Revenue - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Payment terms for customers, lower range	30 days
Payment term for customers, upper range	120 days
Total	$ 173.0
Unearned revenue and customer deposits	47.6	$ 46.7
Other Current Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Unearned revenue and customer deposits	4.2	4.1
Other Noncurrent Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities, recognized, noncurrent	$ 78.9	$ 79.5
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	1 year
SEA-US contract term	15 years
Indefeasible right of use of contract term	15 years
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	5 years
SEA-US contract term	25 years
Indefeasible right of use of contract term	25 years
Indefeasible Right of Use, Maximum, in Years	30 years