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Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2020 | Jun. 28, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 | [1] |  | $ 63,143
Balance, June 28, 2020 | [1] | $ 64,336 | 64,336
Foreign currency translation income (loss) attributable to noncontrolling interest |  |  | 12
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | (11,640)
Other comprehensive income/(loss) | [2] |  | (1,605)
Balance, June 28, 2020 |  | (13,246) | (13,246)
Foreign Currency Translation Adjustment [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | (5,952)
Other comprehensive income/(loss) | [2] |  | (1,310)
Balance, June 28, 2020 |  | (7,262) | (7,262)
Derivative Financial Instruments [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | 20
Other comprehensive income/(loss) | [2] |  | (353)
Balance, June 28, 2020 |  | (333) | (333)
Available-For-Sale Securities [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | (35)
Other comprehensive income/(loss) | [2] |  | 44
Balance, June 28, 2020 |  | 9 | 9
Actuarial Gains/(Losses) [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | (6,257)
Other comprehensive income/(loss) | [2] |  | 79
Balance, June 28, 2020 |  | (6,178) | (6,178)
Prior Service (Costs)/Credits and Other [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance, December 31, 2019 |  |  | 584
Other comprehensive income/(loss) | [2] |  | (65)
Balance, June 28, 2020 |  | 518 | 518
GSK Consumer Healthcare [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Other comprehensive income (loss), foreign currency transaction and translation adjustment, net of tax |  | $ 291 | $ (902)
[1] | Amounts may not add due to rounding.
[2] | Amounts do not include foreign currency translation adjustments attributable to noncontrolling interests of $12 million loss for the first six months of 2020. Includes after-tax losses of approximately $902 million related to foreign currency translation adjustments and the impact of our net investment hedging program, both attributable to our equity method investment in GSK Consumer Healthcare (see Note 2B), and losses from the weakening of certain major currencies against the U.S. dollar. These losses were partially offset by the results of our net investment hedging program.

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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 + Details
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