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Postretirement Benefit Plans - Actual Versus Expected Long-Term Returns for Our Domestic Pension Plans (Detail) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Postemployment Benefits [Abstract] |  |  |
Expected rate of return on plan assets | 8.00% | 8.00% | 8.00%
Actual rate of return on plan assets | (2.80%) | 8.60% | 14.20%

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- Definition Actual rate of return on plan assets. + References No definition available. + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- References No definition available. + Details
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