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Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Income - ATM Program - Additional Information (Details) - ATM Program - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2019
Class Of Stock [Line Items] |  |
Issuance of ordinary shares (in shares) | 1,696,516 | 2,667,351
Gross proceeds | $ 48.0 | $ 76.2
Weighted Average Share Price | $ 28.29 | $ 28.58
Proceeds from stock plans net of issuance costs | $ 47.3 | $ 75.1
Purchase new program included an optional forward purchase component | $ 250.0 |

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