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Software and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Other intangible assets amortization expense	$ 7.1	$ 8.5	$ 23.8	$ 25.4
Software for Internal Use
Finite-Lived Intangible Assets [Line Items]
Software, amortization expense	$ 16.6	$ 16.3	$ 47.9	$ 49.3
Minimum | Software for Internal Use
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	3 years		3 years
Maximum | Software for Internal Use
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	8 years		8 years

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of expense for amortization of capitalized computer software costs.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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