Changes in Product Support Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
WARRANTY RESERVES
Beginning balance	$ 298.8
Ending balance	380.2	$ 298.8
DEFERRED REVENUES ON EXTENDED WARRANTIES AND R&M CONTRACTS
Beginning balance	653.9
Ending balance	699.9	653.9
Truck, Parts and Other
WARRANTY RESERVES
Beginning balance	298.8	282.1	$ 346.2
Cost accruals	331.9	242.1	211.9
Payments	(271.8)	(236.8)	(255.7)
Change in estimates for pre-existing warranties	25.6	(2.0)	(7.3)
Currency translation and other	(4.3)	13.4	(13.0)
Ending balance	380.2	298.8	282.1
DEFERRED REVENUES ON EXTENDED WARRANTIES AND R&M CONTRACTS
Beginning balance	653.9	573.5	524.8
Deferred revenues	448.2	371.8	347.6
Revenues recognized	(385.0)	(328.2)	(274.3)
Currency translation	(17.2)	36.8	(24.6)
Ending balance	$ 699.9	$ 653.9	$ 573.5

Contract with customer liability additions.

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- Definition

Contract with customer liability, currency translation, increase (decrease).

+ References

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Standard product warranty accrual currency translation and other.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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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.

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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.

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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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