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v3.23.3

Debt - Debt Obligations (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Mar. 31, 2023
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term debt | $ 6,099.2 | $ 6,466.6
Less: Debt discount | (10.6) | (10.4)
Less: Debt issuance costs | (12.8) | (16.3)
Net long-term debt including current maturities | 6,075.8 | 6,439.9
Less: Current maturities | (1,661.1) | (1,398.2)
Net long-term debt | 4,414.7 | 5,041.7
Senior Indebtedness |  |
Debt Instrument [Line Items] |  |
Long-term debt | 5,389.0 | 5,700.0
Line of Credit | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Long-term debt | 39.0 | 100.0
Less: Debt issuance costs | (7.1) | (8.6)
Line of Credit | Term Loan Facility |  |
Debt Instrument [Line Items] |  |
Long-term debt | 750.0 | 0.0
Less: Debt issuance costs | $ (0.9) | 0.0
Senior Indebtedness | 4.333% 2023 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 4.333% |
Effective Interest Rate | 4.70% |
Long-term debt | $ 0.0 | 1,000.0
Less: Debt discount | 0.0 | (0.2)
Less: Debt issuance costs | $ 0.0 | (0.4)
Senior Indebtedness | 2.670% 2023 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 2.67% |
Effective Interest Rate | 2.80% |
Long-term debt | $ 0.0 | 1,000.0
Less: Debt discount | 0.0 | (0.4)
Less: Debt issuance costs | $ 0.0 | (0.2)
Senior Indebtedness | 0.972% 2024 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 0.972% |
Effective Interest Rate | 1.10% |
Long-term debt | $ 1,400.0 | 1,400.0
Less: Debt discount | (0.5) | (1.2)
Less: Debt issuance costs | $ (0.3) | (0.6)
Senior Indebtedness | 0.983% 2024 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 0.983% |
Effective Interest Rate | 1.10% |
Long-term debt | $ 1,000.0 | 1,000.0
Less: Debt discount | (0.9) | (1.3)
Less: Debt issuance costs | $ (0.4) | (0.8)
Senior Indebtedness | 4.250% 2025 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 4.25% |
Effective Interest Rate | 4.60% |
Long-term debt | $ 1,200.0 | 1,200.0
Less: Debt discount | (5.9) | (7.3)
Less: Debt issuance costs | (0.8) | (0.9)
Convertible Debt |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 710.2 | 766.6
Senior Subordinated Convertible Debt | 2015 Senior Convertible Debt |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 1.625% |
Effective Interest Rate | 1.80% |
Long-term debt | $ 6.7 | 12.4
Senior Subordinated Convertible Debt | 2017 Senior Convertible Debt |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 1.625% |
Effective Interest Rate | 1.80% |
Long-term debt | $ 38.0 | 82.2
Less: Debt issuance costs | $ (0.2) | (0.4)
Senior Subordinated Convertible Debt | 2020 Senior Convertible Debt |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 0.125% |
Effective Interest Rate | 0.50% |
Long-term debt | $ 665.5 | 665.5
Less: Debt issuance costs | $ (3.1) | (4.4)
Junior Subordinated Convertible Debt | 2017 Junior Convertible Debt |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 2.25% |
Effective Interest Rate | 2.30% |
Long-term debt | $ 0.0 | 6.5
Commercial Paper |  |
Debt Instrument [Line Items] |  |
Long-term debt | 1,000.0 | 0.0
Less: Debt discount | $ (3.3) | $ 0.0

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