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Pension and Postretirement Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension contributions | $ 103.1 | $ 61.3 | $ 147.2
Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Cash contributions | 6.4 | 7.0 | 18.0
Scenario, Forecast | Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated cash contributions by the company in 2014 | 235 |  |
Scenario, Forecast | International Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated cash contributions by the company in 2014 | 109 |  |
Scenario, Forecast | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated cash contributions by the company in 2014 | 126 |  |
Scenario, Forecast | Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated cash contributions by the company in 2014 | $ 19 |  |

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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
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- Definition The amount of cash or cash equivalents contributed by the entity to fund its pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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