Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Net rental expense under operating leases was as follows:



	Years ended December 31
In millions	2017			2016			2015
Gross rental expense	$	40.4		$	37.5		$	26.4
Sublease rental income	(0.3		)	(0.7		)	(0.4		)
Net rental expense	$	40.1		$	36.8		$	26.0

Net future minimum lease commitments

Future minimum lease commitments under non-cancelable operating leases, principally related to facilities, machinery, equipment and vehicles as of December 31, 2017 were as follows:



In millions	2018			2019		2020		2021		2022		Thereafter		Total
Minimum lease payments	$	34.3		$	29.1	$	21.2	$	15.6	$	13.1	$	15.1	$	128.4
Minimum sublease rentals	(0.3		)	—		—		—		—		—		(0.3		)
Net future minimum lease commitments	$	34.0		$	29.1	$	21.2	$	15.6	$	13.1	$	15.1	$	128.1

Changes in Carrying Amount of Service and Product Warranties

The changes in the carrying amount of service and product warranties for the years ended December 31, 2017 and 2016 were as follows:



	Years ended December 31
In millions	2017			2016
Beginning balance	$	38.9		$	47.0
Service and product warranty provision	64.1			59.7
Payments	(62.7		)	(67.3		)
Foreign currency translation	0.7			(0.5		)
Ending balance	$	41.0		$	38.9