Changes in Carrying Amount of Goodwill (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
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Dec. 31, 2016 |
Dec. 31, 2015 |
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Goodwill [Line Items] | ||||
Business acquisition | [1] | $ 7.8 | $ 21.3 | |
TNT | ||||
Goodwill [Line Items] | ||||
Business acquisition | $ 7.8 | |||
Energy Source | ||||
Goodwill [Line Items] | ||||
Business acquisition | $ 21.3 | |||
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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