Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Operating activities
Net income	$ 444	$ 266
Adjustments to reconcile net income to operating cash flows:
Depreciation and amortization	122	121
Postretirement benefit plan expense (benefit)	(47)	(56)
Deferred income taxes	(1)	(66)
Stock compensation	16	17
Other	(30)	30
Postretirement benefit plan contributions	(19)	(24)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(175)	(437)
Inventories	13	58
Accounts payable	(4)	11
All other current assets and liabilities	(91)	46
Net cash provided by (used in) operating activities	228	(34)
Investing activities
Additions to properties	(132)	(130)
Collections of deferred purchase price on securitized trade receivables	0	245
Other	1	(1)
Net cash provided by (used in) investing activities	(131)	114
Financing activities
Net issuances (reductions) of notes payable	99	191
Reductions of long-term debt	0	(1)
Net issuances of common stock	50	40
Common stock repurchases	0	(125)
Cash dividends	(187)	(182)
Net cash provided by (used in) financing activities	(38)	(77)
Effect of exchange rate changes on cash and cash equivalents	30	15
Increase (decrease) in cash and cash equivalents	89	18
Cash and cash equivalents at beginning of period	281	280
Cash and cash equivalents at end of period	370	298
Supplemental cash flow disclosures
Interest paid	14	16
Income taxes paid	31	16
Supplemental cash flow dislcosures of non-cash investing activities [Abstract]
Beneficial interests obtained in exchange for securitized trade receivables	0	256
Additions to properties included in accounts payable	$ 92	$ 106