Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income/(loss)	$ 1,003	$ 881	$ 1,756	$ 2,038	$ 2,374	$ 2,950	$ (10,254)	$ 10,932	$ 3,606
Adjustments to reconcile net income/(loss) to operating cash flows:
Depreciation and amortization	227	262	462	517	712	789	983	1,031	1,337
Amortization of postretirement benefit plans prior service costs/(credits)	(106)	(82)	(183)	(171)	(261)	(247)	(339)	(328)	(347)
Equity award compensation expense	7	11	27	24	44	36	33	46	46
Deferred income tax provision/(benefit)	(46)	68	79	223	104	432	(1,967)	(6,495)	(72)
Postemployment benefit plan contributions	(22)	(38)	(60)	(90)	(64)	(283)	(76)	(1,659)	(494)
Goodwill and intangible asset impairment losses	0	0	234	48	451	49	15,936	49	18
Nonmonetary currency devaluation	47	8	67	33	131	36	146	36	24
Other items, net	(22)	40	27	(48)	35	(62)	175	253	25
Changes in current assets and liabilities:
Trade receivables	(712)	(1,040)	(2,001)	(1,598)	(2,154)	(2,061)	(2,280)	(2,629)	(2,055)
Inventories	(312)	(475)	(428)	(418)	(645)	(567)	(251)	(236)	(130)
Accounts payable	(85)	62	127	84	130	123	(23)	441	879
Other current assets	26	(72)	(44)	(103)	(103)	(90)	(146)	(64)	(41)
Other current liabilities	403	(240)	153	(717)	124	(1,090)	637	(876)	(148)
Net cash provided by/(used for) operating activities	408	(615)	216	(178)	878	15	2,574	501	2,648
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash receipts on sold receivables	436	464	1,221	1,069	1,296	1,633	1,296	2,286	2,589
Capital expenditures	(223)	(368)	(438)	(690)	(594)	(956)	(826)	(1,194)	(1,247)
Payments to acquire business, net of cash acquired	(215)	0	(215)	0	(248)	0	(248)	0	0
Other investing activities, net	6	38	11	44	31	45	66	85	110
Net cash provided by/(used for) investing activities	4	134	579	423	485	722	288	1,177	1,452
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt	(6)	(27)	(12)	(2,032)	(2,706)	(2,635)	(2,713)	(2,641)	(85)
Proceeds from issuance of long-term debt	0	2	2,990	4	2,990	1,496	2,990	1,496	6,981
Proceeds from issuance of commercial paper	1,524	2,324	1,525	4,213	2,485	5,495	2,784	6,043	6,680
Repayments of commercial paper	(1,006)	(2,068)	(1,950)	(3,777)	(1,950)	(5,709)	(3,213)	(6,249)	(6,043)
Dividends paid - Series A Preferred Stock	0	0	0	0	0	0	0	0	(180)
Dividends paid - common stock	(897)	(736)	(1,659)	(1,434)	(2,421)	(2,161)	(3,183)	(2,888)	(3,584)
Redemption of Series A Preferred Stock	0	0	0	0	0	0	0	0	(8,320)
Other financing activities, net	14	0	(3)	15	(35)	28	(28)	18	(69)
Net cash provided by/(used for) financing activities	(371)	(505)	891	(3,011)	(1,637)	(3,486)	(3,363)	(4,221)	(4,620)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(10)	13	(80)	29	(128)	43	(132)	57	(137)
Cash, cash equivalents, and restricted cash
Net increase/(decrease)	31	(973)	1,606	(2,737)	(402)	(2,706)	(633)	(2,486)	(657)
Balance at beginning of period	1,769	4,255	1,769	4,255	1,769	4,255	1,769	4,255	4,912
Balance at end of period	1,800	3,282	3,375	1,518	1,367	1,549	1,136	1,769	4,255
Non-cash investing activities:
Beneficial interest obtained in exchange for securitized trade receivables	$ 613	$ 880	$ 899	$ 1,407	$ 938	$ 1,936	938	2,519	2,213
Cash paid during the period for:
Interest							1,322	1,269	1,176
Income taxes							$ 543	$ 1,206	$ 1,619