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v3.21.2

Shareholders' Equity and Noncontrolling Interests, Stock Repurchase (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 27, 2021 | Apr. 24, 2018 | Oct. 26, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | May 21, 2021
Shareholders' Equity |  |  |  |  |  |  |  |
Treasury stock retired (in dollars) |  |  |  | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |
Payments for shares repurchased and retained in treasury (in dollars) |  |  |  | $ 170.9 | $ 201.9 | $ 491.0 | $ 459.2 |
Class A Common Stock, par value (in dollars per share) |  |  |  | $ 0.001 |  | $ 0.001 |  |
Class A Common Stock, shares authorized |  |  |  |  |  |  |  | 2,000,000,000
Increase in common stock shares authorized |  |  |  |  |  |  |  | 1,000,000,000
2021 Stock Repurchase Program |  |  |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |  |  |
Value of shares authorized to be repurchased (in dollars) | $ 2,000.0 |  |  |  |  |  |  |
Repurchase of stock program, period | 3 years |  |  |  |  |  |  |
Number of shares repurchased and retired |  |  |  | 2,300,000 |  | 4,100,000 |  |
Payments for shares repurchased and retired (in dollars) |  |  |  | $ 170.9 |  | $ 287.2 |  |
2018 Stock Repurchase Program |  |  |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |  |  |
Value of shares authorized to be repurchased (in dollars) |  | $ 2,000.0 |  |  |  |  |  |
Repurchase of stock program, period |  | 3 years |  |  |  |  |  |
Number of shares repurchased |  |  |  |  | 3,700,000 | 3,100,000 | 9,100,000 |
Payments for shares repurchased (in dollars) |  |  |  |  | $ 201.9 | $ 203.8 | $ 459.2 |
Number of shares repurchased and retained in treasury |  |  |  |  |  | 300,000 | 2,000,000.0 |
Payments for shares repurchased and retained in treasury (in dollars) |  |  |  |  |  | $ 19.8 | $ 110.3 |
Number of shares repurchased and retired |  |  |  |  |  | 2,800,000 | 7,100,000 |
Payments for shares repurchased and retired (in dollars) |  |  |  |  |  | $ 184.0 | $ 348.9 |
Subsequent Event | 2021 Stock Repurchase Program |  |  |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |  |  |
Number of shares repurchased and retained in treasury |  |  | 600,000 |  |  |  |  |
Payments for shares repurchased and retained in treasury (in dollars) |  |  | $ 46.1 |  |  |  |  |
Value of shares remaining that may be repurchased under the stock repurchase program (in dollars) |  |  | $ 1,666.6 |  |  |  |  |

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