Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Operating activities
Net income	$ 1,043	$ 549
Adjustments to reconcile net income to operating cash flows:
Depreciation and amortization	234	240
Postretirement benefit plan expense (benefit)	(86)	(96)
Deferred income taxes	69	(66)
Stock compensation	30	36
Gain on unconsolidated entities, net	(200)	0
Other	(67)	36
Postretirement benefit plan contributions	(274)	(28)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(83)	(716)
Inventories	(38)	63
Accounts payable	64	70
All other current assets and liabilities	(245)	4
Net cash provided by (used in) operating activities	447	92
Investing activities
Additions to properties	(270)	(268)
Collections of deferred purchase price on securitized trade receivables	0	568
Acquisitions, net of cash acquired	(28)	4
Investments in unconsolidated entities	(388)	0
Acquisition of cost method investment	(4)	0
Other	29	(4)
Net cash provided by (used in) investing activities	(661)	300
Financing activities
Net issuances (reductions) of notes payable	(76)	287
Issuances of long-term debt	993	655
Reductions of long-term debt	(401)	(626)
Net issuances of common stock	70	65
Common stock repurchases	(50)	(390)
Cash dividends	(374)	(363)
Net cash provided by (used in) financing activities	162	(372)
Effect of exchange rate changes on cash and cash equivalents	28	34
Increase (decrease) in cash and cash equivalents	(24)	54
Cash and cash equivalents at beginning of period	281	280
Cash and cash equivalents at end of period	257	334
Supplemental cash flow disclosures
Interest paid	151	138
Income taxes paid	76	205
Supplemental cash flow disclosures of non-cash investing activities [Abstract]
Beneficial interests obtained in exchange for securitized trade receivables	0	566
Additions to properties included in accounts payable	$ 77	$ 82