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