Additional Financial Information - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ (1,150.2)	$ (778.9)
Other comprehensive income (loss)	(10.5)	19.2
Reclassifications to net loss	(21.4)	(23.5)
Ending balance	(1,049.8)	(991.5)
Income tax expense (benefit) reflected in other comprehensive income	0.0	0.0
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(42.1)	(41.1)
Other comprehensive income (loss)	(12.8)	1.8
Reclassifications to net loss	0.0	0.0
Ending balance	(54.9)	(39.3)
Net unrealized gain (loss) on cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	138.8	142.6
Other comprehensive income (loss)	2.3	17.4
Reclassifications to net loss	(21.4)	(23.5)
Ending balance	119.7	136.5
Net unrealized gain (loss) on cash flow hedges | Direct Operating Expense
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications to net loss	1.2	2.5
Net unrealized gain (loss) on cash flow hedges | Interest Expense
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications to net loss	(22.6)	(26.0)
Accumulated Other Comprehensive Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	96.7	101.5
Ending balance	$ 64.8	$ 97.2