Changes in Product Support Liabilities (Detail) - Truck, Parts and Other - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016
WARRANTY RESERVES
Beginning balance	$ 282.1	$ 346.2
Cost accruals	102.7	109.3
Payments	(121.6)	(128.8)
Change in estimates for pre-existing warranties	2.6	(2.8)
Currency translation	8.6	(4.0)
Ending balance	274.4	319.9
DEFERRED REVENUES ON EXTENDED WARRANTIES AND R&M CONTRACTS
Beginning balance	573.5	524.8
Deferred revenues	176.7	192.0
Revenues recognized	(152.9)	(135.9)
Currency translation	22.8	(7.0)
Ending balance	$ 620.1	$ 573.9

Deferred Revenue, Currency Translation, Increase (Decrease)

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Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of revenue recognized that was previously reported as deferred or unearned revenue.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of foreign currency translation gain (loss) which decreases (increases) the standard product warranty accrual. Excludes extended product warranties.

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Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties.

+ References

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Amount of increase (decrease) in the standard product warranty accrual from changes in estimates attributable to preexisting product warranties. Excludes extended product warranties.

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Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties.

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