Goodwill and Acquired Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 1,692.7
Impairment loss	$ (650.5)	$ 0.0	(650.5)	$ 0.0
Goodwill, Ending Balance	$ 1,042.2		$ 1,042.2

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details