Revenue Recognition - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) term course	Dec. 31, 2024 USD ($)
Disaggregation of Revenue [Line Items]
Number of free courses | course	1
Number of successfully completed courses | course	3
Consecutive terms of non attendance in which Graduation Fund credits will be lost | term	1
Contract liabilities, tuition cap	$ 15.6	$ 14.7
Learn and Earn Scholarship | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Disaggregation of Revenue [Line Items]
Performance obligation expected timing of satisfaction	12 months
Revenue remaining performance obligation	$ 15.9
Tuition Cap | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Disaggregation of Revenue [Line Items]
Performance obligation expected timing of satisfaction	12 months
Revenue remaining performance obligation	$ 5.9
Minimum | Learn and Earn Scholarship | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Disaggregation of Revenue [Line Items]
Performance obligation expected timing of satisfaction	2 years
Minimum | Australia / New Zealand
Disaggregation of Revenue [Line Items]
Deferred contract costs, amortization period	1 year
Maximum | Learn and Earn Scholarship | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Disaggregation of Revenue [Line Items]
Performance obligation expected timing of satisfaction	4 years
Maximum | Australia / New Zealand
Disaggregation of Revenue [Line Items]
Deferred contract costs, amortization period	2 years