CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net (loss) income	$ (18,600,000)	$ 129,300,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	171,100,000	188,700,000
Deferred income taxes	(3,000,000.0)	(8,100,000)
Share-based compensation expense related to equity incentive plans	52,900,000	44,000,000.0
Amortization of debt discount	1,400,000	16,600,000
Amortization of debt issuance costs	1,400,000	2,000,000.0
Impairment of intangible assets	2,200,000	0
Other	(600,000)	(18,400,000)
Changes in operating assets and liabilities, excluding impact of acquisitions:
(Increase) decrease in accounts receivable	(75,800,000)	47,900,000
Decrease in inventories	125,000,000.0	9,200,000
Increase (decrease) in accounts payable and accrued liabilities	27,600,000	(41,200,000)
Change in other assets and liabilities	(3,400,000)	(20,700,000)
Change in income tax payable	(4,600,000)	27,800,000
Net cash provided by operating activities	275,600,000	377,100,000
Cash flows from investing activities:
Proceeds from capital-related government incentives	4,800,000	100,000
Investments in other assets	(23,800,000)	(52,700,000)
Capital expenditures	(17,900,000)	(72,900,000)
Net cash used in investing activities	(36,900,000)	(125,500,000)
Cash flows from financing activities:
Proceeds from issuance of Commercial Paper	0	3,573,400,000
Repayments of Commercial Paper	(174,100,000)	(4,637,500,000)
Proceeds from issuance of convertible debt	0	1,250,000,000
Deferred financing costs	0	(15,600,000)
Purchase of capped call options	0	(105,000,000.0)
Proceeds from sale of common stock	12,400,000	13,100,000
Tax payments related to shares withheld for vested RSUs	(8,400,000)	(18,900,000)
Repurchase of common stock	0	(72,700,000)
Payment of cash dividends on Series A Preferred Stock	(25,100,000)	0
Payment of cash dividends on common stock	(245,500,000)	(242,600,000)
Capital lease payments	(400,000)	(400,000)
Other Financing	(2,800,000)	0
Net cash used in financing activities	(443,900,000)	(256,200,000)
Net decrease in cash and cash equivalents	(205,200,000)	(4,600,000)
Cash and cash equivalents, at beginning of period	771,700,000	319,700,000
Cash and cash equivalents, at end of period	$ 566,500,000	$ 315,100,000