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Shareholders' Equity - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Aug. 31, 2019 | Aug. 03, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Net earnings, net of tax, attributable to noncontrolling interests | $ 5.4 | $ 20.5 |  |
Shares authorized to be repurchased (in shares) |  |  | 6,000,000.0 | 6,000,000.0
Shares repurchased (in shares) |  | 900,000 |  |
Total cost of shares repurchased |  | $ 63.8 |  |
August 2019 Authorization |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) | 1,100,000 | 100,000 |  |
Total cost of shares repurchased | $ 100.1 |  |  |
Shares remaining authorized for repurchase (in shares) | 2,300,000 |  |  |
August 2018 Authorization |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) |  | 800,000 |  |
Shares remaining authorized for repurchase (in shares) | 0 |  |  |
Non-Controlling Interests |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Net earnings, net of tax, attributable to noncontrolling interests | $ 0.9 | $ 0.6 |  |

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