Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
Jul. 29, 2026	Jun. 30, 2027
MarketAxess Holdings Inc. \| Forecast
Subsequent Event [Line Items]
Total purchase price		$ 6,000
Purchase price per share (in usd per share)		$ 167
Subsequent Event \| Bridge Facility \| Bridge Loan
Subsequent Event [Line Items]
Debt instrument, term	364 days
Debt instrument, face amount	$ 6,200
Subsequent Event \| Bridge Facility \| Bridge Loan \| Minimum
Subsequent Event [Line Items]
Debt instrument, face amount	$ 0

Per share price of saleable stock paid or offered to be paid by acquirer in business combination.

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