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v3.23.1

Debt - Debt Obligations (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Mar. 31, 2022
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Debt Instrument [Line Items] |  |
Long-term debt | $ 6,466.6 | $ 7,837.2
Less: Debt discount | (10.4) | (124.6)
Less: Debt issuance costs | (16.3) | (25.2)
Net long-term debt including current maturities | 6,439.9 | 7,687.4
Less: Current maturities | (1,398.2) | 0.0
Net long-term debt | 5,041.7 | 7,687.4
Senior Indebtedness |  |
Debt Instrument [Line Items] |  |
Long-term debt | 5,700.0 | 6,999.1
Line of Credit | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Long-term debt | 100.0 | 1,399.1
Less: Debt issuance costs | $ (8.6) | (10.6)
Senior Indebtedness | 4.333% 2023 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 4.333% |
Effective Interest Rate | 4.70% |
Long-term debt | $ 1,000.0 | 1,000.0
Less: Debt discount | (0.2) | (1.3)
Less: Debt issuance costs | $ (0.4) | (2.9)
Senior Indebtedness | 2.670% 2023 Notes |  |
Debt Instrument [Line Items] |  |
Coupon Interest Rate | 2.67% |
Effective Interest Rate | 2.80% |
Long-term debt | $ 1,000.0 | 1,000.0
Less: Debt discount | (0.4) | (1.3)
Less: Debt issuance costs | $ (0.2) | (0.8)
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 | (1.2) | (2.5)
Less: Debt issuance costs | $ (0.6) | (1.3)
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 | (1.3) | (2.2)
Less: Debt issuance costs | $ (0.8) | (1.4)
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 | (7.3) | (10.2)
Less: Debt issuance costs | (0.9) | (1.3)
Convertible Debt |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 766.6 | 838.1
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 | $ 12.4 | 34.4
Less: Debt discount | 0.0 | (3.7)
Less: Debt issuance costs | $ 0.0 | (0.1)
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 | $ 82.2 | 128.1
Less: Debt discount | 0.0 | (23.4)
Less: Debt issuance costs | $ (0.4) | (0.6)
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 discount | 0.0 | (75.3)
Less: Debt issuance costs | $ (4.4) | (6.2)
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 | $ 6.5 | 10.1
Less: Debt discount | $ 0.0 | $ (4.7)

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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