Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

Reference 2: 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)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Income Taxes - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended					6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 EUR (€)	Mar. 31, 2016 USD ($)	Mar. 31, 2016 EUR (€)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Income Taxes [Line Items]
Effective tax rate	25.50%	25.50%			31.40%	152.30%	32.00%
European commission charge						$ 833.0	$ 0.0
Truck, Parts and Other
Income Taxes [Line Items]
European commission charge	$ (109.6)	€ (97.3)	$ 942.6	€ 850.0	$ 0.0	$ 833.0	$ 0.0