Inventories - Summary (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Inventory, Net [Abstract]
Raw materials, including parts and subassemblies	$ 498.6	$ 451.0
Work-in-process	94.7	62.2
Finished goods	261.5	194.7
Gross inventories	854.8	707.9
Excess of LIFO costs over FIFO costs	8.8	8.8
Inventories	$ 863.6	$ 716.7

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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