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Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |
Aggregate common stock and preferred stock authorized | 300,000,000 |  |
Common stock, authorized | 250,000,000.0 |  |
Common stock, par value | $ 1 |  |
Preferred Stock, authorized | 50,000,000 |  |
Preferred Stock, outstanding | 0 |  |
Dividends declared per common share | $ 0.880 | $ 0.676 | $ 0.588
Cost of shares repurchased | $ 116.5 | $ 84.2 | $ 41.4
Settlement of Tax Withholding on Employee Equity Compensation [Member] |  |  |
Class of Stock [Line Items] |  |  |
Shares repurchased | 100,000 | 200,000 | 300,000
Cost of shares repurchased | $ 11.7 | $ 11.0 | $ 12.7
2019 Share Repurchase Program |  |  |
Class of Stock [Line Items] |  |  |
Shares repurchased | 1,200,000 | 1,700,000 | 500,000
Cost of shares repurchased | $ 104.8 | $ 73.2 | $ 28.7
Share repurchase program | 500.0 |  |
2006 Share Repurchase Program [Member] |  |  |
Class of Stock [Line Items] |  |  |
Share repurchase program | $ 1,000.0 |  |

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