts to reduce price fluctuations in a desired percentage of forecasted raw material purchases over a duration of generally less than 18 months.
Pension benefits, nonpension postretirement and postemployment benefits [Policy Text Block]	The Company sponsors a number of U.S. and foreign plans to provide pension, health care, and other welfare benefits to retired employees, as well as salary continuance, severance, and long-term disability to former or inactive employees. The recognition of benefit expense is based on actuarial assumptions, such as discount rate, long-term rate of compensation increase, and long-term rate of return on plan assets and health care cost trend rate. Service cost is reported in COGS and SGA expense on the Consolidated Statement of Income. All other components of net periodic pension cost are included in OIE. Postemployment benefits. The Company recognizes an obligation for postemployment benefit plans that vest or accumulate with service. Obligations associated with the Company’s postemployment benefit plans, which are unfunded, are included in other current liabilities and other liabilities on the Consolidated Balance Sheet. All gains and losses are recognized over the average remaining service period of active plan participants. Postemployment benefits that do not vest or accumulate with service or benefits to employees in excess of those specified in the respective plans are expensed as incurred. Pension and nonpension postretirement benefits. The Company recognizes actuarial gains and losses in operating results in the year in which they occur. Experience gains and losses are recognized annually as of the measurement date, which is the Company’s fiscal year-end, or when remeasurement is otherwise required under generally accepted accounting principles. The Company uses the fair value of plan assets to calculate the expected return on plan assets. Reportable segments are allocated service cost. All other components of pension and postretirement benefit expense, including interest cost, expected return on assets, prior service cost, and experience gains and losses are considered unallocated corporate costs and are not included in the measure of reportable segment operating results. See Note 17 for more information on reportable segments. Management reviews the Company’s expected long-term rates of return annually; however, the benefit trust investment performance for one particular year does not, by itself, significantly influence this evaluation. The expected rates of return are generally not revised provided these rates fall between the 25th and 75th percentile of expected long-term returns, as determined by the Company’s modeling process. For defined benefit pension and postretirement plans, the Company records the net overfunded or underfunded position as a pension asset or pension liability on the Consolidated Balance Sheet.
New Accounting Pronouncements, Policy [Policy Text Block]	New accounting standards Income Taxes. In October 2016, the Financial Accounting Standards Board (FASB), as part of their simplification initiative, issued an Accounting Standards Update (ASU) to improve the accounting for income tax consequences of intra-entity transfers of assets other than inventory. The amendments in the ASU eliminate the exception, such that entities should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the period of adoption. The Company early adopted the ASU in the first quarter of 2017. As a result of intercompany transfers of intellectual property, the Company recorded a $39 million reduction in income tax expense during the year ended December 30, 2017. Upon adoption, there was no cumulative effect adjustment to retained earnings. Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities. In August 2017, the FASB issued an ASU intended to simplify hedge accounting by better aligning an entity’s financial reporting for hedging relationships with its risk management activities. The ASU also simplifies the application of the hedge accounting guidance. The new guidance is effective fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. For cash flow hedges existing at the adoption date, the standard requires adoption on a modified retrospective basis with a cumulative-effect adjustment to the Consolidated Balance Sheet as of the beginning of the year of adoption. The amendments to presentation guidance and disclosure requirements are required to be adopted prospectively. The Company adopted the ASU in the first quarter of 2018. The impact of adoption was immaterial to the financial statements. Simplifying the test for goodwill impairment. In January 2017, the FASB issued an ASU to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The ASU is effective for an entity's annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The amendments in this ASU should be applied on a prospective basis. The Company adopted the ASU in the first quarter of 2018 with no impact. Recognition and measurement of financial assets and liabilities. In January 2016, the FASB issued an ASU which requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income and which updates certain presentation and disclosure requirements. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. Early adoption can be elected for all financial statements of fiscal years and interim periods that have not yet been issued or that have not yet been made available for issuance. Entities should apply the update by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The Company adopted the updated standard in the first quarter of 2018. The impact of adoption was immaterial to the financial statements. Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. In February 2018, the Financial Accounting Standards Board (FASB) issued an Accounting Standard Update (ASU) permitting a company to reclassify the disproportionate income tax effects of the Tax Cuts and Jobs Act of 2017 on items within accumulated other comprehensive income (AOCI) to retained earnings. We elected to adopt the ASU effective in the first quarter of 2019 and reclassified the disproportionate income tax effect recorded within AOCI to retained earnings. This resulted in a decrease to AOCI and an increase to retained earnings of $22 million . The adjustment primarily related to deferred taxes previously recorded for pension and other postretirement benefits, as well as hedging positions for debt and net investment hedges. Leases. In February 2016, the FASB issued an ASU which requires the recognition of lease assets and lease liabilities by lessees for all leases with terms greater than 12 months. The distinction between finance leases and operating leases remains, with similar classification criteria as current GAAP to distinguish between capital and operating leases. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases are recognized on the Consolidated Balance Sheet. Lessor accounting remains substantially similar to previous GAAP. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company adopted the ASU in the first quarter of 2019, using the optional transition method that allows for a cumulative-effect adjustment in the period of adoption with no restatement of prior periods. The Company elected the package of practical expedients permitted under the transition guidance that allows for the carry forward of historical lease classifications and consistent treatment of initial direct costs for existing leases. The Company also elected to apply the practical expedient that allows the continued historical treatment of land easements. The Company did not elect the practical expedient for the use of hindsight in evaluating the expected lease term of existing leases. The adoption of the ASU resulted in the recording of operating lease assets and operating lease liabilities of approximately $453 million to $461 million respectively, as of December 30, 2018. The difference between the additional lease assets and lease liabilities, represents existing deferred rent and prepaid lease balances that were reclassified on the balance sheet. The adoption of the ASU did not have a material impact to the Company’s Consolidated Statements of Income or Cash Flows. Accounting standards to be adopted in future periods Cloud Computing Arrangements. In August 2018, the FASB issued ASU 2018-15: Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The ASU allows companies to capitalize implementation costs incurred in a hosting arrangement that is a service contract over the term of the hosting arrangement, including periods covered by renewal options that are reasonably certain to be exercised. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019 and can be applied retrospectively or prospectively. Early adoption is permitted. The Company plans to adopt the ASU in the first quarter of 2020 and apply it prospectively. The adoption is not expected to have a material impact to the Company's Consolidated Financial Statements. Compensation Retirement Benefits. In August 2018, the FASB issued ASU 2018-14: Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. The ASU removed disclosures that no longer are considered cost beneficial, clarified the specific requirements of disclosures, and added disclosure requirements identified as relevant. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2020 and can be applied retrospectively or prospectively. Early adoption is permitted. The Company is currently assessing when to adopt the ASU and the impact of adoption.

Divestiures, West Africa Inve_2

Divestiures, West Africa Investments and Acquisitions (Tables)	12 Months Ended
	Dec. 28, 2019
Business Combinations [Abstract]
Schedule of business acquisitions, by acquisition	The assets and liabilities are included in the Consolidated Balance Sheet as of December 28, 2019 within the North America reporting segment. The acquired assets and assumed liabilities include the following: (millions) October 27, 2017 Current assets $ 42 Goodwill 373 Intangible assets, primarily indefinite-lived brands 203 Current liabilities (23 ) $ 595 The assets and liabilities are included in the Consolidated Balance Sheet as of December 29, 2018 within the Kellogg AMEA reporting segment. The fair value of the acquired assets, assumed liabilities, and noncontrolling interest include the following: (millions) May 2, 2018 Current assets $ 118 Property 41 Goodwill 616 Intangible assets subject to amortization, primarily customer relationships 425 Intangible assets not subject to amortization, primarily distribution rights 373 Deferred tax liability (254 ) Other liabilities (150 ) Noncontrolling interest (552 ) $ 617
Business acquisition, pro forma information	The Company's consolidated unaudited pro forma historical net sales and net income, as if Multipro had been acquired at the beginning of 2017, exclusive of the non-cash $245 million gain on the disposition of the equity interest recognized in the second quarter of 2018, are estimated as follows: Year ended (millions) December 29, 2018 December 30, 2017 Net sales $ 13,829 $ 13,511 Net Income attributable to Kellogg Company $ 1,336 $ 1,255

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Changes in the carrying amount of goodwill, intangible assets subject to amortization, consisting primarily of customer relationships, and indefinite-lived intangible assets, consisting of brands and distribution agreements, are presented in the following tables: Carrying amount of goodwill (millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 4,617 $ 368 $ 244 $ 275 $ 5,504 Additions — — — 616 616 Purchase price allocation adjustment (2 ) — — — (2 ) Purchase price adjustment — — — — — Currency translation adjustment (4 ) (22 ) (26 ) (16 ) (68 ) December 29, 2018 $ 4,611 $ 346 $ 218 $ 875 $ 6,050 Divestiture (191 ) — — — (191 ) Currency translation adjustment 2 1 (5 ) 4 2 December 28, 2019 $ 4,422 $ 347 $ 213 $ 879 $ 5,861
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Gross carrying amount (millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 72 $ 45 $ 74 $ 10 $ 201 Additions — — — 425 425 Purchase price allocation adjustment 2 — — — 2 Currency translation adjustment — (2 ) (11 ) (7 ) (20 ) December 29, 2018 $ 74 $ 43 $ 63 $ 428 $ 608 Additions 2 — — — 2 Divestiture (12 ) — — — (12 ) Currency translation adjustment — (2 ) (3 ) 1 (4 ) December 28, 2019 $ 64 $ 41 $ 60 $ 429 $ 594 Accumulated Amortization December 30, 2017 $ 35 $ 18 $ 10 $ 4 $ 67 Amortization 4 3 4 12 23 Currency translation adjustment — (1 ) (2 ) — (3 ) December 29, 2018 $ 39 $ 20 $ 12 $ 16 $ 87 Amortization (a) 4 2 3 18 27 Divestiture (12 ) — — — (12 ) Currency translation adjustment — (1 ) — — (1 ) December 28, 2019 $ 31 $ 21 $ 15 $ 34 $ 101 Intangible assets subject to amortization, net December 30, 2017 $ 37 $ 27 $ 64 $ 6 $ 134 Additions — — — 425 425 Amortization (4 ) (3 ) (4 ) (12 ) (23 ) Purchase price allocation adjustment 2 — — — 2 Currency translation adjustment — (1 ) (9 ) (7 ) (17 ) December 29, 2018 $ 35 $ 23 $ 51 $ 412 $ 521 Additions 2 — — — 2 Amortization (4 ) (2 ) (3 ) (18 ) (27 ) Divestiture — — — — — Currency translation adjustment — (1 ) (3 ) 1 (3 ) December 28, 2019 $ 33 $ 20 $ 45 $ 395 $ 493 (a) The currently estimated aggregate amortization expense for each of the next five succeeding fiscal periods is approximately $28 million per year through 2024.
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]	(millions) North America Europe Latin America AMEA Consoli- dated December 30, 2017 $ 1,985 $ 420 $ 86 $ 14 $ 2,505 Additions — — — 373 373 Purchase price allocation adjustment — — — — — Currency translation adjustment — (19 ) (13 ) (6 ) (38 ) December 29, 2018 $ 1,985 $ 401 $ 73 $ 381 $ 2,840 Additions 18 — — — 18 Divestiture (765 ) — — — (765 ) Currency translation adjustment — (9 ) (3 ) 2 (10 ) December 28, 2019 $ 1,238 $ 392 $ 70 $ 383 $ 2,083

Restructuring and Cost Reduct_2

Restructuring and Cost Reduction Activities (Tables)	12 Months Ended
	Dec. 28, 2019
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring and Cost Reduction Activities	Program costs to date (millions) 2019 2018 2017 December 28, 2019 Employee related costs $ 49 $ 63 $ 177 $ 646 Pension curtailment (gain) loss, net (5 ) (30 ) (148 ) (172 ) Asset related costs 21 16 77 306 Asset impairment — 14 — 169 Other costs 48 80 157 684 Total $ 113 $ 143 $ 263 $ 1,633 Program costs to date (millions) 2019 2018 2017 December 28, 2019 North America $ 50 $ 107 $ 345 $ 1,072 Europe 47 3 40 380 Latin America 15 15 9 57 AMEA 3 11 11 101 Corporate (2 ) 7 (142 ) 23 Total $ 113 $ 143 $ 263 $ 1,633
Schedule of Exit Cost Reserves	(millions) Employee Related Costs Curtailment Gain Loss, net Asset Impairment Asset Related Costs Other Costs Total Liability as of December 30, 2017 $ 97 $ — $ — $ — $ 63 $ 160 2018 restructuring charges 63 (30 ) 14 16 80 143 Cash payments (67 ) — — (9 ) (133 ) (209 ) Non-cash charges and other — 30 (14 ) (6 ) — 10 Liability as of December 29, 2018 $ 93 $ — $ — $ 1 $ 10 $ 104 2019 restructuring charges 49 (5 ) — 21 48 113 Cash payments (81 ) — — (10 ) (57 ) (148 ) Non-cash charges and other — 5 — (12 ) — (7 ) Liability as of December 28, 2019 $ 61 $ — $ — $ — $ 1 $ 62

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 28, 2019
Equity [Abstract]
Changes in Comprehensive Income	2019 2018 2017 Pre-tax Tax (expense) After-tax Pre-tax Tax (expense) After-tax Pre-tax Tax (expense) After-tax amount benefit amount amount benefit amount amount benefit amount Net income $ 977 $ 1,344 $ 1,254 Other comprehensive income: Foreign currency translation adjustments $ 100 $ (19 ) 81 $ 5 $ (53 ) $ (48 ) $ (34 ) 113 79 Cash flow hedges: Unrealized gain (loss) on cash flow hedges 5 (1 ) 4 3 (1 ) 2 — — — Reclassification to net income 4 (1 ) 3 8 (2 ) 6 9 (3 ) 6 Postretirement and postemployment benefits: Amounts arising during the period: Net experience gain (loss) (16 ) 5 (11 ) (8 ) 1 (7 ) 44 (12 ) 32 Prior service credit (cost) 3 (1 ) 2 1 — 1 — — — Reclassification to net income: Net experience (gain) loss (5 ) 1 (4 ) (5 ) 1 (4 ) — — — Prior service (credit) cost (1 ) — (1 ) — — — 1 — 1 Available-for-sale securities: Unrealized gain (loss) 4 — 4 — — — — — — Reclassification to net income (4 ) — (4 ) — — — — — — Other comprehensive income (loss) $ 90 $ (16 ) $ 74 $ 4 $ (54 ) $ (50 ) $ 20 $ 98 $ 118 Comprehensive income $ 1,051 $ 1,294 $ 1,372 Net income (loss) attributable to noncontrolling interests 17 8 — Other comprehensive income (loss) attributable to noncontrolling interests — (7 ) — Comprehensive income attributable to Kellogg Company $ 1,034 $ 1,293 $ 1,372
Reclassification out of AOCI	Details about AOCI Components Amount reclassified from AOCI Line item impacted within Income Statement (millions) 2019 2018 2017 (Gains) and losses on cash flow hedges: Foreign currency exchange contracts $ — $ — $ (1 ) COGS Interest rate contracts 4 8 10 Interest expense $ 4 $ 8 $ 9 Total before tax (1 ) (2 ) (3 ) Tax expense (benefit) $ 3 $ 6 $ 6 Net of tax Amortization of postretirement and postemployment benefits: Net experience (gains) $ (5 ) $ (5 ) $ — OIE Prior service (credit) cost (1 ) — 1 OIE $ (6 ) $ (5 ) $ 1 Total before tax 1 1 — Tax expense (benefit) $ (5 ) $ (4 ) $ 1 Net of tax (Gains) losses on available-for-sale securities Corporate bonds $ (4 ) $ — $ — OIE $ (4 ) $ — $ — Total before tax — — — Tax expense (benefit) $ (4 ) $ — $ — Net of tax Total reclassifications $ (6 ) $ 2 $ 7 Net of tax
Summary of Accumulated Other Comprehensive Income (Loss)	(millions) December 28, 2019 December 29, 2018 Foreign currency translation adjustments $ (1,399 ) $ (1,467 ) Cash flow hedges — unrealized net gain (loss) (60 ) (53 ) Postretirement and postemployment benefits: Net experience gain (loss) 7 23 Prior service credit (cost) 4 (3 ) Total accumulated other comprehensive income (loss) $ (1,448 ) $ (1,500 )

Leases and Other Commitments (T

Leases and Other Commitments (Tables)	12 Months Ended
	Dec. 28, 2019
Leases [Abstract]
Schedule of supplemental operating lease information	(millions) Year ended December 28, 2019 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 134 Right-of-use assets obtained in exchange for new operating lease liabilities $ 164 Weighted-average remaining lease term - operating leases 7 years Weighted-average discount rate - operating leases 2.9%
Operating leases future maturities	Under the previous lease standard (Topic 840), at December 29, 2018, future minimum annual lease commitments under non-cancelable operating leases were as follows: (millions) Operating leases 2019 $ 121 2020 97 2021 73 2022 57 2023 48 2024 and beyond 129 Total minimum payments $ 525 At December 28, 2019, future maturities of operating leases were as follows: (millions) Operating leases 2020 $ 129 2021 98 2022 80 2023 67 2024 55 2025 and beyond 181 Total minimum payments $ 610 Less interest (63 ) Present value of lease liabilities $ 547

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 28, 2019
Debt [Abstract]
Schedule of Short-term Debt [Table Text Block]	(millions) 2019 2018 Principal amount Effective interest rate Principal amount Effective interest rate U.S. commercial paper $ 3 1.78 % $ 15 2.75 % Europe commercial paper — — — — Bank borrowings 104 161 Total $ 107 $ 176
Schedule of Debt [Table Text Block]	The following table presents the components of long-term debt at year end December 28, 2019 and December 29, 2018 : (millions) 2019 2018 (a) 4.50% U.S. Dollar Notes due 2046 $ 638 $ 638 (b) 7.45% U.S. Dollar Debentures due 2031 621 621 (c) 4.30% U.S. Dollar Notes due 2028 595 595 (d) 3.40% U.S. Dollar Notes due 2027 596 595 (e) 3.25% U.S. Dollar Notes due 2026 741 731 (f) 1.25% Euro Notes due 2025 689 693 (g) 1.00% Euro Notes due 2024 692 697 (h) 2.65% U.S. Dollar Notes due 2023 539 585 (i) 2.75% U.S. Dollar Notes due 2023 201 198 (j) 3.125% U.S. Dollar Notes due 2022 353 351 (k) 0.80% Euro Notes due 2022 669 684 (l) 1.75% Euro Notes due 2021 558 570 (m) 3.25% U.S. Dollar Notes due 2021 198 399 (n) 4.0% U.S. Dollar Notes due 2020 601 848 (o) 4.15% U.S. Dollar Notes due 2019 — 503 Other 124 9 7,815 8,717 Less current maturities (620 ) (510 ) Balance at year end $ 7,195 $ 8,207 (a) In March 2016, the Company issued $650 million of thirty-year 4.50% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.59% at December 28, 2019. (b) In March 2001, the Company issued long-term debt instruments, primarily to finance the acquisition of Keebler Foods Company, of which $625 million of thirty-year 7.45% Debentures remain outstanding. The effective interest rate on the Debentures, reflecting issuance discount and hedge settlement, was 7.56% at December 28, 2019. The Debentures contain standard events of default and covenants, and can be redeemed in whole or in part by the Company at any time at prices determined under a formula (but not less than 100% of the principal amount plus unpaid interest to the redemption date). (c) In May 2018, the Company issued $600 million of ten-year 4.30% Senior Notes due 2028, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.34% at December 28, 2019. (d) In November 2017, the Company issued $600 million of ten-year 3.40% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of Chicago Bar Company LLC, the maker of RXBAR. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 3.49% at December 28, 2019. (e) In March 2016, the Company issued $750 million of ten-year 3.25% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 4.11% at December 28, 2019 . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling $450 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $6 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (f) In March 2015, the Company issued €600 million (approximately $671 million at December 28, 2019 , which reflects the discount, fees and translation adjustments) of ten-year 1.25% Euro Notes due 2025, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 1.58% at December 28, 2019 . The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. In May 2017, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized gain of $20 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (g) In May 2016, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount, fees and translation adjustments) of eight-year 1.00% Euro Notes due 2024. The proceeds from these Notes were used for general corporate purposes, including, together with cash on hand and additional commercial paper borrowings, repayment of the Company's $750 million , seven-year 4.45% U.S. Dollar Notes due 2016 at maturity. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 0.21% at December 28, 2019 . In November 2016, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. The Company subsequently terminated these swaps. In May of 2019, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The fair value adjustment for the interest rate swaps was $3 million at December 28, 2019 , recorded as an increase in the hedged debt balance. (h) In November 2016, the Company issued $600 million of seven-year 2.65% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of the Company's 1.875% U.S. Dollar Notes due 2016 at maturity and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 3.39% at December 28, 2019 . In 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $50 million of the Notes. In connection with the debt redemption, the Company incurred $2 million of interest expense, consisting primarily of a premium on the tender offer. (i) In February 2013, the Company issued $400 million ( $189 million previously redeemed) of ten-year 2.75% U.S. Dollar Notes, using net proceeds from these Notes for general corporate purposes, including, together with cash on hand, to repay a portion of the Company’s $750 million 4.25% U.S. Dollar Notes that matured in March 2013. The effective interest rate on these Notes, reflecting issuance discount hedge settlement and interest rate swaps, was 4.11% . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $211 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (j) In May 2012, the Company issued $700 million ( $342 million previously redeemed) of ten-year 3.125% U.S. Dollar Notes, using the net proceeds from these Notes for general corporate purposes, including financing a portion of the acquisition of Pringles. The effective interest rate on these Notes, reflecting issuance discount and interest rate swaps, was 3.74% at December 28, 2019 . During 2016 and 2018, the Company entered into interest rate swaps which effectively converted all or a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting $4 million loss at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. (k) In May 2017, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount and translation adjustments) of five-year 0.80% Euro Notes due 2022, using the proceeds from these Notes for general corporate purposes, including, repayment of the Company's $400 million , five-year 1.75% U.S. Dollar Notes due 2017 at maturity. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 0.87% . The Notes were designated as a net investment hedge of the Company's investment in its Europe subsidiary when issued. (l) In May 2014, the Company issued €500 million (approximately $559 million at December 28, 2019 , which reflects the discount and translation adjustments) of seven-year 1.75% Euro Notes due 2021, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 2.37% at December 28, 2019. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. (m) In May 2018, the Company issued $400 million of three-year 3.25% Senior Notes due 2021, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount, was 3.39% as December 28, 2019. In 2019, the Company redeemed $202 million of the Notes. In connection with the dept redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer. (n) In December 2010, the Company issued $1.0 billion ( $150 million previously redeemed) of ten-year 4.0% fixed rate U.S. Dollar Notes, using the net proceeds from these Notes for incremental pension and postretirement benefit plan contributions and to retire a portion of its commercial paper. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 3.37% at December 28, 2019 . During 2016, the Company entered into interest rate swaps, which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps and the resulting gain on termination at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $248 million of the Notes. In connection with the debt redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer, which was partially offset by accelerated gains on pre-issuance interest rate hedges. (o) In November 2009, the Company issued $500 million of ten-year 4.15% fixed rate U.S. Dollar Notes, using net proceeds from these Notes to retire a portion of its 6.6% U.S. Dollar Notes due 2011. In 2012 and 2015, the Company entered into interest rate swaps which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In 2019, the Company redeemed $191 million of the Notes. In connection with the August 2019 debt redemption, the Company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer. In September of 2019, the Company redeemed the remaining $309 million of the Notes. In connection with the September 2019 debt redemption, the company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer.

Stock Compensation (Tables)

Stock Compensation (Tables)	12 Months Ended
	Dec. 28, 2019
Share-based Payment Arrangement [Abstract]
Schedule Of Compensation Expense For Equity Programs And Related Tax Benefits Text Block [Table Text Block]	(millions) 2019 2018 2017 Pre-tax compensation expense $ 61 $ 64 $ 71 Related income tax benefit $ 16 $ 16 $ 26
Schedule of Cash and Tax Benefits Received Upon Exercise of Stock Options and Similar Instruments [Table Text Block]	(millions) 2019 2018 2017 Total cash received from option exercises and similar instruments $ 64 $ 167 $ 97 Tax windfall (shortfall) classified as cash flow from operating activities $ (2 ) $ 11 $ 4
Schedule of Stock Option Valuation Model Assumptions for Grants [Table Text Block]	Stock option valuation model assumptions for grants within the year ended: 2019 2018 2017 Weighted-average expected volatility 18.00 % 18.00 % 18.00 % Weighted-average expected term (years) 6.60 6.60 6.60 Weighted-average risk-free interest rate 2.59 % 2.82 % 2.26 % Dividend yield 3.90 % 3.00 % 2.80 % Weighted-average fair value of options granted $ 6.78 $ 10.00 $ 10.14
Share-based Payment Arrangement, Activity [Table Text Block]	Employee and director stock options Shares (millions) Weighted- average exercise price Weighted- average remaining contractual term (yrs.) Aggregate intrinsic value (millions) Outstanding, beginning of year 14 $ 66 Granted 3 57 Exercised (1 ) 56 Forfeitures and expirations (2 ) 67 Outstanding, end of year 14 $ 65 4.9 $ 55 Exercisable, end of year 10 $ 65 6.1 $ 86 Additionally, option activity for the comparable prior year periods is presented in the following table: (millions, except per share data) 2018 2017 Outstanding, beginning of year 14 15 Granted 3 2 Exercised (2 ) (2 ) Forfeitures and expirations (1 ) (1 ) Outstanding, end of year 14 14 Exercisable, end of year 10 10 Weighted-average exercise price: Outstanding, beginning of year $ 64 $ 62 Granted 70 73 Exercised 58 57 Forfeitures and expirations 71 70 Outstanding, end of year $ 66 $ 64 Exercisable, end of year $ 63 $ 60
Summary of Restricted Stock Summary [Table Text Block]	Employee restricted stock and restricted stock units Shares (thousands) Weighted- average grant-date fair value Non-vested, beginning of year 1,708 $ 65 Granted 287 55 Vested (469 ) 68 Forfeited (340 ) 62 Non-vested, end of year 1,186 $ 61 Additionally, restricted stock unit activity for 2018 and 2017 is presented in the following table: Employee restricted stock and restricted stock units 2018 2017 Shares (in thousands): Non-vested, beginning of year 1,673 1,166 Granted 772 776 Vested (507 ) (109 ) Forfeited (230 ) (160 ) Non-vested, end of year 1,708 1,673 Weighted-average exercise price: Non-vested, beginning of year $ 65 $ 63 Granted 63 65 Vested 59 58 Forfeited 64 65 Non-vested, end of year $ 65 $ 65

Pension Benefits (Tables)

Pension Benefits (Tables) - Pension	12 Months Ended
	Dec. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Components of Company Plan Benefit Expense [Table Text Block]	(millions) 2019 2018 Change in projected benefit obligation Beginning of year $ 5,117 $ 5,648 Service cost 36 87 Interest cost 172 165 Plan participants’ contributions 1 1 Amendments 3 6 Actuarial (gain)loss 766 (384 ) Benefits paid (458 ) (280 ) Curtailment and special termination benefits (13 ) (36 ) Other — 1 Foreign currency adjustments 30 (91 ) End of year $ 5,654 $ 5,117 Change in plan assets Fair value beginning of year $ 4,677 $ 5,043 Actual return on plan assets 874 (299 ) Employer contributions 10 270 Plan participants’ contributions 1 1 Benefits paid (426 ) (236 ) Other — (1 ) Foreign currency adjustments 34 (101 ) Fair value end of year $ 5,170 $ 4,677 Funded status $ (484 ) $ (440 ) Amounts recognized in the Consolidated Balance Sheet consist of Other assets $ 241 $ 228 Other current liabilities (20 ) (17 ) Other liabilities (705 ) (651 ) Net amount recognized $ (484 ) $ (440 ) Amounts recognized in accumulated other comprehensive income consist of Prior service cost $ 37 $ 41 Net amount recognized $ 37 $ 41
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]	(millions) 2019 2018 Projected benefit obligation $ 4,061 $ 3,725 Accumulated benefit obligation $ 4,033 $ 3,689 Fair value of plan assets $ 3,362 $ 3,081
Schedule of Net Benefit Costs [Table Text Block]	(millions) 2019 2018 2017 Service cost $ 36 $ 87 $ 96 Interest cost 172 165 164 Expected return on plan assets (340 ) (361 ) (371 ) Amortization of unrecognized prior service cost 7 8 9 Recognized net (gain) loss 235 269 (36 ) Net periodic benefit cost 110 168 (138 ) Curtailment and special termination benefits (13 ) (30 ) (151 ) Pension (income) expense: Defined benefit plans 97 138 (289 ) Defined contribution plans 20 27 34 Total $ 117 $ 165 $ (255 )
Defined Benefit Plan, Assumptions [Table Text Block]	2019 2018 2017 Discount rate 2.9 % 3.9 % 3.3 % Long-term rate of compensation increase 3.4 % 3.8 % 3.9 % The worldwide weighted-average actuarial assumptions used to determine annual net periodic benefit cost were: 2019 2018 2017 Discount rate 3.7 % 3.3 % 3.6 % Long-term rate of compensation increase 4.0 % 3.9 % 3.9 % Long-term rate of return on plan assets 7.3 % 7.4 % 8.1 %
Schedule of Allocation of Plan Assets [Table Text Block]	(millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 14 $ — $ — $ — $ 14 Corporate stock, common: Domestic 338 — — — 338 International 16 — — — 16 Mutual funds: International equity — — — 36 36 Domestic debt — 4 — — 4 Collective trusts: Domestic equity — — — 498 498 International equity — 117 — 816 933 Other international debt — 718 — 378 1,096 Limited partnerships — — — 228 228 Bonds, corporate — 443 — 211 654 Bonds, government — 774 — — 774 Bonds, other — 70 — — 70 Real estate — — — 412 412 Other — 61 — 36 97 Total $ 368 $ 2,187 $ — $ 2,615 $ 5,170 (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. The fair value of Plan assets at December 29, 2018 are summarized as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 75 $ — $ — $ — $ 75 Corporate stock, common: Domestic 412 — — — 412 International 10 1 — — 11 Mutual funds: International equity — 7 — 34 41 Domestic debt — 53 — — 53 Collective trusts: Domestic equity — — — 437 437 International equity — 92 — 1,330 1,422 Other international debt — — — 331 331 Limited partnerships — — — 283 283 Bonds, corporate — 498 — — 498 Bonds, government — 562 — — 562 Bonds, other — 62 — — 62 Real estate — — — 378 378 Other — 55 — 57 112 Total $ 497 $ 1,330 $ — $ 2,850 $ 4,677 (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.

Nonpension Postretirement and_2

Nonpension Postretirement and Postemployment Benefits (Tables)	12 Months Ended
	Dec. 28, 2019
Nonpension Postretirement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	(millions) 2019 2018 Change in accumulated benefit obligation Beginning of year $ 1,069 $ 1,190 Service cost 15 18 Interest cost 37 36 Actuarial (gain) loss 59 (105 ) Benefits paid (60 ) (67 ) Curtailments (6 ) — Amendments — — Foreign currency adjustments 2 (3 ) End of year $ 1,116 $ 1,069 Change in plan assets Fair value beginning of year $ 1,140 $ 1,292 Actual return on plan assets 282 (91 ) Employer contributions 18 17 Benefits paid (76 ) (78 ) Fair value end of year $ 1,364 $ 1,140 Funded status $ 248 $ 71 Amounts recognized in the Consolidated Balance Sheet consist of Other non-current assets $ 283 $ 107 Other current liabilities (2 ) (2 ) Other liabilities (33 ) (34 ) Net amount recognized $ 248 $ 71 Amounts recognized in accumulated other comprehensive income consist of Prior service credit (59 ) (68 ) Net amount recognized $ (59 ) $ (68 )
Schedule of Net Benefit Costs [Table Text Block]	(millions) 2019 2018 2017 Service cost $ 15 $ 18 $ 18 Interest cost 37 36 37 Expected return on plan assets (86 ) (94 ) (98 ) Amortization of unrecognized prior service credit (9 ) (9 ) (9 ) Recognized net (gain) loss (137 ) 81 (90 ) Net periodic benefit cost (180 ) 32 (142 ) Curtailment (6 ) — 3 Postretirement benefit expense: Defined benefit plans (186 ) 32 (139 ) Defined contribution plans 11 11 16 Total $ (175 ) $ 43 $ (123 )
Defined Benefit Plan, Assumptions [Table Text Block]	2019 2018 2017 Discount rate 3.3 % 4.3 % 3.6 % The weighted-average actuarial assumptions used to determine annual net periodic benefit cost were: 2019 2018 2017 Discount rate 4.0 % 3.6 % 4.0 % Long-term rate of return on plan assets 7.3 % 7.5 % 8.5 %
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]	(millions) One percentage point increase One percentage point decrease Effect on total of service and interest cost components $ 3 $ (2 ) Effect on postretirement benefit obligation 77 (66 )
Schedule of Allocation of Plan Assets [Table Text Block]	(millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 8 $ 1 $ — $ — $ 9 Corporate stock, common: Domestic 242 — — — 242 International 11 — — — 11 Mutual funds: Domestic equity — 35 — — 35 International equity — — — — — Domestic debt — 53 — — 53 Collective trusts: Domestic equity — — — 286 286 International equity — — — 293 293 Limited partnerships — — — 124 124 Bonds, corporate — 136 — — 136 Bonds, government — 77 — — 77 Bonds, other — 9 — — 9 Real estate — — — 88 88 Other — 1 — — 1 Total $ 261 $ 312 $ — $ 791 $ 1,364 (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. The fair value of Plan assets at December 29, 2018 are summarized as follows: (millions) Total Level 1 Total Level 2 Total Level 3 Total NAV (practical expedient)(a) Total Cash and cash equivalents $ 2 $ 1 $ — $ — $ 3 Corporate stock, common: Domestic 108 — — — 108 International 5 1 — — 6 Mutual funds: Domestic equity — 37 — — 37 International equity — — — — — Domestic debt — 42 — — 42 Collective trusts: Domestic equity — — — 281 281 International equity — — — 228 228 Limited partnerships — — — 199 199 Bonds, corporate — 95 — — 95 Bonds, government — 50 — — 50 Bonds, other — 7 — 83 90 Other — 1 — — 1 Total $ 115 $ 234 $ — $ 791 $ 1,140 (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.
Postemployment [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	(millions) 2019 2018 Change in accumulated benefit obligation Beginning of year $ 42 $ 43 Service cost 3 3 Interest cost 2 1 Actuarial (gain)loss 8 3 Benefits paid (7 ) (8 ) Amendments — — Foreign currency adjustments — — End of year $ 48 $ 42 Funded status $ (48 ) $ (42 ) Amounts recognized in the Consolidated Balance Sheet consist of Other current liabilities $ (7 ) $ (5 ) Other liabilities (41 ) (37 ) Net amount recognized $ (48 ) $ (42 ) Amounts recognized in accumulated other comprehensive income consist of Net prior service cost $ 3 $ 4 Net experience gain (22 ) (38 ) Net amount recognized $ (19 ) $ (34 )
Schedule of Net Benefit Costs [Table Text Block]	(millions) 2019 2018 2017 Service cost $ 3 $ 3 $ 6 Interest cost 2 1 3 Amortization of unrecognized prior service cost 1 1 1 Recognized net loss (5 ) (5 ) — Net periodic benefit cost $ 1 $ — $ 10 Settlement cost (3 ) — — Postemployment benefit expense $ (2 ) $ — $ 10
Schedule of Expected Benefit Payments [Table Text Block]	(millions) Postretirement Postemployment 2020 $ 66 $ 8 2021 67 6 2022 67 5 2023 68 5 2024 68 5 2025-2029 337 20

Multipemployer Pension and Po_2

Multipemployer Pension and Postretirement Plans (Tables)	12 Months Ended
	Dec. 28, 2019
Multiemployer Plans [Abstract]
Schedule of Multiemployer Plans [Table Text Block]	PPA Zone Status Contributions (millions) Pension trust fund EIN/PN 2019 2018 FIP/RP Status 2019 2018 2017 Surcharge Imposed Expiration Date of CBA Bakery and Confectionery Union and Industry International Pension Fund (a) 52-6118572 / Red - 12/31/2019 Red - 12/31/2018 Implemented $ 5.9 $ 6.5 $ 6.6 Yes 12/17/2020 to Central States, Southeast and Southwest Areas Pension Fund 36-6044243 / Red - 12/31/2019 Red - 12/31/2018 Implemented 1.3 1.9 4.8 Yes (c) Western Conference of Teamsters Pension Trust 91-6145047 / Green - 12/31/2019 Green - 12/31/2018 NA 0.8 1.0 1.4 No 3/26/2022 (d) Other Plans 0.7 1.0 3.1 (e) Total contributions: $ 8.7 $ 10.4 $ 15.9 (a) The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 80 percent of the Company’s participants in this fund are covered by a single CBA that expires on 3/16/2021. (b) During 2017, the Company terminated certain CBAs covered by these funds. Because of the Company's level of continuing involvement in each fund, the Company does not anticipate being subject to a withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019. (c) During 2019, the Company terminated CBAs covered by this fund. As a result, the Company has withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect to make 2020 contributions. (d) During 2017, the Company terminated certain CBAs covered by this fund. As a result, the Company has partially withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019. (e) During 2017 and 2019, the Company terminated the CBAs covered by certain of these funds. As a result, for the impacted funds, the Company recognized expense for the estimated withdrawal liability in each year and no longer made contributions following the termination. The Company does not expect 2020 contributions to the remaining funds to be materially different from 2019.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax and Provision for Income Taxes [Table Text Block]	(millions) 2019 2018 2017 Income before income taxes United States $ 938 $ 851 $ 1,097 Foreign 367 478 560 1,305 1,329 1,657 Income taxes Currently payable Federal 345 7 358 State 52 28 31 Foreign 77 99 79 474 134 468 Deferred Federal (124 ) 109 (41 ) State (29 ) (59 ) 8 Foreign — (3 ) (25 ) (153 ) 47 (58 ) Total income taxes $ 321 $ 181 $ 410
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2019 2018 2017 U.S. statutory income tax rate 21.0 % 21.0 % 35.0 % Foreign rates varying from U.S. statutory rate (2.5 ) (3.0 ) (6.7 ) Excess tax benefits on share-based compensation — (0.3 ) (0.3 ) State income taxes, net of federal benefit 1.3 1.5 1.4 Cost (benefit) of remitted and unremitted foreign earnings 0.8 0.7 0.1 Legal entity restructuring, deferred tax impact — (3.3 ) — Discretionary pension contributions — (2.3 ) — Revaluation of investment in foreign subsidiary 2.5 — — Net change in valuation allowance (1.6 ) 2.0 (0.4 ) U.S. deduction for qualified production activities — — (1.4 ) Statutory rate changes, deferred tax impact 0.3 — (9.0 ) U.S. deemed repatriation tax — (1.2 ) 10.4 Intangible property transfer — — (2.4 ) Divestiture 2.9 — — Out-of-period adjustment 3.0 — — Other (3.1 ) (1.5 ) (1.9 ) Effective income tax rate 24.6 % 13.6 % 24.8 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	Deferred tax assets Deferred tax liabilities (millions) 2019 2018 2019 2018 U.S. state income taxes $ — $ — $ 6 $ 19 Advertising and promotion-related 11 11 — — Wages and payroll taxes 15 20 — — Inventory valuation 17 14 — — Employee benefits 143 132 — — Operating loss, credit and other carryforwards 279 270 — — Hedging transactions 9 10 — — Depreciation and asset disposals — — 217 220 Trademarks and other intangibles — — 526 613 Deferred compensation 19 20 — — Stock options 29 31 — — Other 9 26 — — 531 534 749 852 Less valuation allowance (146 ) (166 ) — — Total deferred taxes $ 385 $ 368 $ 749 $ 852 Net deferred tax asset (liability) $ (364 ) $ (484 ) Classified in balance sheet as: Other assets $ 231 $ 246 Other liabilities (595 ) (730 ) Net deferred tax asset (liability) $ (364 ) $ (484 )
Summary of Valuation Allowance [Table Text Block]	(millions) 2019 2018 2017 Balance at beginning of year $ 166 $ 153 $ 131 Additions charged to income tax expense 25 29 35 Reductions credited to income tax expense (a) (47 ) (1 ) (28 ) Currency translation adjustments 2 (15 ) 15 Balance at end of year $ 146 $ 166 $ 153
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]	(millions) 2019 2018 2017 Balance at beginning of year $ 97 $ 60 $ 63 Tax positions related to current year: Additions (a) 5 51 6 Tax positions related to prior years: Additions 4 4 5 Reductions (14 ) (13 ) (8 ) Settlements (1 ) (4 ) (4 ) Lapses in statutes of limitation (1 ) (1 ) (2 ) Balance at end of year $ 90 $ 97 $ 60

Derivative Instruments and Fa_2

Derivative Instruments and Fair Value Measurements (Tables)	12 Months Ended
	Dec. 28, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Total Notional Amounts of the Company's Derivative Instruments	(millions) 2019 2018 Foreign currency exchange contracts $ 2,628 $ 1,863 Cross-currency contracts 1,540 1,197 Interest rate contracts 1,871 1,608 Commodity contracts 524 417 Total $ 6,563 $ 5,085
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table presents assets and liabilities that were measured at fair value in the Consolidated Balance Sheet on a recurring basis as of December 28, 2019 and December 29, 2018 : Derivatives designated as hedging instruments 2019 2018 (millions) Level 1 Level 2 Total Level 1 Level 2 Total Assets: Cross currency contracts: Other current assets $ — $ 45 $ 45 $ — $ — $ — Other Assets — 40 40 — 79 79 Interest rate contracts (a): Other current assets — 7 7 — — — Other assets — 4 4 — 17 17 Total assets $ — $ 96 $ 96 $ — $ 96 $ 96 Liabilities: Interest rate contracts (a): Other current liabilities $ — $ (4 ) $ (4 ) $ — $ — $ — Other liabilities — — — — (22 ) (22 ) Total liabilities $ — $ (4 ) $ (4 ) $ — $ (22 ) $ (22 ) (a) The fair value of the related hedged portion of the Company’s long-term debt, a level 2 liability, was $0.7 billion and $1.6 billion as of December 28, 2019 and December 29, 2018 , respectively. Derivatives not designated as hedging instruments 2019 2018 (millions) Level 1 Level 2 Total Level 1 Level 2 Total Assets: Foreign currency exchange contracts: Other current assets $ — $ 12 $ 12 $ — $ 3 $ 3 Commodity contracts: Other current assets 9 — 9 3 — 3 Total assets $ 9 $ 12 $ 21 $ 3 $ 3 $ 6 Liabilities: Foreign currency exchange contracts: Other current liabilities $ — (18 ) $ (18 ) $ — $ (4 ) $ (4 ) Interest rate contracts: Other liabilities — (13 ) (13 ) — — — Commodity contracts: Other current liabilities (1 ) — (1 ) (9 ) — (9 ) Total liabilities $ (1 ) $ (31 ) $ (32 ) $ (9 ) $ (4 ) $ (13 )
Schedule of Derivative Instruments in Statement of Financial Position Fair Value	The following amounts were recorded on the Consolidated Balance Sheet related to cumulative basis adjustments for existing fair value hedges as of December 28, 2019 and December 29, 2018 . (millions) Line Item in the Consolidated Balance Sheet in which the hedged item is included Carrying amount of the hedged liabilities Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged liabilities (a) December 28, December 29, December 28, December 29, Interest rate contracts Current maturities of long-term debt $ 493 $ 503 $ — $ 3 Interest rate contracts Long-term debt $ 2,643 $ 3,354 $ 19 $ (18 ) (a) The current maturities of hedged long-term debt includes $3 million of hedging adjustment on discontinued hedging relationships as of December 29, 2018 . The hedged long-term debt includes $15 million and $(12) million of hedging adjustment on discontinued hedging relationships as of December 28, 2019 and December 29, 2018 , respectively.
Offsetting Assets	As of December 28, 2019 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 117 $ (27 ) $ (7 ) $ 83 Total liability derivatives $ (36 ) $ 27 $ — $ (9 ) As of December 29, 2018 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 102 $ (27 ) $ (2 ) $ 73 Total liability derivatives $ (35 ) $ 27 $ — $ (8 )
Offsetting Liabilities	As of December 28, 2019 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 117 $ (27 ) $ (7 ) $ 83 Total liability derivatives $ (36 ) $ 27 $ — $ (9 ) As of December 29, 2018 Gross Amounts Not Offset in the Consolidated Balance Sheet Amounts Presented in the Consolidated Balance Sheet Financial Instruments Cash Collateral Received/ Posted Net Amount Total asset derivatives $ 102 $ (27 ) $ (2 ) $ 73 Total liability derivatives $ (35 ) $ 27 $ — $ (8 )
Schedule of the Effect of Derivative Instrument on the Consolidated Statement of Income	The effect of derivative instruments on the Consolidated Statement of Income for the years ended December 28, 2019 and December 29, 2018 were as follows: Derivatives and non-derivatives in net investment hedging relationships (millions) Gain (loss) recognized in AOCI Gain (loss) excluded from assessment of hedge effectiveness Location of gain (loss) in income of excluded component 2019 2018 2019 2018 Foreign currency denominated long-term debt $ 60 $ 129 $ — $ — Cross-currency contracts 6 79 34 16 Interest expense Total $ 66 $ 208 $ 34 $ 16 Derivatives not designated as hedging instruments (millions) Location of gain (loss) recognized in income Gain (loss) recognized in income 2019 2018 Foreign currency exchange contracts COGS $ (16 ) $ 19 Foreign currency exchange contracts SGA (2 ) 1 Foreign currency exchange contracts OIE (4 ) — Commodity contracts COGS 4 (23 ) Commodity contracts SGA — — Total $ (18 ) $ (3 ) The effect of fair value and cash flow hedge accounting on the Consolidated Income Statement for the years ended December 28, 2019 and December 29, 2018 : December 28, 2019 December 29, 2018 (millions) Interest Expense Interest Expense Total amounts of income and expense line items presented in the Consolidated Income Statement in which the effects of fair value or cash flow hedges are recorded $ 284 $ 287 Gain (loss) on fair value hedging relationships: Interest contracts: Hedged items (33 ) (5 ) Derivatives designated as hedging instruments 37 9 Gain (loss) on cash flow hedging relationships: Interest contracts: Amount of gain (loss) reclassified from AOCI into income (4 ) (8 ) Foreign exchange contracts: Amount of gain (loss) reclassified from AOCI into income — —
Available-for-sale securities	The following is a summary of the carrying and market values of the Company's available for sale securities: 2019 2018 (millions) Cost Unrealized Gain (Loss) Market Value Cost Unrealized Gain/(Loss) Market Value Corporate Bonds $ — $ — $ — $ 59 $ — $ 59

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 28, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule Of Quarterly Financial Data Net Sales And Gross Profit [Table Text Block]	Net sales Gross profit (millions) 2019 2018 2019 2018 First $ 3,522 $ 3,401 $ 1,107 $ 1,252 Second 3,461 3,360 1,186 1,209 Third 3,372 3,469 1,000 1,176 Fourth 3,223 3,317 1,088 1,089 $ 13,578 $ 13,547 $ 4,381 $ 4,726
Schedule Of Quarterly Financial Data Net Income And Earnings Per Share [Table Text Block]	Net income (loss) attributable to Kellogg Company Per share amounts (millions) 2019 2018 2019 2018 Basic Diluted Basic Diluted First $ 282 $ 444 $ 0.82 $ 0.82 $ 1.28 $ 1.27 Second 286 596 0.84 0.84 1.72 1.71 Third 247 380 0.73 0.72 1.10 1.09 Fourth (a) 145 (84 ) 0.43 0.42 (0.24 ) (0.24 ) $ 960 $ 1,336
Schedule Of Quarterly Financial Data Dividends Per Share And Stock Prices [Table Text Block]	Quarter 2019 2018 First $ 0.56 $ 0.54 Second 0.56 0.54 Third 0.57 0.56 Fourth 0.57 0.56 $ 2.26 $ 2.20
Schedule Of Quarterly Financial Data Charges Gain In Operating Profit [Table Text Block]	During 2019 , the Company recorded the following in operating profit and other income (expense): 2019 (millions) First Second Third Fourth Full Year Operating profit Restructuring and cost reduction charges $ (8 ) $ (65 ) $ (18 ) $ (27 ) $ (118 ) Gains / (losses) on mark-to-market adjustments (42 ) 46 (11 ) — (7 ) Other income (expense) Restructuring and cost reduction charges $ — $ — $ — $ 5 $ 5 Gains / (losses) on mark-to-market adjustments 1 (11 ) 32 (120 ) $ (98 ) During 2018 , the Company recorded the following in operating profit and other income (expense): 2018 (millions) First Second Third Fourth Full Year Operating profit Restructuring and cost reduction charges $ (20 ) $ (5 ) $ (64 ) $ (84 ) $ (173 ) Gains / (losses) on mark-to-market adjustments 30 3 (11 ) (15 ) 7 Other income (expense) Restructuring and cost reduction charges $ — $ — $ 30 $ — $ 30 Gains / (losses) on mark-to-market adjustments 9 2 36 (397 ) $ (350 )

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 28, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	(millions) 2019 2018 2017 Net sales North America 8,390 8,688 8,673 Europe 2,092 2,122 2,050 Latin America 940 947 944 AMEA 2,156 1,790 1,187 Consolidated $ 13,578 $ 13,547 $ 12,854 Operating profit North America (a)(b) 1,215 1,397 1,246 Europe 222 251 220 Latin America 85 102 108 AMEA 195 174 140 Total Reportable Segments 1,717 1,924 1,714 Corporate (b) (316 ) (218 ) (327 ) Consolidated $ 1,401 $ 1,706 $ 1,387 Depreciation and amortization (c) North America 291 341 330 Europe 80 78 78 Latin America 30 37 37 AMEA 76 57 35 Total Reportable Segments 477 513 480 Corporate 7 3 1 Consolidated $ 484 $ 516 $ 481 (a) During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million . (b) Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million , respectively. (c) Includes asset impairment charges as discussed in Note 14 .
Schedule of Interest Expense and Income Tax Expense by Segment [Table Text Block]	(millions) 2019 2018 2017 Interest expense North America $ — $ 1 $ 3 Europe 6 6 14 Latin America 9 3 2 AMEA 14 9 4 Corporate 255 268 233 Consolidated $ 284 $ 287 $ 256 Income taxes Europe $ 48 $ 23 $ (37 ) Latin America 16 30 33 AMEA 23 23 10 Corporate & North America 234 105 404 Consolidated $ 321 $ 181 $ 410
Schedule of Additions to Long Lived Assets by Segment [Table Text Block]	(millions) 2019 2018 2017 Additions to long-lived assets North America $ 356 $ 336 $ 329 Europe 83 84 102 Latin America 41 76 32 AMEA 101 79 34 Corporate 5 3 4 Consolidated $ 586 $ 578 $ 501
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	(millions) 2019 2018 2017 Net sales United States $ 7,885 $ 8,176 $ 8,160 All other countries 5,693 5,371 4,694 Consolidated $ 13,578 $ 13,547 $ 12,854 Long-lived assets United States $ 1,996 $ 2,197 $ 2,195 All other countries 1,616 1,534 1,521 Consolidated $ 3,612 $ 3,731 $ 3,716
Revenue from External Customers by Products and Services [Table Text Block]	(millions) 2019 2018 2017 Snacks $ 6,663 $ 6,797 $ 6,683 Cereal 5,029 5,203 5,222 Frozen 1,037 1,020 949 Noodles and other 849 527 — Consolidated $ 13,578 $ 13,547 $ 12,854

Supplemental Financial Statem_2

Supplemental Financial Statement Data (Tables)	12 Months Ended
	Dec. 28, 2019
Supplemental Financial Statement Data [Abstract]
Supplemental Financial Data Consolidated Statement Of Income [Table Text Block]	Consolidated Statement of Income (millions) 2019 2018 2017 Research and development expense $ 144 $ 154 $ 148 Advertising expense $ 676 $ 752 $ 732
Supplemental Financial Data Consolidated Balance Sheet [Table Text Block]	Consolidated Balance Sheet (millions) 2019 2018 Trade receivables $ 1,315 $ 1,163 Allowance for doubtful accounts (10 ) (10 ) Refundable income taxes 56 28 Other receivables 215 194 Accounts receivable, net $ 1,576 $ 1,375 Raw materials, spare parts, and supplies $ 303 $ 339 Finished goods and materials in process 923 991 Inventories $ 1,226 $ 1,330 Land $ 116 $ 120 Buildings 2,021 2,061 Machinery and equipment 5,852 5,971 Capitalized software 496 438 Construction in progress 566 583 Accumulated depreciation (5,439 ) (5,442 ) Property, net $ 3,612 $ 3,731 Other intangibles $ 2,677 $ 3,448 Accumulated amortization (101 ) (87 ) Other intangibles, net $ 2,576 $ 3,361 Pension $ 241 $ 228 Deferred income taxes 231 246 Other 667 594 Other assets $ 1,139 $ 1,068 Accrued income taxes $ 42 $ 48 Accrued salaries and wages 290 309 Accrued advertising and promotion 641 557 Other 577 502 Other current liabilities $ 1,550 $ 1,416 Income taxes payable $ 81 $ 115 Nonpension postretirement benefits 33 34 Other 429 355 Other liabilities $ 543 $ 504
Supplemental Financial Data Allowance For Doubtful Accounts [Table Text Block]	Allowance for doubtful accounts (millions) 2019 2018 2017 Balance at beginning of year $ 10 $ 10 $ 8 Additions charged to expense 9 4 14 Doubtful accounts charged to reserve (9 ) (4 ) (12 ) Balance at end of year $ 10 $ 10 $ 10

Accounting Policies (Details)

Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 30, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 30, 2018
Accounting Policies and New Accounting Standards [Line Items]
Assets		$ 17,564	$ 17,780
Income tax examination percentage likelihood of being realized upon settlement		50.00%
Maximum length of time, forward contracts and options		18 months
Maximum length of time hedged in price risk cash flow hedge		18 months
Payables Placed On Tracking System		$ 812	893
Payables Financed By Participating Suppliers		605	701
Excess Tax Benefit from Share-based Compensation, Operating Activities		(2)	11	$ 4
Reductions credited to income tax expense		(47)	(1)	$ (28)
Income tax credits and adjustments, transfer of intellectual property		39
Reclassification of tax effects relating to U.S. Tax Reform		$ 0
GILTI percentage excess of shareholder net tested income		50.00%
Credit for percentage of taxes paid or accrued for tested income of controlled foreign corporations		80.00%
Operating lease, right-of-use assets		$ 541	$ 0
Operating lease, liability		$ 547
Minimum
Accounting Policies and New Accounting Standards [Line Items]
Expected rates of return		25th
Maximum
Accounting Policies and New Accounting Standards [Line Items]
Expected rates of return		75th
Machinery and Equipment [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		15 years
Machinery and Equipment [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		30 years
Office Equipment [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Computer Equipment and Capitalized Software [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Computer Equipment and Capitalized Software [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Building [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Building [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		50 years
Building Components [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Leases ASU
Accounting Policies and New Accounting Standards [Line Items]
Operating lease, right-of-use assets					$ 453
Operating lease, liability					$ 461
AOCI
Accounting Policies and New Accounting Standards [Line Items]
Reclassification of tax effects relating to U.S. Tax Reform	$ (22)	$ (22)
Retained earnings
Accounting Policies and New Accounting Standards [Line Items]
Reclassification of tax effects relating to U.S. Tax Reform	$ 22	$ 22

Sale of Accounts Receivable (De

Sale of Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Monetization Program
Transfer of Financial Assets Accounted for as Sales [Line Items]
Gain (Loss) on Sale of Accounts Receivable	$ (25)	$ (26)	$ (11)
Monetization Program | Maximum
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfers Of Accounts Receivable Agreements	1,033
Monetization Program | Sold And Outstanding
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Accounts Receivable Agreements	774	900
Kellogg Foreign Subsidiaries Program | Sold And Outstanding
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Accounts Receivable Agreements	$ 89	$ 93

Divestiures, West Africa Inve_3

Divestiures, West Africa Investments and Acquisitions Divestiture (Details) - USD ($) $ in Millions	Jul. 28, 2019	Dec. 28, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses			$ 1,332	$ 0	$ 0
Debt repurchase amount		$ 1,000	1,000
Income taxes paid		$ 255	$ 537	$ 188	$ 352
Transition Services Agreement duration			18 months
Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses	$ 1,300
Net assets	$ 1,300
Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses | Other income (expense)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of business			$ 38
Disposition related transaction costs			14
U.S. pension and nonpension postretirement plans | Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Curtailment gain			$ 17

Divestiures, West Africa Inve_4

Divestiures, West Africa Investments and Acquisitions Multipro Acquisition Narrative (Details) - USD ($) $ in Millions	May 02, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	May 02, 2018
Business Acquisition [Line Items]
Purchase price adjustments			$ 0
Equity Method Investment, Realized Gain (Loss) on Disposal		$ 0	200	$ 0
Goodwill		$ 5,861	6,050	$ 5,504
Multipro
Business Acquisition [Line Items]
Equity method investment incremental ownership percentage					1.00%
Purchase price adjustments			$ 1
Equity method investment ownership percentage			51.00%
Equity Method Investment, Realized Gain (Loss) on Disposal			$ 245
Goodwill					$ 616
Tolaram Africa Foods (TAF) PTE LTD
Business Acquisition [Line Items]
Payments to acquire businesses, gross	$ 419
Equity method investment ownership percentage					50.00%
TAF Investment in Affiliated Food Manufacturer
Business Acquisition [Line Items]
Equity method investment ownership percentage					49.00%
Affiliated Food Manufacturer
Business Acquisition [Line Items]
Equity method investment ownership percentage					24.50%
Multipro and Tolaram Africa Foods PTE LTD
Business Acquisition [Line Items]
Aggregate consideration paid and fair value of previously held equity investment			626
Aggregate consideration paid and fair value of previously held equity investment, net of cash acquired			$ 617

Divestiures, West Africa Inve_5

Divestiures, West Africa Investments and Acquisitions Multipro Schedule of Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	May 02, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Goodwill	$ 5,861	$ 6,050		$ 5,504
Multipro
Business Acquisition [Line Items]
Current assets			$ 118
Property			41
Goodwill			616
Intangible assets subject to amortization, primarily customer relationships			425
Intangible assets not subject to amortization, primarily distribution rights			373
Deferred tax liability		(2)	(254)
Other liabilities		$ (2)	(150)
Non-controlling interests			(552)
Net assets acquired (liabilities assumed), net			$ 617

Divestiures, West Africa Inve_6

Divestiures, West Africa Investments and Acquisitions Multipro Schedule of Acquired Assets and Assumed Liabilities Narrative (Details) - Multipro - USD ($) $ in Millions	Dec. 29, 2018	May 02, 2018
Business Acquisition [Line Items]
Deferred tax liability	$ (2)	$ (254)
Other liabilities	$ 2	$ 150

Divestiures, West Africa Inve_7

Divestiures, West Africa Investments and Acquisitions Multipro Schedule of Pro Forma Results Narrative (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018		Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Net sales	$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317		$ 3,469	$ 3,360	$ 3,401	$ 13,578	$ 13,547	$ 12,854
Net income attributable to Kellogg	$ 145	$ 247	$ 286	$ 282	$ (84)	[1]	$ 380	$ 596	$ 444	960	1,336	1,254
Equity Method Investment, Realized Gain (Loss) on Disposal										$ 0	200	$ 0
Multipro
Business Acquisition [Line Items]
Net sales											536
Net income attributable to Kellogg											8
Equity Method Investment, Realized Gain (Loss) on Disposal											$ 245
[1]	The significant decrease in the fourth quarter 2018 net income is primarily due to a mark-to-market adjustment recognized on pension assets.

Divestiures, West Africa Inve_8

Divestiures, West Africa Investments and Acquisitions Multipro Schedule of Pro Forma Results (Details) - Multipro - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Pro forma net sales	$ 13,829	$ 13,511
Pro forma net income attributable to Kellogg Company	$ 1,336	$ 1,255

Divestiures, West Africa Inve_9

Divestiures, West Africa Investments and Acquisitions Investment in TAF Narrative (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Net sales	$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578	$ 13,547	$ 12,854
Tolaram Africa Foods (TAF) PTE LTD
Business Acquisition [Line Items]
Equity method investment, aggregate cost					$ 458					458
Equity Method Investment, Other than Temporary Impairment										45
Net sales									$ 581	$ 350

Divestiures, West Africa Inv_10

Divestiures, West Africa Investments and Acquisitions RXBAR Acquisition Narrative (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended								12 Months Ended
		Oct. 31, 2017	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019		Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired											$ 8		$ 28	$ 592
Goodwill, purchase accounting adjustments													0
Net sales			$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	13,578		13,547	12,854
Operating profit											1,401		1,706	1,387
RXBAR
Business Acquisition [Line Items]
Payments to acquire businesses, gross		$ 600
Payments to acquire businesses, net of cash acquired		596
Goodwill, purchase accounting adjustments		$ (1)
North America
Business Acquisition [Line Items]
Goodwill, purchase accounting adjustments													0
Net sales											8,390		8,688	8,673
Operating profit	[1]										$ 1,215	[2]	$ 1,397	1,246
North America | RXBAR
Business Acquisition [Line Items]
Net sales														27
Operating profit														$ 1
[1]	Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million , respectively.
[2]	During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million .

Divestiures, West Africa Inv_11

Divestiures, West Africa Investments and Acquisitions RXBAR Schedule of Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Oct. 27, 2017
Business Acquisition [Line Items]
Goodwill	$ 5,861	$ 6,050	$ 5,504
RXBAR
Business Acquisition [Line Items]
Current assets				$ 42
Goodwill				373
Intangible assets not subject to amortization, primarily distribution rights and indefinite lived brands				203
Current liabilities				(23)
Net assets acquired (liabilities assumed), net				$ 595

Divestiures, West Africa Inv_12

Divestiures, West Africa Investments and Acquisitions RXBAR Schedule of Acquired Assets and Assumed Liabilities Narrative (Details) $ in Millions	Dec. 29, 2018USD ($)
RXBAR
Business Acquisition [Line Items]
Amortizable intangible assets	$ 2

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018
Goodwill [Roll Forward]
Goodwill		$ 6,050	$ 5,504
Goodwill Additions			616
Divestiture		(191)
Goodwill, purchase price allocation adjustment			(2)
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Currency Translation Adjustments		2	(68)
Goodwill		5,861	6,050
North America
Goodwill [Roll Forward]
Goodwill		4,611	4,617
Goodwill Additions			0
Divestiture	$ (191)	(191)
Goodwill, purchase price allocation adjustment			(2)
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Currency Translation Adjustments		2	(4)
Goodwill		4,422	4,611
Europe
Goodwill [Roll Forward]
Goodwill		346	368
Goodwill Additions			0
Divestiture		0
Goodwill, purchase price allocation adjustment			0
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Currency Translation Adjustments		1	(22)
Goodwill		347	346
Latin America
Goodwill [Roll Forward]
Goodwill		218	244
Goodwill Additions			0
Divestiture		0
Goodwill, purchase price allocation adjustment			0
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Currency Translation Adjustments		(5)	(26)
Goodwill		213	218
AMEA
Goodwill [Roll Forward]
Goodwill		875	275
Goodwill Additions			616
Divestiture		0
Goodwill, purchase price allocation adjustment			0
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Currency Translation Adjustments		4	(16)
Goodwill		$ 879	$ 875

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019		Dec. 29, 2018
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance	$ 608		$ 201
Additions	2		425
Divestiture	(12)
Purchase price allocation adjustment			2
Currency translation adjustment	(4)		(20)
Gross carrying amount, ending balance	594		608
Accumulated amortization, beginning balance	87		67
Amortization (a)	27	[1]	23
Divestiture	(12)
Currency translation adjustment accumulated amortization	(1)		(3)
Accumulated amortization, ending balance	101		87
Intangible assets subject to amortization net, beginning balance	521		134
Additions	2		425
Amortization	(27)	[1]	(23)
Divestiture	0
Purchase price allocation adjustment net			2
Currency translation adjustment net	(3)		(17)
Intangible assets subject to amortization net, ending balance	493		521
Estimated aggregate annual amortization expense for next twelve months	28
Estimated aggregate annual amortization expense for year two	28
Estimated aggregate annual amortization expense for year three	28
Estimated aggregate annual amortization expense for year four	28
Estimated aggregate annual amortization expense for year five	28
North America
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance	74		72
Additions	2		0
Divestiture	(12)
Purchase price allocation adjustment			2
Currency translation adjustment	0		0
Gross carrying amount, ending balance	64		74
Accumulated amortization, beginning balance	39		35
Amortization (a)	4	[1]	4
Divestiture	(12)
Currency translation adjustment accumulated amortization	0		0
Accumulated amortization, ending balance	31		39
Intangible assets subject to amortization net, beginning balance	35		37
Additions	2		0
Amortization	(4)	[1]	(4)
Divestiture	0
Purchase price allocation adjustment net			2
Currency translation adjustment net	0		0
Intangible assets subject to amortization net, ending balance	33		35
Europe
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance	43		45
Additions	0		0
Divestiture	0
Purchase price allocation adjustment			0
Currency translation adjustment	(2)		(2)
Gross carrying amount, ending balance	41		43
Accumulated amortization, beginning balance	20		18
Amortization (a)	2	[1]	3
Divestiture	0
Currency translation adjustment accumulated amortization	(1)		(1)
Accumulated amortization, ending balance	21		20
Intangible assets subject to amortization net, beginning balance	23		27
Additions	0		0
Amortization	(2)	[1]	(3)
Divestiture	0
Purchase price allocation adjustment net			0
Currency translation adjustment net	(1)		(1)
Intangible assets subject to amortization net, ending balance	20		23
Latin America
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance	63		74
Additions	0		0
Divestiture	0
Purchase price allocation adjustment			0
Currency translation adjustment	(3)		(11)
Gross carrying amount, ending balance	60		63
Accumulated amortization, beginning balance	12		10
Amortization (a)	3	[1]	4
Divestiture	0
Currency translation adjustment accumulated amortization	0		(2)
Accumulated amortization, ending balance	15		12
Intangible assets subject to amortization net, beginning balance	51		64
Additions	0		0
Amortization	(3)	[1]	(4)
Divestiture	0
Purchase price allocation adjustment net			0
Currency translation adjustment net	(3)		(9)
Intangible assets subject to amortization net, ending balance	45		51
AMEA
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance	428		10
Additions	0		425
Divestiture	0
Purchase price allocation adjustment			0
Currency translation adjustment	1		(7)
Gross carrying amount, ending balance	429		428
Accumulated amortization, beginning balance	16		4
Amortization (a)	18	[1]	12
Divestiture	0
Currency translation adjustment accumulated amortization	0		0
Accumulated amortization, ending balance	34		16
Intangible assets subject to amortization net, beginning balance	412		6
Additions	0		425
Amortization	(18)	[1]	(12)
Divestiture	0
Purchase price allocation adjustment net			0
Currency translation adjustment net	1		(7)
Intangible assets subject to amortization net, ending balance	$ 395		$ 412
[1]	The currently estimated aggregate amortization expense for each of the next five succeeding fiscal periods is approximately $28 million per year through 2024.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets Intangible Assets Not Subject to Amortization (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		$ 2,840	$ 2,505
Additions		18	373
Purchase price allocation adjustments		(765)	0
Currency translation adjustment		(10)	(38)
Intangible assets not subject to amortization, ending balance		2,083	2,840
North America
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		1,985	1,985
Additions	$ 18	18	0
Purchase price allocation adjustments		(765)	0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		1,238	1,985
Europe
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		401	420
Additions		0	0
Purchase price allocation adjustments		0	0
Currency translation adjustment		(9)	(19)
Intangible assets not subject to amortization, ending balance		392	401
Latin America
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		73	86
Additions		0	0
Purchase price allocation adjustments		0	0
Currency translation adjustment		(3)	(13)
Intangible assets not subject to amortization, ending balance		70	73
AMEA
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		381	14
Additions		0	373
Purchase price allocation adjustments		0	0
Currency translation adjustment		2	(6)
Intangible assets not subject to amortization, ending balance		$ 383	$ 381

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets Annual Impairment Testing (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018	Mar. 30, 2019	Dec. 30, 2017
Indefinite-lived Intangible Assets [Line Items]
Goodwill and other intangible assets		$ 8,400
Other intangible assets excluding goodwill		2,083	$ 2,840		$ 2,505
Goodwill		5,861	6,050		5,504
Divestiture Goodwill		191
Indefinite-lived intangible assets acquired		18	373
Europe transfer to AMEA
Indefinite-lived Intangible Assets [Line Items]
Goodwill				$ 46
North America
Indefinite-lived Intangible Assets [Line Items]
Other intangible assets excluding goodwill		1,238	1,985		1,985
Goodwill		4,422	4,611		$ 4,617
Divestiture Goodwill	$ 191	191
Divestiture net intangibles	765
Indefinite-lived intangible assets acquired	$ 18	18	$ 0
Pringles and cracker related trademarks | North America
Indefinite-lived Intangible Assets [Line Items]
Other intangible assets excluding goodwill		1,700
Multipro
Indefinite-lived Intangible Assets [Line Items]
Goodwill		606
RXBAR
Indefinite-lived Intangible Assets [Line Items]
Goodwill		$ 373

Restructuring and Cost Reduct_3

Restructuring and Cost Reduction Activities Project K Total Expected Program Costs Narrative (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities cash implementation costs recovery time frame	3 years
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities cash implementation costs recovery time frame	5 years
Maximum | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 1,600
Estimated after-tax cash costs for the program amount	1,200
Maximum | Asset related costs | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	500
Maximum | Employee related cost | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	400
Maximum | Other cost | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 700

Restructuring and Cost Reduct_4

Restructuring and Cost Reduction Activities Project K Total Program Cost Percentage by Reportable Segment Narrative (Details) - Project K	12 Months Ended
	Dec. 28, 2019
North America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation	65.00%
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation	21.00%
Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation	4.00%
AMEA
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation	6.00%
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation	4.00%

Restructuring and Cost Reduct_5

Restructuring and Cost Reduction Activities Project K Total Program Costs Since Inception Narrative (Details) $ in Millions	Dec. 28, 2019USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	$ 1,633
Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	1,574
Project K | Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	6
Project K | Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	928
Project K | SGA
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	807
Project K | Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	$ (167)

Restructuring and Cost Reduct_6

Restructuring and Cost Reduction Activities Other Programs Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 113	$ 143	$ 263
SGA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	83	74	296
Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(5)	(30)	(148)
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges	47	3	40
Europe | Other programs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	40
Cash costs	50
Restructuring charges	38
Europe | Other programs | SGA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	43
Europe | Other programs | Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(5)
North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	50	$ 107	$ 345
North America | Other programs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	30
North America | Other programs | SGA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 21

Restructuring and Cost Reduct_7

Restructuring and Cost Reduction Activities Total Programs Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 113	$ 143	$ 263
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	35	99	115
SGA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	83	74	296
Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (5)	$ (30)	$ (148)

Restructuring and Cost Reduct_8

Restructuring and Cost Reduction Activities Schedule of Restructuring Programs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 113	$ 143	$ 263
Program cost to date	1,633
Employee related cost
Restructuring Cost and Reserve [Line Items]
Restructuring charges	49	63	177
Program cost to date	646
Pension curtailment (gain) loss, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(5)	(30)	(148)
Program cost to date	(172)
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	21	16	77
Program cost to date	306
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	14	0
Program cost to date	169
Other cost
Restructuring Cost and Reserve [Line Items]
Restructuring charges	48	80	157
Program cost to date	684
North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	50	107	345
Program cost to date	1,072
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges	47	3	40
Program cost to date	380
Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	15	15	9
Program cost to date	57
AMEA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3	11	11
Program cost to date	101
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2)	$ 7	$ (142)
Program cost to date	$ 23

Restructuring and Cost Reduct_9

Restructuring and Cost Reduction Activities Schedule of Restructuring Reserves Rollforward Narrative (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring and Related Activities [Abstract]
Project reserves	$ 62	$ 104	$ 160

Restructuring and Cost Reduc_10

Restructuring and Cost Reduction Activities Reserves Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Restructuring Reserve [Roll Forward]
Liability, beginning balance	$ 104	$ 160
Restructuring charge	113	143
Cash payments	(148)	(209)
Non-cash charges and other	(7)	10
Liability, ending balance	62	104
Employee related cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	93	97
Restructuring charge	49	63
Cash payments	(81)	(67)
Restructuring Reserve, Period Increase (Decrease)		0
Non-cash charges and other	0
Liability, ending balance	61	93
Pension curtailment (gain) loss, net
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	(5)	(30)
Cash payments	0	0
Restructuring Reserve, Period Increase (Decrease)		30
Non-cash charges and other	5
Liability, ending balance	0	0
Asset impairment
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	0	14
Cash payments	0	0
Non-cash charges and other	0	14
Liability, ending balance	0	0
Asset related costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance	1	0
Restructuring charge	21	16
Cash payments	(10)	(9)
Non-cash charges and other	(12)	(6)
Liability, ending balance	0	1
Other cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	10	63
Restructuring charge	48	80
Cash payments	(57)	(133)
Non-cash charges and other	0	0
Liability, ending balance	$ 1	$ 10

Equity Narrative (Details)

Equity Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Equity, Class of Treasury Stock [Line Items]
Direct Stock Purchase and Dividend Reinvestment Plan number of shares issued	less than one million	less than one million	less than one million
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	14	6.5	4.9
Shares issued to employees and directors under various benefit plans and stock purchase programs	15	8	7
Common stock repurchases (in shares)	4	5	7
Common stock repurchased	$ 220	$ 320	$ 516
2018 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	1,500
2020 share repurchase program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 1,500

Equity Changes in Comprehensive

Equity Changes in Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Equity [Abstract]
Net income	$ 977	$ 1,344	$ 1,254
Foreign currency translation adjustment before tax	100	5	(34)
Foreign currency translation adjustments tax (expense) benefit	(19)	(53)	113
Foreign currency translation adjustments after tax	81	(48)	79
Unrealized gain (loss) on cash flow hedges, pre-tax	5	3	0
Unrealized gain (loss) on cash flow hedges, tax (expense) benefit	(1)	(1)	0
Unrealized gain (loss) on cash flow hedges, after-tax	4	2	0
Reclassifications to net income, pre-tax	4	8	9
Reclassifications to net income, tax (expense) benefit	(1)	(2)	(3)
Reclassification to net income, after-tax	3	6	6
Net experience gain (loss)	(16)	(8)	44
Net experience gain (loss), tax (expense) benefit	5	1	(12)
Net experience gain (loss), after tax	(11)	(7)	32
Prior service credit (cost)	3	1	0
Prior service credit (cost), tax (expense) benefit	(1)	0	0
Prior service credit (cost), after-tax	2	1	0
Net experience (gain) loss, pre-tax	(5)	(5)	0
Net experience (gain) loss, tax (expense) benefit	1	1	0
Net experience loss, after-tax	(4)	(4)	0
Prior service (credit) cost, pre-tax	(1)	0	1
Prior service (credit) cost, tax (expense) benefit	0	0	0
Prior service cost, after-tax	(1)	0	1
Unrealized gain (loss) on available-for-sale securities, pre-tax	4	0	0
Unrealized gain (loss) on available-for-sale securities, tax (expense) benefit	0	0	0
Unrealized gain (loss) on available-for-sale securities, after-tax	4	0	0
Reclassification to net income on available-for-sale securities, pre-tax	(4)	0	0
Reclassification to net income on available-for-sale securities, tax (expense) benefit	0	0	0
Reclassification to net income on available-for-sale securities, after-tax	(4)	0	0
Other Comprehensive Income (Loss), before Tax	90	4	20
Other Comprehensive Income (Loss), Tax	(16)	(54)	98
Other Comprehensive Income (loss)	74	(50)	118
Comprehensive income	1,051	1,294	1,372
Net income (loss) attributable to noncontrolling interests	17	8	0
Other comprehensive income (loss) attributable to noncontrolling interests	0	(7)	0
Comprehensive income attributable to Kellogg Company	$ 1,034	$ 1,293	$ 1,372

Equity Reclassifications Out of

Equity Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ (9,197)	$ (8,821)	$ (8,155)
SGA	(2,980)	(3,020)	(3,312)
Interest expense	284	287	256
Net experience (gain) loss, pre-tax	(5)	(5)	0
Prior service cost	(1)	0	1
Other (income) expense	(188)	90	(526)
Total before tax	1,305	1,329	1,657
Tax (expense) benefit	(321)	(181)	(410)
Net income	977	1,344	1,254
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	(6)	2	7
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	4	8	9
Tax (expense) benefit	(1)	(2)	(3)
Net income	3	6	6
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	0	0	(1)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	4	8	10
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Net experience (gain) loss, pre-tax	(5)	(5)	0
Prior service cost	(1)	0	1
Total before tax	(6)	(5)	1
Tax (expense) benefit	1	1	0
Net income	(5)	(4)	1
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on available-for-sale securities
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	(4)	0	0
Tax (expense) benefit	0	0	0
Net income	(4)	0	0
Corporate bonds | Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on available-for-sale securities
Derivative Instruments, Gain (Loss) [Line Items]
Other (income) expense	$ (4)	$ 0	$ 0

Equity Summary of Accumulated O

Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Equity [Abstract]
Cash flow hedges — unrealized net gain (loss)	$ (60)	$ (53)
Foreign currency translation adjustments	(1,399)	(1,467)
Postretirement and postemployment benefits:
Net experience gain (loss)	7	23
Prior service credit (cost)	4	(3)
Total accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)	$ (1,448)	$ (1,500)

Leases and Other Commitments Na

Leases and Other Commitments Narrative (Details)	Dec. 28, 2019
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	12 years

Leases and Other Commitments Sc

Leases and Other Commitments Schedule of Supplemental Operating Lease Information Narrative (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 133

Leases and Other Commitments Su

Leases and Other Commitments Supplemental Operating Leases Information Table (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Leases [Abstract]
Operating lease, payments	$ 134
Right-of-use ssset obtained in exchange for operating lease liability	$ 164
Operating lease, weighted average remaining lease term	7 years
Operating lease, weighted average discount rate, percent	2.90%

Leases and Other Commitments Op

Leases and Other Commitments Operating Leases Future Maturities Table (Details) $ in Millions	Dec. 28, 2019USD ($)
Leases [Abstract]
Operating leases, 2020	$ 129
Operating leases, 2021	98
Operating leases, 2022	80
Operating leases, 2023	67
Operating leases, 2024	55
Operating leases, 2025 and beyond	181
Total minimum payments	610
Interest	(63)
Present value of lease liabilities	$ 547

Leases and Other Commitments _2

Leases and Other Commitments Operating Leases Future Maturities Table Narrative (Details) $ in Millions	Dec. 28, 2019USD ($)
Leases [Abstract]
Minimum lease payments for real-estate leases signed but not yet commenced	$ 18

Leases and Other Commitments _3

Leases and Other Commitments Operating Leases Future Minimum Annual Lease Commitments Table Details (Details) $ in Millions	Dec. 29, 2018USD ($)
Leases [Abstract]
Operating leases, future minimum payments due 2019	$ 121
Operating leases, future minimum payments due in 2020	97
Operating leases, future minimum payments, due in 2021	73
Operating leases, future minimum payments, due in 2022	57
Operating leases, future minimum payments, due in 2023	48
Operating leases, future minimum payments, due 2024 and beyond	129
Total minimum payments	$ 525

Leases and Other Commitments _4

Leases and Other Commitments Operating Leases Future Minimum Annual Lease Commitments Table Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Leases [Abstract]
Operating lease expense	$ 133	$ 195

Debt Narrative (Details)

Debt Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Jan. 31, 2020	Sep. 28, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,000
Multiemployer Plans, Withdrawal Obligation	156			$ 32
Line of Credit Facility, Remaining Borrowing Capacity	2,900
Principal repayments on long-term debt in 2020	620
Principal repayments on long-term debt in 2021	835
Principal repayments on long-term debt in 2022	1,039
Principal repayments on long-term debt in 2023	771
Principal repayments on long-term debt in 2024	677
Principal repayments on long-term debt in 2025 and beyond	3,896
Five Year Credit Agreement
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,500
Three Hundred Sixty Four Day Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,000	$ 1,000
Expired Three Hundred Sixty Four Day Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,000
Letter of Credit [Member] | Five Year Credit Agreement
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	75
Euro Commercial Paper [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 750
Debt Instrument, Term	364 days
Line of Credit Facility, Maximum Month-end Outstanding Amount	$ 0
European Swingline Loans [Member] | Five Year Credit Agreement
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	300
Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses
Debt Instrument [Line Items]
Multiemployer Plans, Withdrawal Obligation			$ 132
Maximum
Debt Instrument [Line Items]
Multiemployer Plans, Withdrawal Obligation	$ 250

Debt Components of Notes Payabl

Debt Components of Notes Payable (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Components of Notes Payable
Notes payable	$ 107	$ 176
U.S. Commercial Paper
Components of Notes Payable
Notes payable	$ 3	$ 15
Debt Instrument, Interest Rate, Effective Percentage	1.78%	2.75%
Europe Commerical Paper
Components of Notes Payable
Notes payable	$ 0	$ 0
Debt Instrument, Interest Rate, Effective Percentage	0.00%	0.00%
Bank Borrowings
Components of Notes Payable
Notes payable	$ 104	$ 161

Debt Schedule of Long-term Debt

Debt Schedule of Long-term Debt (Details) - USD ($) $ in Millions

Dec. 28, 2019

Sep. 28, 2019

Aug. 31, 2019

Dec. 29, 2018

May 31, 2018

Nov. 30, 2017

May 31, 2017

Nov. 30, 2016

May 31, 2016

Mar. 31, 2016

Mar. 31, 2015

May 31, 2014

Feb. 28, 2013

May 31, 2012

Dec. 31, 2010

Nov. 30, 2009

Mar. 31, 2001

Debt Instrument [Line Items]

Other long-term debt

$ 124

$ 9

Long-term debt, including current maturities of long-term debt

7,815

8,717

Current maturities of long-term debt

(620)

(510)

Long-term debt

7,195

8,207

4.5% U.S. Dollar Notes Due 2046

Debt Instrument [Line Items]

Notes payable

[1]

638

638

Debt instrument, stated interest rate

4.50%

7.45% U.S. Dollar Debentures Due 2031

Debt Instrument [Line Items]

Notes payable

[2]

621

621

Debt instrument, stated interest rate

7.45%

4.30% U.S. Dollar Notes Due 2028

Debt Instrument [Line Items]

Notes payable

[3]

595

595

Debt instrument, stated interest rate

4.30%

3.40% U.S. Dollar Notes Due 2027

Debt Instrument [Line Items]

Notes payable

[4]

596

595

Debt instrument, stated interest rate

3.40%

3.25% U.S. Dollar Notes Due 2026

Debt Instrument [Line Items]

Notes payable

[5]

741

731

Debt instrument, stated interest rate

3.25%

1.25% Euro Note Due 2025

Debt Instrument [Line Items]

Notes payable

[6]

689

693

Debt instrument, stated interest rate

1.25%

1.00% Euro Notes Due 2024

Debt Instrument [Line Items]

Notes payable

[7]

692

697

Debt instrument, stated interest rate

1.00%

2.65% U.S. Dollar Notes Due 2023

Debt Instrument [Line Items]

Notes payable

[8]

539

585

Debt instrument, stated interest rate

2.65%

2.65%

2.75% U.S. Dollar Note Due 2023

Debt Instrument [Line Items]

Notes payable

[9]

201

198

Debt instrument, stated interest rate

2.75%

3.125% U.S. Dollar Debentures Due 2022

Debt Instrument [Line Items]

Notes payable

[10]

353

351

Debt instrument, stated interest rate

3.125%

.80% Euro Notes Due 2022

Debt Instrument [Line Items]

Notes payable

[11]

669

684

Debt instrument, stated interest rate

0.80%

1.75% Euro Notes Due 2021

Debt Instrument [Line Items]

Notes payable

[12]

558

570

Debt instrument, stated interest rate

1.75%

3.25% U.S. Dollar Notes Due 2021

Debt Instrument [Line Items]

Notes payable

[13]

198

399

Debt instrument, stated interest rate

3.25%

3.25%

4.0% U.S. Dollar Notes Due 2020

Debt Instrument [Line Items]

Notes payable

[14]

601

848

Debt instrument, stated interest rate

4.00%

4.00%

4.15% U.S. Dollar Notes Due 2019

Debt Instrument [Line Items]

Notes payable

[15]

$ 0

$ 503

Debt instrument, stated interest rate

4.15%

4.15%

4.15%

3.25% U.S. Dollar Notes Due 2018

Debt Instrument [Line Items]

Debt instrument, stated interest rate

3.25%

[1]

In March 2016, the Company issued $650 million of thirty-year 4.50% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.59% at December 28, 2019.

[2]

In March 2001, the Company issued long-term debt instruments, primarily to finance the acquisition of Keebler Foods Company, of which $625 million of thirty-year 7.45% Debentures remain outstanding. The effective interest rate on the Debentures, reflecting issuance discount and hedge settlement, was 7.56% at December 28, 2019. The Debentures contain standard events of default and covenants, and can be redeemed in whole or in part by the Company at any time at prices determined under a formula (but not less than 100% of the principal amount plus unpaid interest to the redemption date).

[3]

In May 2018, the Company issued $600 million of ten-year 4.30% Senior Notes due 2028, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 4.34% at December 28, 2019.

[4]

In November 2017, the Company issued $600 million of ten-year 3.40% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of Chicago Bar Company LLC, the maker of RXBAR. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 3.49% at December 28, 2019.

[5]

In March 2016, the Company issued $750 million of ten-year 3.25% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of a portion of the Company's 7.45% U.S. Dollar Debentures due 2031 and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 4.11% at December 28, 2019 . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling $450 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $6 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes.

[6]

In March 2015, the Company issued €600 million (approximately $671 million at December 28, 2019 , which reflects the discount, fees and translation adjustments) of ten-year 1.25% Euro Notes due 2025, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 1.58% at December 28, 2019 . The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. In May 2017, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized gain of $20 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes.

[7]

In May 2016, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount, fees and translation adjustments) of eight-year 1.00% Euro Notes due 2024. The proceeds from these Notes were used for general corporate purposes, including, together with cash on hand and additional commercial paper borrowings, repayment of the Company's $750 million , seven-year 4.45% U.S. Dollar Notes due 2016 at maturity. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 0.21% at December 28, 2019 . In November 2016, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In October 2018, the Company entered into interest rate swaps with notional amounts totaling €300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. The Company subsequently terminated these swaps. In May of 2019, the Company entered into interest rate swaps with notional amounts totaling €600 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The fair value adjustment for the interest rate swaps was $3 million at December 28, 2019

[8]

In November 2016, the Company issued $600 million of seven-year 2.65% U.S. Dollar Notes, using the net proceeds for general corporate purposes, which included repayment of the Company's 1.875% U.S. Dollar Notes due 2016 at maturity and a portion of its commercial paper borrowings. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps was 3.39% at December 28, 2019 . In 2016, the Company entered into interest rate swaps with notional amounts totaling $300 million , which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $50 million of the Notes. In connection with the debt redemption, the Company incurred $2 million of interest expense, consisting primarily of a premium on the tender offer.

[9]

In February 2013, the Company issued $400 million ( $189 million previously redeemed) of ten-year 2.75% U.S. Dollar Notes, using net proceeds from these Notes for general corporate purposes, including, together with cash on hand, to repay a portion of the Company’s $750 million 4.25% U.S. Dollar Notes that matured in March 2013. The effective interest rate on these Notes, reflecting issuance discount hedge settlement and interest rate swaps, was 4.11% . In September 2016, the Company entered into interest rate swaps with notional amounts totaling $211 million , which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting unamortized loss of $9 million at December 28, 2019

[10]

In May 2012, the Company issued $700 million ( $342 million previously redeemed) of ten-year 3.125% U.S. Dollar Notes, using the net proceeds from these Notes for general corporate purposes, including financing a portion of the acquisition of Pringles. The effective interest rate on these Notes, reflecting issuance discount and interest rate swaps, was 3.74% at December 28, 2019 . During 2016 and 2018, the Company entered into interest rate swaps which effectively converted all or a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps, and the resulting $4 million loss at December 28, 2019

[11]

In May 2017, the Company issued €600 million (approximately $671 million USD at December 28, 2019 , which reflects the discount and translation adjustments) of five-year 0.80% Euro Notes due 2022, using the proceeds from these Notes for general corporate purposes, including, repayment of the Company's $400 million , five-year 1.75% U.S. Dollar Notes due 2017 at maturity. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 0.87% . The Notes were designated as a net investment hedge of the Company's investment in its Europe subsidiary when issued.

[12]

In May 2014, the Company issued €500 million (approximately $559 million at December 28, 2019 , which reflects the discount and translation adjustments) of seven-year 1.75% Euro Notes due 2021, using the proceeds from these Notes for general corporate purposes, which included repayment of a portion of the Company’s commercial paper borrowings. The effective interest rate on the Notes, reflecting issuance discount and hedge settlement, was 2.37% at December 28, 2019. The Notes were designated as a net investment hedge of the Company’s investment in its Europe subsidiary when issued.

[13]

In May 2018, the Company issued $400 million of three-year 3.25% Senior Notes due 2021, using the net proceeds for general corporate purposes, which included repayment of the Company's $400 million , seven-year 3.25% U.S. Dollar Notes due 2018 at maturity, and the repayment of a portion of the Company's commercial paper borrowings used to finance the acquisition of ownership interests in TAF and Multipro. The effective interest rate on the Notes, reflecting issuance discount, was 3.39% as December 28, 2019. In 2019, the Company redeemed $202 million of the Notes. In connection with the dept redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer.

[14]

In December 2010, the Company issued $1.0 billion ( $150 million previously redeemed) of ten-year 4.0% fixed rate U.S. Dollar Notes, using the net proceeds from these Notes for incremental pension and postretirement benefit plan contributions and to retire a portion of its commercial paper. The effective interest rate on these Notes, reflecting issuance discount, hedge settlement and interest rate swaps, was 3.37% at December 28, 2019 . During 2016, the Company entered into interest rate swaps, which effectively converted a portion of these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. The Company subsequently terminated the interest rate swaps and the resulting gain on termination at December 28, 2019 will be amortized to interest expense over the remaining term of the Notes. In 2019, the Company redeemed $248 million of the Notes. In connection with the debt redemption, the Company incurred $6 million of interest expense, consisting primarily of a premium on the tender offer, which was partially offset by accelerated gains on pre-issuance interest rate hedges.

[15]

In November 2009, the Company issued $500 million of ten-year 4.15% fixed rate U.S. Dollar Notes, using net proceeds from these Notes to retire a portion of its 6.6% U.S. Dollar Notes due 2011. In 2012 and 2015, the Company entered into interest rate swaps which effectively converted these Notes from a fixed rate to a floating rate obligation. These derivative instruments were designated as fair value hedges of the debt obligation. In 2019, the Company redeemed $191 million of the Notes. In connection with the August 2019 debt redemption, the Company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer. In September of 2019, the Company redeemed the remaining $309 million of the Notes. In connection with the September 2019 debt redemption, the company incurred $1 million of interest expense, consisting primarily of a premium on the tender offer.

Debt Long-term Debt Footnote A

Debt Long-term Debt Footnote A (Details) - USD ($) $ in Millions	Mar. 31, 2001	Mar. 31, 2016	Dec. 28, 2019
4.5% U.S. Dollar Notes Due 2046
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 650
Debt Instrument, Term		30 years
Debt instrument, stated interest rate		4.50%
Debt Instrument, Interest Rate, Effective Percentage			4.59%
7.45% U.S. Dollar Debentures Due 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 625
Debt Instrument, Term	30 years
Debt instrument, stated interest rate	7.45%
Debt Instrument, Interest Rate, Effective Percentage			7.56%

Debt Long-term Debt Footnote B

Debt Long-term Debt Footnote B (Details) - USD ($) $ in Millions	Mar. 31, 2001	Aug. 31, 2019	Mar. 31, 2016	Dec. 28, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Interest expense		$ 15		$ 284	$ 287
7.45% U.S. Dollar Debentures Due 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 625
Debt Instrument, Term	30 years
Debt instrument, stated interest rate	7.45%
Debt Instrument, Interest Rate, Effective Percentage				7.56%
Percentage of principal amount redeemed			100.00%

Debt Long-term Debt Footnote C

Debt Long-term Debt Footnote C (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2018	Dec. 28, 2019
4.30% U.S. Dollar Notes Due 2028
Debt Instrument [Line Items]
Debt Instrument, Term	10 years
Debt Instrument, Face Amount	$ 600
Debt instrument, stated interest rate	4.30%
3.25% U.S. Dollar Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument, Term	7 years
Debt Instrument, Face Amount	$ 400
Debt instrument, stated interest rate	3.25%
Debt Instrument, Interest Rate, Effective Percentage		4.34%

Debt Long-term Debt Footnote D

Debt Long-term Debt Footnote D (Details) - 3.40% U.S. Dollar Notes Due 2027 - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2017	Dec. 28, 2019
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600
Debt Instrument, Term	10 years
Debt instrument, stated interest rate	3.40%
Debt Instrument, Interest Rate, Effective Percentage		3.49%

Debt Long-term Debt Footnote E

Debt Long-term Debt Footnote E (Details) - USD ($) $ in Millions	Mar. 31, 2001	Mar. 31, 2016	Dec. 28, 2019	Dec. 29, 2018	Oct. 31, 2018	Sep. 30, 2016
Debt Instrument [Line Items]
Notional amounts of interest rate swaps			$ 6,563	$ 5,085
3.25% U.S. Dollar Notes Due 2026
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 750
Debt Instrument, Term		10 years
Debt instrument, stated interest rate		3.25%
Debt Instrument, Interest Rate, Effective Percentage			4.11%
Notional amounts of interest rate swaps					$ 450	$ 300
Unamortized gain (loss) on termination of interest rate swaps			$ (6)
7.45% U.S. Dollar Debentures Due 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 625
Debt Instrument, Term	30 years
Debt instrument, stated interest rate	7.45%
Debt Instrument, Interest Rate, Effective Percentage			7.56%

Debt Long-term Debt Footnote F

Debt Long-term Debt Footnote F (Details) € in Millions, $ in Millions	1 Months Ended
	Mar. 31, 2015EUR (€)	Dec. 28, 2019USD ($)	Dec. 29, 2018USD ($)	May 31, 2017EUR (€)
Debt Instrument [Line Items]
Notional amounts of interest rate swaps		$ 6,563	$ 5,085
1.25% Euro Note Due 2025
Debt Instrument [Line Items]
Debt Instrument, Face Amount	€ 600	$ 671
Debt Instrument, Term	10 years
Debt instrument, stated interest rate	1.25%
Debt Instrument, Interest Rate, Effective Percentage		1.58%
Notional amounts of interest rate swaps | €				€ 600
Unamortized gain (loss) on termination of interest rate swaps		$ 20

Debt Long-term Debt Footnote G

Debt Long-term Debt Footnote G (Details) € in Millions, $ in Millions	1 Months Ended		12 Months Ended
	May 31, 2016EUR (€)	May 31, 2009USD ($)	Dec. 28, 2019USD ($)	May 25, 2019EUR (€)	Dec. 29, 2018USD ($)	Oct. 31, 2018EUR (€)	Nov. 30, 2016EUR (€)
Debt Instrument [Line Items]
Notional amounts of interest rate swaps			$ 6,563		$ 5,085
1.00% Euro Notes Due 2024
Debt Instrument [Line Items]
Debt Instrument, Face Amount	€ 600		$ 671
Debt Instrument, Term	8 years
Debt instrument, stated interest rate	1.00%
Debt Instrument, Interest Rate, Effective Percentage			0.21%
Notional amounts of interest rate swaps | €				€ 600		€ 300	€ 300
Fair value adjustment for interest rate swaps			$ 3
4.45% U.S. Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 750
Debt Instrument, Term		7 years
Debt instrument, stated interest rate		4.45%

Debt Long-term Debt Footnote H

Debt Long-term Debt Footnote H (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2019	Nov. 30, 2016	Dec. 28, 2019	Dec. 29, 2018	Nov. 30, 2011
Debt Instrument [Line Items]
Notional amounts of interest rate swaps			$ 6,563	$ 5,085
Debt repurchase amount			1,000
Interest expense	$ 15		$ 284	$ 287
2.65% U.S. Dollar Notes Due 2023
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 600
Debt Instrument, Term		7 years
Debt instrument, stated interest rate	2.65%	2.65%
Debt Instrument, Interest Rate, Effective Percentage			3.39%
Notional amounts of interest rate swaps		$ 300
Unamortized gain (loss) on termination of interest rate swaps			$ (9)
Debt repurchase amount	$ 50
Interest expense	$ 2
1.875% U.S. Dollar Notes Due 2016
Debt Instrument [Line Items]
Debt instrument, stated interest rate					1.875%

Debt Long-term Debt Footnote I

Debt Long-term Debt Footnote I (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2019	Feb. 28, 2013	Dec. 28, 2019	Dec. 29, 2018	Sep. 30, 2016	Mar. 31, 2014
Debt Instrument [Line Items]
Debt repurchase amount			$ 1,000
Interest expense	$ 15		284	$ 287
Notional amounts of interest rate swaps			6,563	$ 5,085
2.75% U.S. Dollar Note Due 2023
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 400
Debt repurchase amount						$ 189
Debt Instrument, Term		10 years
Debt instrument, stated interest rate		2.75%
Debt Instrument, Interest Rate, Effective Percentage		4.11%
Notional amounts of interest rate swaps					$ 211
Unamortized gain (loss) on termination of interest rate swaps			$ (9)
4.25% U.S. Dollar Notes Due 2013
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 750
Debt instrument, stated interest rate		4.25%

Debt Long-term Debt Footnote J

Debt Long-term Debt Footnote J (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2019	May 31, 2012	Dec. 28, 2019	Dec. 29, 2018	Mar. 31, 2014
Debt Instrument [Line Items]
Interest expense	$ 15		$ 284	$ 287
Debt repurchase amount			1,000
Notional amounts of interest rate swaps			$ 6,563	$ 5,085
3.125% U.S. Dollar Debentures Due 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 700
Debt repurchase amount					$ 342
Debt Instrument, Term		10 years
Debt instrument, stated interest rate		3.125%
Debt Instrument, Interest Rate, Effective Percentage			3.74%
Unamortized gain (loss) on termination of interest rate swaps			$ (4)

Debt Long-term Debt Footnote K

Debt Long-term Debt Footnote K (Details) € in Millions, $ in Millions	1 Months Ended
	May 31, 2017USD ($)	Dec. 28, 2019USD ($)	May 31, 2017EUR (€)
.80% Euro Notes Due 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 671	€ 600
Debt Instrument, Term	5 years
Debt instrument, stated interest rate	0.80%		0.80%
Debt Instrument, Interest Rate, Effective Percentage	0.87%		0.87%
1.75% U.S. Dollar Notes Due 2017
Debt Instrument [Line Items]
Debt Instrument, Term	5 years
Debt instrument, stated interest rate	1.75%		1.75%
Debt Instrument, Repurchased Face Amount	$ 400

Debt Long-term Debt Footnote L

Debt Long-term Debt Footnote L (Details) - 1.75% Euro Notes Due 2021 € in Millions, $ in Millions	1 Months Ended
	May 31, 2014EUR (€)	Dec. 28, 2019USD ($)
Debt Instrument [Line Items]
Debt Instrument, Face Amount	€ 500	$ 559
Debt Instrument, Term	7 years
Debt instrument, stated interest rate	1.75%
Debt Instrument, Interest Rate, Effective Percentage		2.37%

Debt Long-term Debt Footnote M

Debt Long-term Debt Footnote M (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2019	May 31, 2018	Dec. 28, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Debt repurchase amount			$ 1,000
Interest expense	$ 15		$ 284	$ 287
3.25% U.S. Dollar Notes Due 2021
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 400
Debt Instrument, Term		3 years
Debt instrument, stated interest rate	3.25%	3.25%
Debt Instrument, Interest Rate, Effective Percentage			3.39%
Debt repurchase amount	$ 202
Interest expense	$ 6
3.25% U.S. Dollar Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 400
Debt Instrument, Term		7 years
Debt instrument, stated interest rate		3.25%
Debt Instrument, Interest Rate, Effective Percentage			4.34%

Debt Long-term Debt Footnote N

Debt Long-term Debt Footnote N (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2019	Dec. 31, 2010	Dec. 28, 2019	Dec. 29, 2018	Mar. 31, 2014
Debt Instrument [Line Items]
Debt repurchase amount			$ 1,000
Interest expense	$ 15		284	$ 287
Notional amounts of interest rate swaps			$ 6,563	$ 5,085
4.0% U.S. Dollar Notes Due 2020
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 1,000
Debt Instrument, Term		10 years
Debt instrument, stated interest rate	4.00%	4.00%
Debt Instrument, Interest Rate, Effective Percentage			3.37%
Debt repurchase amount	$ 248				$ 150
Interest expense	$ 6

Debt Long-term Debt Footnote O

Debt Long-term Debt Footnote O (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended	12 Months Ended
	Aug. 31, 2019	Nov. 30, 2009	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Debt repurchase amount				$ 1,000
Interest expense	$ 15			$ 284	$ 287
4.15% U.S. Dollar Notes Due 2019
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500
Debt Instrument, Term		10 years
Debt instrument, stated interest rate	4.15%	4.15%	4.15%
Debt repurchase amount	$ 191		$ 309
Interest expense	$ 1		$ 1
6.6% U.S. Dollar Notes Due 2011
Debt Instrument [Line Items]
Debt instrument, stated interest rate		6.60%

Debt 2019 Debt Redemption (Deta

Debt 2019 Debt Redemption (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2019	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018	May 31, 2018	Nov. 30, 2016	Mar. 31, 2014	Dec. 31, 2010	Nov. 30, 2009
Debt Instrument [Line Items]
Interest expense	$ 15		$ 284	$ 287
Debt repurchase amount			$ 1,000
4.15% U.S. Dollar Notes Due 2019
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.15%	4.15%							4.15%
Interest expense	$ 1	$ 1
Debt repurchase amount	$ 191	$ 309
4.0% U.S. Dollar Notes Due 2020
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.00%							4.00%
Interest expense	$ 6
Debt repurchase amount	$ 248						$ 150
3.25% U.S. Dollar Notes Due 2021
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.25%				3.25%
Interest expense	$ 6
Debt repurchase amount	$ 202
2.65% U.S. Dollar Notes Due 2023
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.65%					2.65%
Interest expense	$ 2
Debt repurchase amount	$ 50

Debt Standby Letters of Credit

Debt Standby Letters of Credit (Details) - Standby Letters of Credit $ in Millions	Dec. 28, 2019USD ($)
Financial Support for Nonconsolidated Legal Entity [Line Items]
Letters of Credit outstanding amount	$ 87
Secured
Financial Support for Nonconsolidated Legal Entity [Line Items]
Letters of Credit outstanding amount	52
Unsecured
Financial Support for Nonconsolidated Legal Entity [Line Items]
Letters of Credit outstanding amount	$ 35

Stock Compensation Equity based

Stock Compensation Equity based compensation programs (Details)	12 Months Ended
	Dec. 28, 2019shares
2017 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized, but unissued	16,000,000
Vesting period, years	3 years
Options granted remaining authorized, but unissued, shares	17,000,000
Contractual term, years	10 years
Shares, Issued	2
Shares Reduced From Remaining Available	1
Shares Reduced From Outstanding Award	1
2013 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years	3 years
Contractual term, years	10 years
International Subsidiary Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%

Stock Compensation Schedule of

Stock Compensation Schedule of Compensation Expense for Equity Programs and Related Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Payment Arrangement [Abstract]
Pre-tax compensation expense	$ 61	$ 64	$ 71
Related income tax benefit	16	$ 16	$ 26
Non-vested stock-based compensation awards not yet recognized	$ 87
Weighted-average period of recognition, years	2 years

Stock Compensation Cash used to

Stock Compensation Cash used to settle equity instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Payment Arrangement [Abstract]
Total cash received from option exercises and similar instruments	$ 64	$ 167	$ 97
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ (2)	$ 11	$ 4

Stock Compensation Fair Value A

Stock Compensation Fair Value Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Payment Arrangement [Abstract]
Weighted-average expected volatility	18.00%	18.00%	18.00%
Weighted-average expected term (years)	6 years 7 months 6 days	6 years 7 months 6 days	6 years 7 months 6 days
Weighted-average risk-free interest rate	2.59%	2.82%	2.26%
Dividend yield	3.90%	3.00%	2.80%
Weighted-average fair value of options granted	$ 6.78	$ 10	$ 10.14

Stock Compensation Summary of S

Stock Compensation Summary of Share-based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Payment Arrangement [Abstract]
Outstanding, beginning of period - shares	14	14	15
Granted - shares	3	3	2
Exercised - shares	(1)	(2)	(2)
Forfeitures and expirations - shares	(2)	(1)	(1)
Outstanding, end of period - shares	14	14	14
Exerciseable, end of period - shares	10	10	10
Outstanding, beginning of period - weighted-average exercise price	$ 66	$ 64	$ 62
Granted - weighted-average exercise price	57	70	73
Exercised - weighted-average exercise price	56	58	57
Forfeitures and expirations - weighted-average exercise price	67	71	70
Outstanding, end of period - weighted-average exercise price	65	66	64
Exercisable, end of period - weighted-average exercise price	$ 65	$ 63	$ 60
Outstanding, end of period - weighted-average remaining contractual term (years)	4 years 10 months 24 days
Excerciseable, end of period - weighted-average remaining contractual term (years)	6 years 1 month 6 days
Outstanding, end of period - aggregate intrinsic value	$ 55
Exerciseable, end of period - aggregate intrinsic value	86
Total intrinsic value of options exercised	$ 7	$ 33	$ 22

Stock Compensation Maximum Futu

Stock Compensation Maximum Future Value of Performance Shares (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 28, 2019	Mar. 30, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 28, 2019
2019 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum future value					$ 31
2018 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum future value					20
2017 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum future value					$ 13
2019 Performance share award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Shares Issued On Vesting Date Minimum		0.00%
Performance Shares Issued On Vesting Date Maximum		200.00%
Vesting period, years		3 years
Performance Award Condition Time Period		3 years
Non-vested, beginning of year - weighted-average grant date fair value					$ 59
Performance Share Target Grant					223,000
2018 Performance share award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Shares Issued On Vesting Date Minimum			0.00%
Performance Shares Issued On Vesting Date Maximum			200.00%
Vesting period, years			3 years
Performance Award Condition Time Period			3 years
Non-vested, beginning of year - weighted-average grant date fair value			$ 88
Performance Share Target Grant			143,000
2017 Performance share award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Shares Issued On Vesting Date Minimum				0.00%
Performance Shares Issued On Vesting Date Maximum				200.00%
Vesting period, years				3 years
Performance Award Condition Time Period				3 years
Non-vested, beginning of year - weighted-average grant date fair value				$ 50
Performance Share Target Grant				100,000
2016 Performance share award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016 Performance share award settlement in terms of original target	88.00%
2016 Performance share award settlement in dollars	$ 7

Stock Compensation Summary of r

Stock Compensation Summary of restricted stock activity (Details) - Restricted Stock and Restricted Stock Units - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, beginning of year - shares	1,708	1,673	1,166
Granted - shares	287	772	776
Vested - shares	(469)	(507)	(109)
Forfeited - shares	(340)	(230)	(160)
Non-vested, end of year - shares	1,186	1,708	1,673
Non-vested, beginning of year - weighted-average grant-date fair value	$ 65	$ 65	$ 63
Granted - weighted average grant-date fair value	55	63	65
Vested - weighted-average grant-date fair value	68	59	58
Forfeited - weighted-average grant-date fair value	62	64	65
Non-vested, end of year - weighted-average grant-date fair value	$ 61	$ 65	$ 65
Total fair value of restricted stock and restricted stock units vested during period	$ 27	$ 35	$ 5

Pension Benefits Pension Benefi

Pension Benefits Pension Benefits Narrative (Details) - Pension - United States - USD ($) $ in Millions	Jul. 28, 2019	Dec. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Payment for Settlement		$ 174
Curtailment gain	$ 11

Pension Benefits Change in Proj

Pension Benefits Change in Projected Benefit Obligations, Plan Assets, and Funding Status (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Jan. 31, 2019	Sep. 30, 2017	Sep. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Amounts Recognized in Balance Sheet
Other Assets				$ 241	$ 228
Other liabilities				(705)	(651)
Minimum
Amounts Recognized in Balance Sheet
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	3.00%
Maximum
Amounts Recognized in Balance Sheet
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	7.00%
Europe | Project K | Pension
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain			$ 30
Global plans | Pension
Change in Benefit Obligation [Roll Forward]
Beginning of Year				5,117	5,648
Service Cost				36	87
Interest Cost				172	165
Plan participants' contributions				1	1
Plan Amendments				3	6
Actuarial (gain) loss				766	(384)
Benefits paid				(458)	(280)
Curtailments and special termination benefits				(13)	(36)
Other				0	1
Foreign Currency Adjustments				30	(91)
End of Year				5,654	5,117
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value, Beginning of Year				4,677	5,043
Actual Return on Plan Assets				874	(299)
Employer Contributions				10	270
Plan participants' contributions				1	1
Benefits Paid, Plan Assets				(426)	(236)
Other				0	(1)
Foreign Currency Adjustments				34	(101)
Fair Value, End of Year				5,170	4,677
Funded Status				(484)	(440)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost				37	41
Net Amount Recognized				37	41
Amounts Recognized in Balance Sheet
Other Assets				241	228
Other Current Liabilities				(20)	(17)
Other liabilities				(705)	(651)
Net Amount Recognized				(484)	(440)
Defined Benefit Plan, Accumulated Benefit Obligation				$ 5,600	$ 5,000
United States and Canada | Project K
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain		$ 136

Pension Benefits Accumulated Be

Pension Benefits Accumulated Benefit Obligations (Details) - Global plans - Pension - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	$ 4,061	$ 3,725
Accumulated benefit obligation	4,033	3,689
Fair value of plan assets	$ 3,362	$ 3,081

Pension Benefits Components of

Pension Benefits Components of Pension Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Pension
Defined Benefit Plan Disclosure [Line Items]
Pension (income) expense	$ 117	$ 165	$ (255)
Global plans
Defined Benefit Plan Disclosure [Line Items]
401(k) expense	39	38	41
Global plans | Pension
Defined Benefit Plan Disclosure [Line Items]
Service Cost	36	87
Interest Cost	172	165
Net periodic benefit cost	110	168	(138)
Curtailment and special termination benefits	(13)	(30)	(151)
Pension (income) expense	97	138	(289)
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	7
Global plans | COGS and SGA | Pension
Defined Benefit Plan Disclosure [Line Items]
Service Cost	36	87	96
Global plans | OIE | Pension
Defined Benefit Plan Disclosure [Line Items]
Interest Cost	172	165	164
Expected Return on Plan Assets	(340)	(361)	(371)
Amortization of Unrecognized Prior Service Cost (Credit)	7	8	9
Recognized net (gain) loss	235	269	(36)
Foreign and U.S. multiemployer defined contribution plan | Pension
Defined Benefit Plan Disclosure [Line Items]
Pension (income) expense	$ 20	$ 27	$ 34

Pension Benefits Assumptions (D

Pension Benefits Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Pension
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation	2.90%	3.90%	3.30%
Long-term rate of compensation increase	3.40%	3.80%	3.90%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected rates of return	25th
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected rates of return	75th
Global Plans [Member] | Pension
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	3.70%	3.30%	3.60%
Long-term rate of compensation increase	4.00%	3.90%	3.90%
Long-term rate of return on plan assets	7.30%	7.40%	8.10%
Defined Benefit Plan, Benefit Obligation	$ 5,654	$ 5,117	$ 5,648
United States | Pension
Defined Benefit Plan Disclosure [Line Items]
Percentage of consolidated pension and postretirement benefit plan assets	72.00%
Long-term inflation assumption	2.50%
Active management premium	0.80%
Expected rate of return on foreign plan assets	7.00%
Expected rates of return	54th percentile
Mortality rate | Pension
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 77

Pension Benefits Plan Assets (D

Pension Benefits Plan Assets (Details) - Global plans - Pension - USD ($) $ in Millions		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 5,170	$ 4,677	$ 5,043
Net Asset Value Excluded From Fair Value By Input	[1]	2,615	2,850
Expected contribution by Company		7
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		368	497
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2,187	1,330
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		14	75
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Cash and Cash Equivalents | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		14	75
Cash and Cash Equivalents | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Cash and Cash Equivalents | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Domestic Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		338	412
Net Asset Value Excluded From Fair Value By Input	[1]	$ 0	$ 0
Percentage of consolidated plan assets represented by investment in Company comon stock		1.20%	1.00%
Domestic Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 338	$ 412
Domestic Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Domestic Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Foreign Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		16	11
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Foreign Corporate Common Stock | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		16	10
Foreign Corporate Common Stock | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	1
Foreign Corporate Common Stock | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Mutual Fund International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		36	41
Net Asset Value Excluded From Fair Value By Input	[1]	36	34
Mutual Fund International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Mutual Fund International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	7
Mutual Fund International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Mutual Funds Domestic Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4	53
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Mutual Funds Domestic Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Mutual Funds Domestic Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4	53
Mutual Funds Domestic Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		498	437
Net Asset Value Excluded From Fair Value By Input	[1]	498	437
Collective Trusts Domestic Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts Domestic Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts Domestic Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		933	1,422
Net Asset Value Excluded From Fair Value By Input	[1]	816	1,330
Collective Trusts International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		117	92
Collective Trusts International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts Other International Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1,096	331
Net Asset Value Excluded From Fair Value By Input	[1]	378	331
Collective Trusts Other International Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Collective Trusts Other International Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		718	0
Collective Trusts Other International Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Limited Partnership
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		228	283
Net Asset Value Excluded From Fair Value By Input	[1]	228	283
Limited Partnership | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Limited Partnership | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Limited Partnership | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, corporate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		654	498
Net Asset Value Excluded From Fair Value By Input	[1]	211	0
Bonds, corporate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, corporate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		443	498
Bonds, corporate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, government
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		774	562
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Bonds, government | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, government | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		774	562
Bonds, government | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, other
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		70	62
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Bonds, other | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Bonds, other | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		70	62
Bonds, other | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		412	378
Net Asset Value Excluded From Fair Value By Input	[1]	412	378
Real estate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Real estate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Real estate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		97	112
Net Asset Value Excluded From Fair Value By Input	[1]	36	57
Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		61	55
Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 0	$ 0
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		31.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		42.00%
Real Estate And Other
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		27.00%
[1]	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.

Pension Benefits Benefit Paymen

Pension Benefits Benefit Payments (Details) - Global plans - Pension $ in Millions	Dec. 28, 2019USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit payments in 2020	$ 274
Benefit payments in 2021	273
Benefit payments in 2022	281
Benefit payments in 2023	285
Benefit payments in 2024	294
Benefit payments in 2025 through 2029	$ 1,508

Nonpension Postretirement and_3

Nonpension Postretirement and Postemployment Benefits Change in Projected Benefit Obligations, Plan Assets, and Funded Status, Postretirement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Amounts Recognized in Balance Sheet
Other Assets	$ 241	$ 228
Other Liabilities	(33)	(34)
U.S. and Canada | Nonpension postretirement
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Beginning of Year	1,069	1,190
Service Cost	15	18	$ 18
Interest Cost	37	36	37
Actuarial (gain) loss	59	(105)
Benefits paid	(60)	(67)
Curtailments and special termination benefits	(6)	0
Plan Amendments	0	0
Foreign Currency Adjustments	2	(3)
End of Year	1,116	1,069	1,190
Change in plan assets
Fair Value, Beginning of Year	1,140	1,292
Actual Return on Plan Assets	282	(91)
Employer Contributions	18	17
Benefits Paid, Plan Assets	(76)	(78)
Fair Value, End of Year	1,364	1,140	$ 1,292
Funded Status	248	71
Amounts Recognized in Balance Sheet
Other Assets	283	107
Other Current Liabilities	(2)	(2)
Other Liabilities	(33)	(34)
Net Amount Recognized	248	71
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	(59)	(68)
Net Amount Recognized	$ (59)	$ (68)

Nonpension Postretirement and_4

Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension postretirement - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ (175)	$ 43	$ (123)
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	9
U.S. and Canada defined benefit plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	15	18	18
Interest Cost	37	36	37
Expected Return on Plan Assets	(86)	(94)	(98)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(9)	(9)
Recognized net (gain) loss	(137)	81	(90)
Net periodic benefit cost	(180)	32	(142)
Curtailment and special termination benefits	(6)	0	3
Postretirement Benefit Expense	(186)	32	(139)
U.S. and Canada defined contribution plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 11	$ 11	$ 16

Nonpension Postretirement and_5

Nonpension Postretirement and Postemployment Benefits Assumptions (Details) - Nonpension postretirement	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligation	3.30%	4.30%	3.60%
U.S. and Canada
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, annual net periodic cost	4.00%	3.60%	4.00%
Long-term rate of return on plan assets	7.30%	7.50%	8.50%

Nonpension Postretirement and_6

Nonpension Postretirement and Postemployment Benefits Health Care Cost Trend Rates (Details) - Nonpension postretirement $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assumed healthcare cost trend rate for 2019	5.25%
Annual change in assumed healthcare cost trend rate	0.25%
Assumed health care cost trend rate by 2023	4.50%
U.S. and Canada
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effiect on total service and interest cost components, one percentage point increase	$ 3
Effect on postretirement benefit obligation, one percentage point increase	77
Effect on total service and interest cost components, one percentage point decrease	(2)
Effect on postretirement benefit obligation, one percentage point decrease	$ (66)

Nonpension Postretirement and_7

Nonpension Postretirement and Postemployment Benefits Plan Assets (Details) - U.S. and Canada - Nonpension postretirement - USD ($) $ in Millions		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 1,364	$ 1,140	$ 1,292
Net Asset Value Excluded From Fair Value By Input	[1]	791	791
Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		261	115
Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		312	234
Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	3
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Cash and Cash Equivalents | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		8	2
Cash and Cash Equivalents | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	1
Cash and Cash Equivalents | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Domestic Corporate Common Stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		242	108
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Domestic Corporate Common Stock | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		242	108
Domestic Corporate Common Stock | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Domestic Corporate Common Stock | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Foreign Corporate Common Stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	6
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Foreign Corporate Common Stock | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	5
Foreign Corporate Common Stock | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	1
Foreign Corporate Common Stock | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Funds Domestic Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		35	37
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Mutual Funds Domestic Equity | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Funds Domestic Equity | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		35	37
Mutual Funds Domestic Equity | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Fund International Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Mutual Fund International Equity | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Fund International Equity | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Fund International Equity | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Funds Domestic Debt
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		53	42
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Mutual Funds Domestic Debt | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Mutual Funds Domestic Debt | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		53	42
Mutual Funds Domestic Debt | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts Domestic Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		286	281
Net Asset Value Excluded From Fair Value By Input	[1]	286	281
Collective Trusts Domestic Equity | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts Domestic Equity | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts Domestic Equity | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts International Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		293	228
Net Asset Value Excluded From Fair Value By Input	[1]	293	228
Collective Trusts International Equity | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts International Equity | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Collective Trusts International Equity | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Limited Partnership
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		124	199
Net Asset Value Excluded From Fair Value By Input	[1]	124	199
Limited Partnership | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Limited Partnership | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Limited Partnership | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, corporate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		136	95
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Bonds, corporate | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, corporate | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		136	95
Bonds, corporate | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, government
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		77	50
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Bonds, government | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, government | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		77	50
Bonds, government | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	90
Net Asset Value Excluded From Fair Value By Input	[1]	0	83
Bonds, other | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Bonds, other | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	7
Bonds, other | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Real Estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		88
Net Asset Value Excluded From Fair Value By Input	[1]	88
Real Estate | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0
Real Estate | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0
Real Estate | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0
Other [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	1
Net Asset Value Excluded From Fair Value By Input	[1]	0	0
Other [Member] | Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other [Member] | Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	1
Other [Member] | Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	$ 0
[1]	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.

Nonpension Postretirement and_8

Nonpension Postretirement and Postemployment Benefits VEBA Trusts (Details) - U.S. and Canada $ in Millions	Dec. 28, 2019USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contribution by Company	$ 19
Nonpension postretirement | Debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average target asset allocation	24.00%
Nonpension postretirement | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average target asset allocation	67.00%
Nonpension postretirement | Real Estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average target asset allocation	9.00%

Nonpension Postretirement and_9

Nonpension Postretirement and Postemployment Benefits Change in Projected Benefit Obligations, Plan Assets, and Funded Status, Postemployment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Other Assets	$ 241	$ 228
Amounts Recognized in Balance Sheet
Other Liabilities	(33)	(34)
Postemployment
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Beginning of Year	42	43
Service Cost	3	3
Interest Cost	2	1
Actuarial (gain) loss	8	3
Benefits paid	(7)	(8)
Plan Amendments	0	0
Foreign Currency Adjustments	0	0
End of Year	48	42
Funded Status	(48)	(42)
Amounts Recognized in Balance Sheet
Other Current Liabilities	(7)	(5)
Other Liabilities	(41)	(37)
Net Amount Recognized	(48)	(42)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	3	4
Net experience loss	(22)	(38)
Net Amount Recognized	$ (19)	$ (34)

Nonpension Postretirement an_10

Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense, Postemployment (Details) - Postemployment - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 3	$ 3
Interest Cost	2	1
Global plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Change in incidence rate assumption	7
Service Cost	3	3	$ 6
Interest Cost	2	1	3
Amortization of Unrecognized Prior Service Cost (Credit)	1	1	1
Recognized net (gain) loss	(5)	(5)	0
Net periodic benefit cost	1	0	10
Settlement cost	(3)	0	0
Postemployment Benefits, Period Expense	(2)	$ 0	$ 10
Estimated net prior service cost for defined benefit pension plans, expected to be amortized	3
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 1

Nonpension Postretirement an_11

Nonpension Postretirement and Postemployment Benefits Benefit Payments (Details) $ in Millions	Dec. 28, 2019USD ($)
U.S. and Canada | Nonpension postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit payments in 2020	$ 66
Benefit payments in 2021	67
Benefit payments in 2022	67
Benefit payments in 2023	68
Benefit payments in 2024	68
Benefit payments in 2025 through 2029	337
Global plans | Postemployment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit payments in 2020	8
Benefit payments in 2021	6
Benefit payments in 2022	5
Benefit payments in 2023	5
Benefit payments in 2024	5
Benefit payments in 2025 through 2029	$ 20

Multipemployer Pension and Po_3

Multipemployer Pension and Postretirement Plans Narrative (Details)	12 Months Ended
	Dec. 28, 2019
Minimum
Multiemployer Plans [Line Items]
Red Zone Multiemployer Plans Funded Percentage	0.00%
Yellow Zone Multiemployer Plans Funded Percentage	65.00%
Green Zone Multiemployer Plan Funded Percentage	80.00%
Maximum
Multiemployer Plans [Line Items]
Red Zone Multiemployer Plans Funded Percentage	65.00%
Yellow Zone Multiemployer Plans Funded Percentage	80.00%
Green Zone Multiemployer Plan Funded Percentage	100.00%

Multipemployer Pension and Po_4

Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Trusts Funds (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Multiemployer Plans [Line Items]
Entity Tax Identification Number		38-0710690
Multiemployer Plan, Contributions by Employer		$ 8.7	$ 10.4	$ 15.9
Bakery And Confectionary Union And Industry International Pension Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Employer's Participants		80.00%
Entity Tax Identification Number	[1]	52-6118572
Multiemployer Plan Number	[1]	001
Multiemployer Plans, Certified Zone Status [Fixed List]	[1]	Red	Red
Multiemployer Plans, Certified Zone Status, Date	[1]	Dec. 31, 2019	Dec. 31, 2018
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, First	[1],[2]	Dec. 17, 2020
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Last	[1],[2]	Mar. 16, 2021
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	[1],[2]	Mar. 16, 2021
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan [Fixed List]	[1]	Implemented
Multiemployer Plan, Contributions by Employer	[1]	$ 5.9	$ 6.5	6.6
Multiemployer Plans, Surcharge [Fixed List]	[1]	Yes
Central States Southeast And Southwest Areas Pension Fund [Member]
Multiemployer Plans [Line Items]
Entity Tax Identification Number		36-6044243
Multiemployer Plan Number		001
Multiemployer Plans, Certified Zone Status [Fixed List]		Red	Red
Multiemployer Plans, Certified Zone Status, Date		Dec. 31, 2019	Dec. 31, 2018
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, First
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Last
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	[3]
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan [Fixed List]		Implemented
Multiemployer Plan, Contributions by Employer		$ 1.3	$ 1.9	4.8
Multiemployer Plans, Surcharge [Fixed List]		Yes
Western Conference Of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Entity Tax Identification Number		91-6145047
Multiemployer Plan Number		001
Multiemployer Plans, Certified Zone Status [Fixed List]		Green	Green
Multiemployer Plans, Certified Zone Status, Date		Dec. 31, 2019	Dec. 31, 2018
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, First
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Last
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	[4]	Mar. 26, 2022
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan [Fixed List]		NA
Multiemployer Plan, Contributions by Employer		$ 0.8	$ 1	1.4
Multiemployer Plans, Surcharge [Fixed List]		No
Other Plans [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	[5]
Multiemployer Plan, Contributions by Employer		$ 0.7	$ 1	$ 3.1
[1]	The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 80 percent of the Company’s participants in this fund are covered by a single CBA that expires on 3/16/2021.
[2]	During 2017, the Company terminated certain CBAs covered by these funds. Because of the Company's level of continuing involvement in each fund, the Company does not anticipate being subject to a withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019.
[3]	During 2019, the Company terminated CBAs covered by this fund. As a result, the Company has withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect to make 2020 contributions.
[4]	During 2017, the Company terminated certain CBAs covered by this fund. As a result, the Company has partially withdrawn from the fund and recognized expense for its estimated withdrawal liability. The Company does not expect 2020 contributions to be materially different than 2019.
[5]	During 2017 and 2019, the Company terminated the CBAs covered by certain of these funds. As a result, for the impacted funds, the Company recognized expense for the estimated withdrawal liability in each year and no longer made contributions following the termination. The Company does not expect 2020 contributions to the remaining funds to be materially different from 2019.

Multipemployer Pension and Po_5

Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Trusts Funds Contributions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Multiemployer Plans [Line Items]
Collective-Bargaining Arrangement, percentage of total contributions	5.00%
Multiemployer withdrawal obligation annual cash obligation	$ 8
Multiemployer Plans, Withdrawal Obligation	$ 156	$ 32
Multiemployer plan withdrawal obligation term	20 years
Multiemployer withdrawal liability payments	$ 8	3
Project K
Multiemployer Plans [Line Items]
Multiemployer plan withdrawal expense	$ 132	$ 7	$ 26

Multipemployer Pension and Po_6

Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Curtailments, Settlements and Termination Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plan, Contributions by Employer	$ 8.7	$ 10.4	$ 15.9
Multiemployer Plans, Postretirement Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plan, Contributions by Employer	$ 11	$ 11	$ 16

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Operating Loss Carryforwards [Line Items]
Effective income tax rate			24.60%	13.60%	24.80%
Out-of-period adjustment - increase tax expense decrease deferred tax asset			$ 39
U.S. Federal Corporate Tax Rate Prior to Tax Cuts and Jobs Act of 2017				35.00%
U.S. Federal Corporate Tax Rate after Tax Cuts and Jobs Act of 2017				21.00%
Year end tax provision net of reduction in U.S. Corporate tax rate and transition tax				$ 8
Tax benefit from U.S. corporate tax rate reduction	$ (11)		(11)	(11)
Transition tax estimate		$ (16)
Discrete tax expense related to changes in our reinvestment assertion			5
Remeasurement of deferred taxes Tax Cuts Jobs Act of 2017					$ 149
Transition tax liability on accumulated foreign earnings	94	$ (16)	94	157
Tax reserves for transition tax on foreign earnings	47		47	47
Pension contributions			28	287	44
Discrete tax benefit remeasurement of deferred taxes following a legal entity restructuring				44
Undistributed earnings of foreign subsidiaries	800		800	2,400
Amount of unrecognized deferred tax liability on undistributed earnings of foreign subsidiaries	20		20
Accumulated foreign earnings considered permanently reinvested				2,600
Deferred Tax Benefit Resulting From Intercompany Transfer Of Intellectual Property					39
Tax benefits of carryforwards	279		279	270
Valuation allowance	146		146	166
Income taxes paid	$ 255		$ 537	188	$ 352
U.S percentage of tax provision	70.00%		70.00%
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 44		$ 44
Projected additions to unrecognized tax benefits related to ongoing intercompany pricing activity			5
Unrecognized tax benefits that would affect the Company's effective tax rate in future periods	81		81
Deferred Tax Liabilities, Gross	749		749	852
Deferred tax liabilities	364		364	484
Discretionary pension contribution
Operating Loss Carryforwards [Line Items]
Pension contributions				$ 250
Current liabilities
Operating Loss Carryforwards [Line Items]
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 19		$ 19

Income Taxes Income before inco

Income Taxes Income before income taxes and the provision for U.S. federal, state and foreign taxes on earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Income before income taxes, United States	$ 938	$ 851	$ 1,097
Income before income taxes, Foreign	367	478	560
Income before income taxes	1,305	1,329	1,657
Income taxes, currently payable, Federal	345	7	358
Income taxes, currently payable, State	52	28	31
Income taxes, currently payable, Foreign	77	99	79
Income taxes, currently payable	474	134	468
Income taxes, deferred, Federal	(124)	109	(41)
Income taxes, deferred, State	(29)	(59)	8
Income taxes, deferred, Foreign	0	(3)	(25)
Income taxes, deferred	(153)	47	(58)
Total income taxes	$ 321	$ 181	$ 410

Income Taxes Difference Between

Income Taxes Difference Between U.S. Federal Statutory Tax Rate and the Company's Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
U.S. statutory income tax rate	21.00%	21.00%	35.00%
Foreign rates varying from U.S. statutory rate	(2.50%)	(3.00%)	(6.70%)
Excess tax benefits on share-based compensation	0.00%	(0.30%)	(0.30%)
State income taxes, net of federal benefit	1.30%	1.50%	1.40%
Cost (benefit) of remitted and unremitted foreign earnings	0.80%	0.70%	0.10%
Legal entity restructuring, deferred tax impact	0.00%	(3.30%)	0.00%
Discretionary pension contributions	0.00%	(2.30%)	0.00%
Revaluation of investment in foreign subsidiary	2.50%	0.00%	0.00%
Net change in valuation allowance	(1.60%)	2.00%	(0.40%)
U.S. deduction for qualified production activities	0.00%	0.00%	(1.40%)
Statutory rate changes, deferred tax impact	0.30%	0.00%	(9.00%)
U.S. deemed repatriation tax	0.00%	(1.20%)	10.40%
Intangible property transfer	0.00%	0.00%	(2.40%)
Divestiture	2.90%	0.00%	0.00%
Out-of-period adjustment	3.00%	0.00%	0.00%
Other	(3.10%)	(1.50%)	(1.90%)
Effective Income Tax Rate Reconciliation, Percent	24.60%	13.60%	24.80%

Income Taxes Deferred tax asset

Income Taxes Deferred tax assets and deferred tax liabilities (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Deferred Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 0	$ 0
Deferred Tax Liabilities Us State Income Taxes	6	19
Deferred Tax Assets Advertising And Promotion Related	11	11
Deferred Tax Assets Wages And Payroll Taxes	15	20
Deferred Tax Assets, Inventory	17	14
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits	143	132
Tax benefits of carryforwards	279	270
Deferred Tax Assets, Hedging Transactions	9	10
Deferred Tax Liabilities, Hedging Transactions	0	0
Deferred Tax Liabilities, Property, Plant and Equipment	217	220
Deferred Tax Liabilities, Intangible Assets	526	613
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	19	20
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	29	31
Deferred Tax Assets, Other	9	26
Deferred Tax Assets, Gross	531	534
Deferred Tax Liabilities, Gross	749	852
Deferred Tax Liabilities, Net	(364)	(484)
Deferred Tax Assets, Valuation Allowance	(146)	(166)	$ (153)	$ (131)
Deferred Tax Assets, Net of Valuation Allowance	385	368
Other Assets [Member]
Deferred Income Tax [Line Items]
Deferred Tax Assets, Net	231	246
Other liabilities
Deferred Income Tax [Line Items]
Deferred Tax Liabilities, Net	$ (595)	$ (730)

Income Taxes Change in Valuatio

Income Taxes Change in Valuation Allowance Against Deferred Tax Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 166	$ 153	$ 131
Additions charged to income tax expense	25	29	35
Reductions credited to income tax expense	(47)	(1)	(28)
Currency translation adjustments	2	(15)	15
Balance at end of year	$ 146	$ 166	$ 153

Income Taxes Unrecognized Tax B

Income Taxes Unrecognized Tax Benefit Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018		Dec. 30, 2017
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 97	$ 60		$ 63
Additions, current year	5	51	[1]	6
Additions, prior year	4	4		5
Reductions, prior year	(14)	(13)		(8)
Settlements, decreases	(1)	(4)		(4)
Lapse in statute of limitations	(1)	(1)		(2)
Balance at end of year	90	97		60
Tax reserves for transition tax on foreign earnings	47	47
Reduction to tax interest accrual	11
Income tax examination interest payments		2
Income Tax Examination, Interest Expense		3		2
Accrued tax-related interest and penalties	$ 11	$ 22		$ 21
[1]	During the fourth quarter of 2018, the Company recorded, as part of its final estimate under SAB 118, $47 million of tax reserves related to uncertainty in our interpretation of the statute and associated regulations.

Derivative Instruments and Fa_3

Derivative Instruments and Fair Value Measurements Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Derivative [Line Items]
Long-term debt, carrying value	$ 7,815	$ 8,717
Derivative, Collateral, Obligation to Return Cash	7	2
Concentration of credit risk, maximum exposure	$ 58
Five largest customers percentage of consolidated trade receivables	23.00%
Net Investment Hedging [Member]
Derivative [Line Items]
Long-term debt, carrying value	$ 2,600	$ 2,600
Accounts receivable
Derivative [Line Items]
Collateral posting	0
Margin deposits	12
Other liabilities
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	$ 19

Derivative Instruments and Fa_4

Derivative Instruments and Fair Value Measurements Total Notional Amounts of the Company's Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Derivative [Line Items]
Notional amount of derivatives	$ 6,563	$ 5,085
Foreign currency exchange contracts
Derivative [Line Items]
Notional amount of derivatives	2,628	1,863
Cross-currency contracts
Derivative [Line Items]
Notional amount of derivatives	1,540	1,197
Interest rate contracts
Derivative [Line Items]
Notional amount of derivatives	1,871	1,608
Commodity contracts
Derivative [Line Items]
Notional amount of derivatives	$ 524	$ 417

Derivative Instruments and Fa_5

Derivative Instruments and Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions		Dec. 28, 2019	Dec. 29, 2018
Derivative [Line Items]
Fair Value Of Related Hedge Portion Of Long Term Debt		$ 700	$ 1,600
Designated as hedging instrument
Derivative [Line Items]
Assets		96	96
Liabilities		(4)	(22)
Designated as hedging instrument | Level 1 [Member]
Derivative [Line Items]
Assets		0	0
Liabilities		0	0
Designated as hedging instrument | Level 2 [Member]
Derivative [Line Items]
Assets		96	96
Liabilities		(4)	(22)
Designated as hedging instrument | Cross-currency contracts | Other Current Assets [Member]
Derivative [Line Items]
Assets		45	0
Designated as hedging instrument | Cross-currency contracts | Other Assets [Member]
Derivative [Line Items]
Assets		40	79
Designated as hedging instrument | Cross-currency contracts | Level 1 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		0	0
Designated as hedging instrument | Cross-currency contracts | Level 1 [Member] | Other Assets [Member]
Derivative [Line Items]
Assets		0	0
Designated as hedging instrument | Cross-currency contracts | Level 2 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		45	0
Designated as hedging instrument | Cross-currency contracts | Level 2 [Member] | Other Assets [Member]
Derivative [Line Items]
Assets		40	79
Designated as hedging instrument | Interest rate contracts | Other Current Assets [Member]
Derivative [Line Items]
Assets	[1]	7	0
Designated as hedging instrument | Interest rate contracts | Other Assets [Member]
Derivative [Line Items]
Assets	[1]	4	17
Designated as hedging instrument | Interest rate contracts | Other current liabilities
Derivative [Line Items]
Liabilities	[1]	(4)	0
Designated as hedging instrument | Interest rate contracts | Other liabilities
Derivative [Line Items]
Liabilities	[1]	0	(22)
Designated as hedging instrument | Interest rate contracts | Level 1 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets	[1]	0	0
Designated as hedging instrument | Interest rate contracts | Level 1 [Member] | Other Assets [Member]
Derivative [Line Items]
Assets	[1]	0	0
Designated as hedging instrument | Interest rate contracts | Level 1 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities	[1]	0	0
Designated as hedging instrument | Interest rate contracts | Level 1 [Member] | Other liabilities
Derivative [Line Items]
Liabilities	[1]	0	0
Designated as hedging instrument | Interest rate contracts | Level 2 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets	[1]	7	0
Designated as hedging instrument | Interest rate contracts | Level 2 [Member] | Other Assets [Member]
Derivative [Line Items]
Assets	[1]	4	17
Designated as hedging instrument | Interest rate contracts | Level 2 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities	[1]	(4)	0
Designated as hedging instrument | Interest rate contracts | Level 2 [Member] | Other liabilities
Derivative [Line Items]
Liabilities	[1]	0	(22)
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Assets		21	6
Liabilities		(32)	(13)
Not Designated as Hedging Instrument [Member] | Level 1 [Member]
Derivative [Line Items]
Assets		9	3
Liabilities		(1)	(9)
Not Designated as Hedging Instrument [Member] | Level 2 [Member]
Derivative [Line Items]
Assets		12	3
Liabilities		(31)	(4)
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Other Current Assets [Member]
Derivative [Line Items]
Assets		12	3
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Other current liabilities
Derivative [Line Items]
Liabilities		(18)	(4)
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Level 1 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		0	0
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Level 1 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities		0	0
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Level 2 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		12	3
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts | Level 2 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities		(18)	(4)
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Other liabilities
Derivative [Line Items]
Liabilities		(13)	0
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Level 1 [Member] | Other liabilities
Derivative [Line Items]
Liabilities		0	0
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Level 2 [Member] | Other liabilities
Derivative [Line Items]
Liabilities		(13)	0
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other Current Assets [Member]
Derivative [Line Items]
Assets		9	3
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other current liabilities
Derivative [Line Items]
Liabilities		(1)	(9)
Not Designated as Hedging Instrument [Member] | Commodity contracts | Level 1 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		9	3
Not Designated as Hedging Instrument [Member] | Commodity contracts | Level 1 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities		(1)	(9)
Not Designated as Hedging Instrument [Member] | Commodity contracts | Level 2 [Member] | Other Current Assets [Member]
Derivative [Line Items]
Assets		0	0
Not Designated as Hedging Instrument [Member] | Commodity contracts | Level 2 [Member] | Other current liabilities
Derivative [Line Items]
Liabilities		$ 0	$ 0
[1]	The fair value of the related hedged portion of the Company’s long-term debt, a level 2 liability, was $0.7 billion and $1.6 billion as of December 28, 2019 and December 29, 2018

Derivative Instruments and Fa_6

Derivative Instruments and Fair Value Measurements Schedule of Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions		Dec. 28, 2019	Dec. 29, 2018
Derivatives, Fair Value [Line Items]
Current maturities of long-term debt		$ 620	$ 510
Long-term debt		7,195	8,207
Carrying amount of hedged liability | Fair value hedges | Interest rate contracts | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Current maturities of long-term debt		493	503
Long-term debt		2,643	3,354
Cumulative fair value adjustment | Fair value hedges | Interest rate contracts | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Current maturities of long-term debt	[1]	0	3
Long-term debt	[1]	19	(18)
Cumulative fair value adjustment | Discontinued hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Current maturities of long-term debt			3
Long-term debt		$ 15	$ (12)
[1]	The current maturities of hedged long-term debt includes $3 million of hedging adjustment on discontinued hedging relationships as of December 29, 2018 . The hedged long-term debt includes $15 million and $(12) million of hedging adjustment on discontinued hedging relationships as of December 28, 2019 and December 29, 2018 , respectively.

Derivative Instruments and Fa_7

Derivative Instruments and Fair Value Measurements Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net amount of assets presented in the balance sheet	$ 117	$ 102
Financial instruments, gross amount not offset in balance sheet	(27)	(27)
Cash collateral posted, gross amount not offset in balance sheet	(7)	(2)
Net amount, assets derivatives	83	73
Net amounts of liabilities presented in balance sheet	(36)	(35)
Financial instruments, gross amount not offset in balance sheet	27	27
Cash collateral received, gross amount not offset in balance sheet	0	0
Net amount, liabilities derivatives	$ (9)	$ (8)

Derivative Instruments and Fa_8

Derivative Instruments and Fair Value Measurements The Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 9
Gain (Loss) Recognized in AOCI	5	$ 3	$ 0
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	66	208
Gain (loss) excluded from assessment of hedge effectiveness	34	16
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(18)	(3)
Foreign currency exchange contracts | COGS [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(16)	19
Foreign currency exchange contracts | SGA | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(2)	1
Foreign currency exchange contracts | Other Income (Expense), Net | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(4)	0
Foreign Currency Denominated Long Term Debt | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	60	129
Gain (loss) excluded from assessment of hedge effectiveness	0	0
Cross-currency contracts | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	6	79
Gain (loss) excluded from assessment of hedge effectiveness	34	16
Commodity contracts | COGS [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	4	(23)
Commodity contracts | SGA | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ 0	$ 0

Derivative Instruments and Fa_9

Derivative Instruments and Fair Value Measurements Schedule of Effect of Fair Value and Cash Flow Hedge Accounting on Consolidated Statement of Income (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 15	$ 284	$ 287
Cost of goods sold		9,197	8,821	$ 8,155
Other income (expense), net		188	(90)	$ 526
Interest rate contracts | Interest expense | Designated as hedging instrument | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge		(33)	(5)
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments		37	9
Interest rate contracts | Interest expense | Designated as hedging instrument | Cash Flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from AOCI into Income		(4)	(8)
Foreign currency exchange contracts | Interest expense | Designated as hedging instrument | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from AOCI into Income		$ 0	$ 0

Derivative Instruments and F_10

Derivative Instruments and Fair Value Measurements Assets Measured at Fair Value (Details) - North America Other - Property, Plant and Equipment - Manufacturing Facility [Member] - Fair Value, Nonrecurring [Member] - Level 3 [Member] - Project K $ in Millions	Dec. 28, 2019USD ($)
Long-lived assets value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 19
Estimate fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 5

Derivative Instruments and F_11

Derivative Instruments and Fair Value Measurements Fair Value of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Fair Value Disclosures [Abstract]
Long-term debt, fair value	$ 7,800
Long-term debt, carrying value	$ 7,195	$ 8,207

Derivative Instruments and F_12

Derivative Instruments and Fair Value Measurements Schedule of Carrying and Market Values of Available-for-Sale Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, cost	$ 0	$ 59
Available-for-sale securities, unrealized gain (loss)	0	0
Available-for-sale securities, market value	0	$ 59
Level 2 [Member] | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, market value	63
Other Income (Expense), Net
Debt Securities, Available-for-sale [Line Items]
Gain on sale of available-for-sale securities	$ 4

Quarterly Financial Data Narrat

Quarterly Financial Data Narrative (Details)	Dec. 28, 2019
Quarterly Financial Information Disclosure [Abstract]
Number Of Shareholders	31,322

Quarterly Financial Data Net sa

Quarterly Financial Data Net sales and gross profit (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578	$ 13,547	$ 12,854
Gross Profit	$ 1,088	$ 1,000	$ 1,186	$ 1,107	$ 1,089	$ 1,176	$ 1,209	$ 1,252	$ 4,381	$ 4,726

Quarterly Financial Data Net in

Quarterly Financial Data Net income and earnings per share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018		Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Net income (loss) attributable to Kellogg Company, Basic	$ 145	$ 247	$ 286	$ 282	$ (84)	[1]	$ 380	$ 596	$ 444	$ 960	$ 1,336	$ 1,254
Basic	$ 0.43	$ 0.73	$ 0.84	$ 0.82	$ (0.24)		$ 1.10	$ 1.72	$ 1.28	$ 2.81	$ 3.85	$ 3.61
Diluted	$ 0.42	$ 0.72	$ 0.84	$ 0.82	$ (0.24)		$ 1.09	$ 1.71	$ 1.27	$ 2.80	$ 3.83	$ 3.58
[1]	The significant decrease in the fourth quarter 2018 net income is primarily due to a mark-to-market adjustment recognized on pension assets.

Quarterly Financial Data Divide

Quarterly Financial Data Dividends and stock prices (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Dividends per share	$ 0.57	$ 0.57	$ 0.56	$ 0.56	$ 0.56	$ 0.56	$ 0.54	$ 0.54	$ 2.26	$ 2.20

Quarterly Financial Data Asset

Quarterly Financial Data Asset impairment and MTM gains and losses (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Operating profit									$ 1,401	$ 1,706	$ 1,387
Other income (expense)									188	(90)	$ 526
Restructuring and cost reduction charges
Operating profit	$ (27)	$ (18)	$ (65)	$ (8)	$ (84)	$ (64)	$ (5)	$ (20)	(118)	(173)
Other income (expense)	5	0	0	0	0	30	0	0	5	30
Gains (Losses) on mark-to-market adjustments
Operating profit	0	(11)	46	(42)	(15)	(11)	3	30	(7)	7
Other income (expense)	$ (120)	$ 32	$ (11)	$ 1	$ (397)	$ 36	$ 2	$ 9	$ (98)	$ (350)

Reportable Segments Narrative (

Reportable Segments Narrative (Details) $ in Millions		Jul. 28, 2019USD ($)	Dec. 28, 2019USD ($)	Sep. 28, 2019USD ($)	Jun. 29, 2019USD ($)	Mar. 30, 2019USD ($)	Dec. 29, 2018USD ($)	Sep. 29, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 28, 2019USD ($)		Dec. 29, 2018USD ($)	Dec. 30, 2017USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments											4
Net sales			$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578		$ 13,547	$ 12,854
Operating profit											1,401		1,706	1,387
Proceeds from divestiture of businesses											$ 1,332		$ 0	$ 0
Walmart Stores Inc [Member]
Segment Reporting Information [Line Items]
Largest customer, percentage of consolidated net sales											19.00%		19.00%	20.00%
Europe transfer to AMEA
Segment Reporting Information [Line Items]
Net sales													$ 273	$ 241
Operating profit													46	56
North America
Segment Reporting Information [Line Items]
Net sales											$ 8,390		8,688	8,673
Operating profit	[1]										$ 1,215	[2]	$ 1,397	$ 1,246
Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses
Segment Reporting Information [Line Items]
Proceeds from divestiture of businesses		$ 1,300
Net assets		1,300
Cookies, fruit and fruit flavored snacks, pie crusts and ice cream cones businesses | North America
Segment Reporting Information [Line Items]
Proceeds from divestiture of businesses		1,300
Net assets		$ 1,300
[1]	Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million , respectively.
[2]	During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million .

Reportable Segments Information

Reportable Segments Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019		Dec. 29, 2018		Dec. 30, 2017
Segment Reporting Information [Line Items]
Net sales		$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578		$ 13,547		$ 12,854
Operating profit										1,401		1,706		1,387
Depreciation and amortization										484		516		481
Interest expense										284		287		256
Income taxes										321		181		410
Property, Plant and Equipment, Additions										586		578		501
Pre-tax charge, multi-employer pension plan withdrawal										132		7		26
Research and development expense										144		154		148
North America
Segment Reporting Information [Line Items]
Net sales										8,390		8,688		8,673
Operating profit	[1]									1,215	[2]	1,397		1,246
Depreciation and amortization										291		341	[3]	330
Interest expense										0		1		3
Property, Plant and Equipment, Additions										356		336		329
Pre-tax charge, multi-employer pension plan withdrawal										132
Research and development expense												48		47
Europe
Segment Reporting Information [Line Items]
Net sales										2,092		2,122		2,050
Operating profit										222		251		220
Depreciation and amortization										80		78		78
Interest expense										6		6		14
Income taxes										48		23		(37)
Property, Plant and Equipment, Additions										83		84		102
Latin America
Segment Reporting Information [Line Items]
Net sales										940		947		944
Operating profit										85		102		108
Depreciation and amortization										30		37		37
Interest expense										9		3		2
Income taxes										16		30		33
Property, Plant and Equipment, Additions										41		76		32
AMEA
Segment Reporting Information [Line Items]
Net sales										2,156		1,790		1,187
Operating profit										195		174		140
Depreciation and amortization										76		57		35
Interest expense										14		9		4
Income taxes										23		23		10
Property, Plant and Equipment, Additions										101		79		34
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating profit										1,717		1,924		1,714
Depreciation and amortization										477		513		480
Corporate
Segment Reporting Information [Line Items]
Operating profit	[1]									(316)		(218)		(327)
Depreciation and amortization										7		3		1
Interest expense										255		268		233
Property, Plant and Equipment, Additions										5		3		4
Corporate And North America
Segment Reporting Information [Line Items]
Income taxes										$ 234		$ 105		$ 404
[1]	Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million , respectively.
[2]	During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million .
[3]	Includes asset impairment charges as discussed in Note 14 .

Reportable Segments Net sales t

Reportable Segments Net sales to external customers and long-lived assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578	$ 13,547	$ 12,854
Property, net	3,612				3,731				3,612	3,731	3,716
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									7,885	8,176	8,160
Property, net	1,996				2,197				1,996	2,197	2,195
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									5,693	5,371	4,694
Property, net	$ 1,616				$ 1,534				$ 1,616	$ 1,534	$ 1,521

Reportable Segments Supplementa

Reportable Segments Supplemental product information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	$ 13,578	$ 13,547	$ 12,854
Snacks
Segment Reporting Information [Line Items]
Net sales									6,663	6,797	6,683
Retail Channel Cereal
Segment Reporting Information [Line Items]
Net sales									5,029	5,203	5,222
Frozen
Segment Reporting Information [Line Items]
Net sales									1,037	1,020	949
Noodles and other
Segment Reporting Information [Line Items]
Net sales									$ 849	$ 527	$ 0

Supplemental Financial Statem_3

Supplemental Financial Statement Data Consolidated Statement of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Supplemental Financial Statement Data [Abstract]
Research and development expense	$ 144	$ 154	$ 148
Advertising Expense	$ 676	$ 752	$ 732

Supplemental Financial Statem_4

Supplemental Financial Statement Data Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Supplemental Financial Statement Data [Abstract]
Trade receivables	$ 1,315	$ 1,163
Allowance for doubtful accounts	(10)	(10)	$ (10)	$ (8)
Refundable income taxes	56	28
Other Receivables	215	194
Accounts receivable, net	1,576	1,375
Raw materials and supplies	303	339
Finished goods and materials in process	923	991
Inventories, net	1,226	1,330
Land	116	120
Buildings	2,021	2,061
Machinery and equipment	5,852	5,971
Capitalized software	496	438
Construction in progress	566	583
Accumulated depreciation	(5,439)	(5,442)
Property, net	3,612	3,731	3,716
Other intangibles	2,677	3,448
Accumulated amortization	(101)	(87)	$ (67)
Other intangibles, net	2,576	3,361
Pension	241	228
Deferred income taxes	231	246
Other	667	594
Other Assets	1,139	1,068
Accrued income taxes	42	48
Accrued salaries and wages	290	309
Accrued advertising and promotion	641	557
Other	577	502
Other Liabilities, Current	1,550	1,416
Income taxes payable	81	115
Nonpension postretirement benefits	33	34
Other	429	355
Other liabilities	$ 543	$ 504

Supplemental Financial Statem_5

Supplemental Financial Statement Data Allowance for doubtful accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Supplemental Financial Statement Data [Abstract]
Balance at beginning of year	$ 10	$ 10	$ 8
Additions charged to expense	9	4	14
Doubtful accounts charged to reserve	(9)	(4)	(12)
Balance at end of year	$ 10	$ 10	$ 10