Collaborative and Other Relationships - Profit Sharing (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Apr. 30, 2023	Mar. 31, 2023
RITUXAN
Collaborative arrangements and non-collaborative arrangement transactions
Percentage of co promotion operating profits first fifty million	30.00%
After First Threshold Date until the Second Threshold Date	35.00%
After LUNSUMIO Approval until the First Threshold Date	37.50%
GAZYVA
Collaborative arrangements and non-collaborative arrangement transactions
Pre-tax profit share threshold	$ 50.0
Limit of gross sale of GAZYVA to be achieved in preceding 12 months under option one	500.0
Sales trigger gross sales threshold	350.0
Limit of gross sale of GAZYVA to be achieved in any 12 months under option two	$ 500.0
After First Threshold Date until the Second Threshold Date	35.00%	35.00%	37.50%
LUNSUMIO
Collaborative arrangements and non-collaborative arrangement transactions
Pre-tax profit share threshold	$ 50.0