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v3.20.2

Debt - Unamortized Discount and Debt Issuance Costs (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Mar. 31, 2020 | May 31, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total unamortized discount | $ (641.6) | $ (1,043.2) |
Total debt issuance costs | (49.2) | (67.9) |
Bridge Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | 0.0 | (3.1) |
Total debt issuance costs | 0.0 | (3.1) |
Senior Indebtedness |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount |  |  | $ (10.5)
Total debt issuance costs |  |  | $ (24.4)
Senior Indebtedness | 4.333% 2023 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (2.9) | (3.5) |
Total debt issuance costs | (6.6) | (7.7) |
Senior Indebtedness | 3.922% 2021 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (1.2) | (2.1) |
Total debt issuance costs | (2.7) | (4.8) |
Senior Indebtedness | 2.670% 2023 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (2.7) | 0.0 |
Total debt issuance costs | (1.6) | 0.0 |
Senior Indebtedness | 4.250% 2025 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (14.2) | 0.0 |
Total debt issuance costs | (1.9) | 0.0 |
Senior Convertible Debt | 2017 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (239.0) | (504.2) |
Total debt issuance costs | (6.1) | (13.0) |
Senior Convertible Debt | 2015 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (49.4) | (192.9) |
Total debt issuance costs | (1.8) | (7.0) |
Junior Convertible Debt | 2017 Junior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total unamortized discount | (332.2) | (337.4) |
Total debt issuance costs | $ (3.0) | $ (3.1) |

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