Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Operating activities
Net income	$ 285	$ 444
Adjustments to reconcile net income to operating cash flows:
Depreciation and amortization	124	122
Postretirement benefit plan expense (benefit)	(38)	(47)
Deferred income taxes	7	(1)
Stock compensation	13	16
Other	(8)	(30)
Postretirement benefit plan contributions	(5)	(19)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(229)	(175)
Inventories	12	13
Accounts payable	(16)	(4)
All other current assets and liabilities	(75)	(91)
Net cash provided by (used in) operating activities	70	228
Investing activities
Additions to properties	(148)	(132)
Purchases of available for sale securities	(7)	0
Sales of available for sale securities	7	0
Other	(15)	1
Net cash provided by (used in) investing activities	(163)	(131)
Financing activities
Net issuances (reductions) of notes payable	429	99
Net issuances of common stock	7	50
Common stock repurchases	(220)	0
Cash dividends	(192)	(187)
Net cash provided by (used in) financing activities	24	(38)
Effect of exchange rate changes on cash and cash equivalents	20	30
Increase (decrease) in cash and cash equivalents	(49)	89
Cash and cash equivalents at beginning of period	321	281
Cash and cash equivalents at end of period	272	370
Supplemental cash flow disclosures
Interest paid	8	14
Income taxes paid	79	31
Supplemental cash flow disclosures of non-cash investing activities
Additions to properties included in accounts payable	$ 122	$ 92