Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Operating activities
Net income	$ 1,056	$ 825
Adjustments to reconcile net income to operating cash flows:
Depreciation and amortization	355	360
Postretirement benefit plan expense (benefit)	(113)	(158)
Deferred income taxes	57	(206)
Stock compensation	55	42
Multi-employer pension plan exit liability	(5)	132
Other	(34)	(70)
Postretirement benefit plan contributions	(19)	(19)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(113)	(253)
Inventories	(57)	16
Accounts payable	108	0
All other current assets and liabilities	303	256
Net cash provided by (used in) operating activities	1,593	925
Investing activities
Additions to properties	(326)	(436)
Purchase of marketable securities	(250)	0
Acquisitions, net of cash acquired	0	(8)
Acquisition of cost method investments	(4)	0
Divestitures	0	1,332
Purchases of available for sale securities	(75)	(18)
Sales of available for sale securities	13	83
Other	(7)	(22)
Net cash provided by (used in) investing activities	(649)	931
Financing activities
Net issuances (reductions) of notes payable	9	9
Issuances of long-term debt	554	40
Reductions of long-term debt	(45)	(1,000)
Debt redemption costs	0	(17)
Net issuances of common stock	105	40
Common stock repurchases	0	(220)
Cash dividends	(586)	(574)
Collateral received on derivative instruments	(14)	0
Other	(2)	(9)
Net cash provided by (used in) financing activities	21	(1,731)
Effect of exchange rate changes on cash and cash equivalents	(33)	7
Increase (decrease) in cash and cash equivalents	932	132
Cash and cash equivalents at beginning of period	397	321
Cash and cash equivalents at end of period	1,329	453
Supplemental cash flow disclosures
Interest paid	124	180
Income taxes paid	212	211
Supplemental cash flow disclosures of non-cash investing activities
Additions to properties included in accounts payable	$ 108	$ 93