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Recent Accounting Pronouncements - Cumulative Effect of Changes Due to Adoption of ASU 2014-09 (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
ASSETS |  |  |
Other current assets | $ 37.8 | $ 22.1 | $ 22.4
Property and equipment, net | 866.5 | 782.8 | 757.5
LIABILITIES |  |  |
Accrued expense | 78.0 | 93.6 | 89.8
Other liabilities | 38.1 | 37.2 | 15.7
SHAREHOLDERS' EQUITY |  |  |
Retained earnings | $ 457.8 | 473.9 | $ 474.2
Accounting Standards Update 2016-02 |  |  |
ASSETS |  |  |
Other current assets |  | (0.3) |
Property and equipment, net |  | 25.3 |
LIABILITIES |  |  |
Accrued expense |  | 3.8 |
Other liabilities |  | 21.5 |
SHAREHOLDERS' EQUITY |  |  |
Retained earnings |  | $ (0.3) |

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