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Revenues from Contracts (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,462.8	$ 1,198.2	$ 4,265.5	$ 3,518.6
Software and related services
Disaggregation of Revenue [Line Items]
Net revenues	919.3	714.8	2,673.6	2,038.8
Engineered products and related services
Disaggregation of Revenue [Line Items]
Net revenues	$ 543.5	$ 483.4	$ 1,591.9	$ 1,479.8

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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