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Stockholders' Equity - Repurchase of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Aug. 02, 2021 | May 31, 2018 | Mar. 31, 2017 | Jul. 31, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 1,000.0 |  | $ 1,500.0 | $ 1,500.0
Stock repurchase program, remaining authorizations | $ 536.5 |  | $ 536.5 |  |  |  |  |
Number of shares repurchased (in shares) | 0 | 614,190 | 1,529,575 | 4,527,887 |  |  |  |
Value of shares repurchased |  | $ 30.0 | $ 79.8 | $ 280.1 |  |  |  |
Shares acquired, average price per share (in usd per share) |  | $ 48.81 | $ 52.20 | $ 61.86 |  |  |  |
New Share Repurchase Program |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 1,000.0 |  |

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
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