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Tax Matters (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Foreign currency translation adjustments, net | [1] | $ 14 | $ (62) | $ 82 | $ (192)
Unrealized holding gains/(losses) on derivative financial instruments, net |  | 35 | 28 | 39 | 30
Reclassification adjustments for (gains)/losses included in net income |  | (28) | (29) | 36 | (169)
Derivatives qualifying as hedges, tax, total |  | 7 | (1) | 77 | (139)
Unrealized holding gains/(losses) on available-for-sale securities, net |  | 20 | 37 | (8) | 93
Reclassification adjustments for gains included in net income |  | (6) | (49) | (8) | (45)
Available-for-sale securities, tax, total |  | 14 | (12) | (62) | 47
Benefit plans: actuarial gains/(losses), net |  | 2 | (37) | 27 | (15)
Reclassification adjustments related to amortization |  | 15 | 60 | 43 | 152
Reclassification adjustments related to settlements, net |  | 10 | 22 | 25 | 30
Other |  | 11 | (33) | 18 | (46)
Defined benefit plans, actuarial gain (loss), tax, total |  | 38 | 11 | 750 | 121
Benefit plans: prior service costs and other, net |  | 0 | 0 | 0 | 0
Reclassification adjustments related to amortization |  | (11) | (17) | (33) | (50)
Reclassification adjustments related to curtailments, net |  | (1) | (1) | (4) | (5)
Other |  | 1 | 1 | 1 | 1
Pension and other postretirement benefit plans, net prior service cost (credit), tax |  | (11) | (17) | (179) | (55)
Tax provision/(benefit) on other comprehensive income/(loss) | [2] | 62 | (80) | 667 | (218)
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 | 1 | 0
Reclassification adjustments of certain tax effects from AOCI to Retained earnings | [3] | 0 | 0 | 637 | 0
Reclassification adjustments of certain tax effects from AOCI to Retained earnings | [3] | 0 | 0 | (144) | 0
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 | $ (45) | $ 0
[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 Note 1B.
[4] | For additional information on the adoption of a new accounting standard related to financial assets and liabilities, see Note 1B.

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