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v3.19.3.a.u2

General (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2019 | Apr. 01, 2019 | Mar. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating Lease, Liabilities | $ 167.4 |  | $ 167.4 |  |
Operating Leases, Right-of-use assets | 140.3 |  | 140.3 |  | $ 0.0
Accounting for Leases |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating Lease, Liabilities |  |  |  | $ 187.2 |
Operating Leases, Right-of-use assets |  |  |  | 157.4 |
Lease Incentives |  |  |  | $ 29.8 |
Customer relationships |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Finite-lived intangible assets | 1,500.0 |  | 1,500.0 |  |
Finite-Lived Intangible Asset, Useful Life |  | 17 years |  |  |
Intangible Assets, Amortization Period |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Increase in amortization expense | $ 12.2 |  | $ 23.5 |  |
Decrease in earnings per share, basic and diluted (in usd per share) | $ 0.06 |  | $ 0.11 |  |

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