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Shareholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 10, 2019 | May 04, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Aug. 31, 2019 | Aug. 31, 2018 | Jul. 31, 2016
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Interest and other (income) expenses, net |  |  | $ (70.2) | $ 10.5 | $ (58.3) | $ 26.6 |  |  |
Dividends declared (in dollars per share) | $ 1.09 | $ 1.01 |  |  |  |  |  |  |
Dividends paid date |  |  |  |  | Jun. 14, 2019 | Jun. 15, 2018 |  |  |
Dividends record date |  |  |  |  | Jun. 03, 2019 | Jun. 01, 2018 |  |  |
Total cost of shares repurchased |  |  |  |  | $ 101.0 | $ 113.2 |  |  |
Common Stock Repurchase 2019 Authorization | Scenario Forecast |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized to be repurchased (in shares) |  |  |  |  |  |  | 6,000,000.0 |  |
Common Stock Repurchase 2018 Authorization |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized to be repurchased (in shares) |  |  |  |  |  |  |  | 6,000,000.0 |
Shares repurchased during period (in shares) |  |  |  |  | 1,200,000 |  |  |  |
Total cost of shares repurchased |  |  |  |  | $ 101.0 |  |  |  |
Shares remaining authorized for repurchase (in shares) |  |  | 1,900,000 |  | 1,900,000 |  |  |  |
2016 Authorization |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized to be repurchased (in shares) |  |  |  |  |  |  |  |  | 6,000,000.0
Shares repurchased during period (in shares) |  |  |  |  |  | 1,000,000.0 |  |  |
Total cost of shares repurchased |  |  |  |  |  | $ 113.2 |  |  |
Shares remaining authorized for repurchase (in shares) |  |  | 0 |  | 0 |  |  |  |
Non-Controlling Interests |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Interest and other (income) expenses, net |  |  | $ 0.1 | $ 1.0 | $ 1.1 | $ 2.2 |  |  |

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