Tax Matters (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Foreign currency translation adjustments, net	[1]	$ (17)	$ 101	$ 10	$ 67
Unrealized holding gains/(losses) on derivative financial instruments, net		(53)	8	6	4
Reclassification adjustments for (gains)/losses included in net income		(4)	72	(59)	65
Derivatives qualifying as hedges, tax, total		(57)	79	(53)	70
Unrealized holding gains/(losses) on available-for-sale securities, net		(1)	(48)	4	(28)
Reclassification adjustments for (gains)/losses included in net income		3	20	5	(2)
Available-for-sale securities, tax, total		2	(29)	9	(76)
Benefit plans: actuarial gains/(losses), net		(1)	(13)	(1)	25
Reclassification adjustments related to amortization		15	14	18	28
Reclassification adjustments related to settlements, net		0	7	1	15
Other		8	27	3	6
Defined benefit plans, actuarial gain (loss), tax, total		23	34	21	712
Benefit plans: prior service costs and other, net		0	0	0	0
Reclassification adjustments related to amortization of prior service costs and other, net		(11)	(11)	(22)	(22)
Reclassification adjustments related to curtailments of prior service costs and other, net		0	4	0	(3)
Other		0	(6)	0	0
Pension and other postretirement benefit plans, net prior service cost (credit), tax		(11)	(13)	(22)	(168)
Tax provision/(benefit) on other comprehensive loss	[2]	(59)	173	(34)	605
ASU 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification adjustments of certain tax effects from AOCI to Retained earnings	[3]	0	0	0	1
Reclassification adjustments of certain tax effects from AOCI to Retained earnings	[3]	0	0	0	637
Reclassification adjustments of certain tax effects from AOCI to Retained earnings	[3]	0	0	0	(144)
ASU 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification adjustments for tax on unrealized gains from AOCI to Retained earnings	[4]	$ 0	$ 0	$ 0	$ (45)

[1] Taxes are not provided for foreign currency translation adjustments relating to investments in international subsidiaries that will be held indefinitely.

[2] Amounts may not add due to rounding.

[3] For additional information on the adoption of a new accounting standard related to reclassification of certain tax effects from AOCI, see Notes to Consolidated Financial Statements––Note 1B. Basis of Presentation and Significant Accounting Policies: Adoption of New Accounting Standards in 2018 in our 2018 Financial Report.

[4] For additional information on the adoption of a new accounting standard related to financial assets and liabilities, see Notes to Consolidated Financial Statements––Note 1B. Basis of Presentation and Significant Accounting Policies: Adoption of New Accounting Standards in 2018 in our 2018 Financial Report.