Segment Reporting - Geographical (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	$ 6,562.5	$ 4,015.6	$ 12,805.4	$ 7,706.0
Americas
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	4,239.4	2,324.3	8,320.5	4,532.2
Long-lived assets and goodwill	13,880.5	8,148.0	13,880.5	8,148.0
EMEA
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	1,729.3	1,232.5	3,312.5	2,298.3
Long-lived assets and goodwill	5,774.5	4,054.3	5,774.5	4,054.3
Asia-Pacific
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	593.9	458.8	1,172.4	875.5
Long-lived assets and goodwill	$ 1,345.0	$ 723.5	$ 1,345.0	$ 723.5

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details