Balance Sheet Information - Lease expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Operating lease	$ 48.0	$ 47.8	$ 39.7
Variable lease	5.1	9.8	3.8
Short-term lease	1.7	2.6	2.0
Total lease expense	54.8	60.2	$ 45.5
Operating lease liabilities included in:
Accrued expenses and other current liabilities	33.0	35.2
Other long-term liabilities	231.0	246.5
Lease liabilities	$ 264.0	$ 281.7
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating lease assets	$ 247.3	$ 262.1
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current	Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent