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Revenue and Contracts with Customers (Revenue from External Customers by Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue	$ 154.5	$ 189.0	$ 227.6	$ 232.7
Product [Member]
Revenue	125.7	169.6	177.0	193.2
Product [Member] | United States
Revenue	57.2	62.5	108.5	86.1
Product [Member] | Other Foreign
Revenue	$ 68.5	$ 107.1	$ 68.5	$ 107.1

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- Definition

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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