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Tax - Difference Between Effective Tax Rate (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Income Tax Disclosure [Abstract] |  |  |  |
Federal income tax at U.S. federal statutory rate | $ 344 | $ 301 | $ 932 | $ 783
Foreign income tax rate differential | (91) | (50) | (189) | (172)
State income tax, net of federal benefit | 8 | 5 | 23 | 17
Nondeductible expenses | 1 | 4 | 20 | 20
Tax benefit of manufacturing deduction | (13) | (4) | (31) | (20)
Foreign dividends, net of foreign tax credits | 113 | 12 | 134 | 24
Tax impact of foreign exchange | 16 | (12) | 14 | 27
Tax rate change on temporary differences |  | (16) |  | (16)
Change in valuation allowance | (94) | 32 | (92) | 40
Other | (1) | (9) | (5) | (17)
Provision for income taxes | $ 283 | $ 263 | $ 806 | $ 686

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- Definition Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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