| **Tax Matters (Tables)**                                     | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
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| **Income Tax Disclosure [Abstract]**                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Schedule of Tax Benefit on Other Comprehensive Income/(Loss) | The following table provides the components of the tax provision/(benefit) on Other comprehensive loss:  Three Months Ended(MILLIONS OF DOLLARS) March 30, 2014 March 31, 2013     Foreign currency translation adjustments(a) $(7) $71Unrealized holding losses on derivative financial instruments (17) (155)Reclassification adjustments for realized (gains)/losses (1) 167  (18) 12Unrealized holding gains on available-for-sale securities 27 11Reclassification adjustments for realized gains (29) (25)  (2) (14)Benefit plans: actuarial gains, net 1 6Reclassification adjustments related to amortization 16 54Reclassification adjustments related to settlements, net 8 20Foreign currency translation adjustments and other (12) 37  13 117Benefit plans: prior service costs and other — (1)Reclassification adjustments related to amortization (7) (6)Reclassification adjustments related to curtailments, net (1) (3)Other 5 —  (3) (10)Tax provision/(benefit) on other comprehensive loss $(17) $176(a) Taxes are not provided for foreign currency translation adjustments relating to investments in international subsidiaries that will be held indefinitely |

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| - Definition
Tabular disclosure of comprehensive income (loss) tax expense (benefit) components including, but not limited to regarding tax effects on foreign currency translation adjustments, change in the market value of a futures contract and tax effects on net prior service cost or credit for pension plans and other postretirement benefit plans.
+ References
No definition available.
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| - Details**Name:**us-gaap_IncomeTaxDisclosureAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |