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v3.22.2.2

Stockholders' Equity - Additional Information (Detail) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2022 USD ($) Transaction item shares | Mar. 31, 2022 USD ($) shares | Mar. 31, 2021 USD ($) shares | Sep. 30, 2022 shares
Kronos Worldwide, Inc. |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Shares acquired |  | 73,881 |  |
Shares acquired, value | $ |  | $ 1.1 |  |
Shares available for purchase |  |  |  | 1,500,000
CompX |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Shares available for purchase |  |  |  | 500,000
NL |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Common stock, Repurchased | 2,000 |  |  |
Shares Repurchased in Market Transaction | CompX |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Common stock, Repurchased | 70,000 |  |  |
Shares Repurchased from Affiliates |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Number of affiliates | item | 2 |  |  |
Number of private transactions | Transaction | 2 |  |  |
Shares Repurchased from Affiliates | CompX |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Common stock, Repurchased | 8,900 |  |  |
Class A | CompX |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Common stock, Repurchased | 78,900 |  | 50,000 |
Stock repurchase, aggregate purchase price | $ | $ 1.7 |  | $ 0.8 |

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