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Inventories (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Major classes of inventories
Finished goods	$ 196.8	$ 197.4
Service parts	135.2	125.6
Raw materials and work in process	90.5	82.2
Total inventories	$ 422.5us-gaap_InventoryNet	$ 405.2us-gaap_InventoryNet

The aggregate carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of items which are partially completed at the time of measurement and unprocessed items that will go through the production process and become part of the final product. This element may be used when the reporting entity combines work in process and raw materials into an aggregate amount.

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