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Share repurchases (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
May 08, 2025 | May 12, 2025 | Mar. 31, 2025 | Mar. 31, 2024 | Sep. 05, 2024
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Repurchase of common stock (in shares) |  |  | 3,660 | 2,119 |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 550,222 | $ 240,117 |
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 148.94 | $ 112.76 |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 2,000,000
Open Market Purchases |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Repurchase of common stock (in shares) |  |  | 3,457 | 2,119 |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 518,221 | $ 240,117 |
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 148.53 | $ 112.76 |
Berkshire Repurchases |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Repurchase of common stock (in shares) |  |  | 203 | 0 |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 32,001 | $ 0 |
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 156.01 | $ 0 |
Subsequent Event |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Repurchase of common stock (in shares) |  | 1,730 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  | $ 259,152 |  |  |
Treasury Stock Acquired, Average Cost Per Share |  | $ 148.34 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 1,132,566 |  |  |
Subsequent Event | Berkshire |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Repurchase of common stock (in shares) | 1,146 |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ 170,263 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 147.11 |  |  |  |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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