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Intangible assets - Narrative (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Jan. 09, 2024
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 233.0	$ 459.9
HumanFirst Inc
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1.0
Intangible assets acquired				$ 9.9

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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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The amount of identifiable intangible assets recognized as of the acquisition date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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