Product Warranty (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Warranty reserve activity:
Balance at beginning of period	$ 324.8	$ 296.9	$ 316.0	$ 255.6
Acquisitions	0.0	2.1	0.0	2.1
Accruals for warranties issued during the period	55.6	47.7	164.3	152.6
Settlements made (in cash or in kind) during the period	(49.7)	(49.3)	(139.7)	(127.4)
Foreign currency translation	(0.7)	6.2	(10.6)	20.7
Balance at end of period	330.0	$ 303.6	$ 330.0	$ 303.6
Product warranty period, minimum, years			1 year
Product warranty period, maximum, years			4 years
Product warranty accrual, current	283.9		$ 283.9		$ 273.6
Product warranty accrual, noncurrent	$ 46.1		$ 46.1		$ 42.4

Product warranty period maximum.

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- Definition

Product warranty period minimum.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

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- Definition

Amount of increase in the standard and extended product warranty accrual from a business acquisition.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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

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- Definition

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

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- Definition

Amount of foreign currency translation gain (loss) which decreases (increases) the standard and extended product warranty accrual.

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