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Leases (Balance Sheet Information, Leases) (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Mar. 31, 2019
--- | --- | ---
Operating Leases |  |
Operating Leases, Right-of-use assets | $ 151.5 | $ 0.0
Operating Lease, Liabilities | 179.9 |
Finance Leases |  |
Finance Lease, Liabilities | $ 44.7 | $ 45.4
Operating leases, weighted average remaining lease term | 6 years 8 months 12 days |
Finance leases, weighted average remaining lease term | 21 years 10 months 24 days |
Operating leases, weighted average discount rate, percent | 4.11% |
Finance leases, weighted average discount rate, percent | 6.42% |
Other Non-Current Assets |  |
Operating Leases |  |
Operating Leases, Right-of-use assets | $ 151.5 |
Accounts Payable and Accrued Liabilities |  |
Operating Leases |  |
Operating Leases, Liabilities, current | 29.0 |
Other Non-Current Liabilities |  |
Operating Leases |  |
Operating Leases, Liabilities, non-current | 150.9 |
Property and equipment, net |  |
Finance Leases |  |
Finance Leases, Right-of-Use assets | 49.5 |
Debt - short-term portion |  |
Finance Leases |  |
Finance Lease, Liabilities, Current | 3.0 |
Debt - non-current |  |
Finance Leases |  |
Finance Lease, Liabilities, Non-current | $ 41.7 |

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