| Financial Assets And Liabilities Measured At Fair Value On Recurring Basis [Table Text Block] |
At June 30, 2026 and 2025, and at March 31, 2026, the Company had certain financial assets and financial liabilities that were required to be measured and reported at fair value on a recurring basis. These assets and liabilities are listed in the tables below and are classified based on how their values were determined under the fair value hierarchy or the NAV practical expedient: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | | | | Fair Value Hierarchy | | | | (in thousands of dollars) | | NAV | | Level 1 | | Level 2 | | Level 3 | | Total | | | | | | | | | | | | | Assets | | | | | | | | | | | Money market funds | | $ | 13 | | | $ | — | | | $ | — | | | $ | — | | | $ | 13 | | Trading securities associated with deferred compensation plans | | — | | | 13,007 | | | — | | | — | | | 13,007 | | Interest rate swap agreements | | — | | | — | | | 5,014 | | | — | | | 5,014 | | Foreign currency exchange contracts | | — | | | — | | | 144 | | | — | | | 144 | | Total financial assets measured and reported at fair value | | $ | 13 | | | $ | 13,007 | | | $ | 5,158 | | | $ | — | | | $ | 18,178 | | | | | | | | | | | | | | Liabilities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Foreign currency exchange contracts | | $ | — | | | $ | — | | | $ | 4,222 | | | $ | — | | | $ | 4,222 | | Total financial liabilities measured and reported at fair value | | $ | — | | | $ | — | | | $ | 4,222 | | | $ | — | | | $ | 4,222 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2025 | | | | | Fair Value Hierarchy | | | | (in thousands of dollars) | | NAV | | Level 1 | | Level 2 | | Level 3 | | Total | | | | | | | | | | | | | Assets | | | | | | | | | | | Money market funds | | $ | 149 | | | $ | — | | | $ | — | | | $ | — | | | $ | 149 | | Trading securities associated with deferred compensation plans | | — | | | 12,078 | | | — | | | — | | | 12,078 | | | | | | | | | | | | | Foreign currency exchange contracts | | — | | | — | | | 2,787 | | | — | | | 2,787 | | Total financial assets measured and reported at fair value | | $ | 149 | | | $ | 12,078 | | | $ | 2,787 | | | $ | — | | | $ | 15,014 | | | | | | | | | | | | | | Liabilities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Interest rate swap agreements | | $ | — | | | $ | — | | | $ | 602 | | | $ | — | | | $ | 602 | | Foreign currency exchange contracts | | — | | | — | | | 1,931 | | | — | | | 1,931 | | Total financial liabilities measured and reported at fair value | | $ | — | | | $ | — | | | $ | 2,533 | | | $ | — | | | $ | 2,533 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | | | | Fair Value Hierarchy | | | | (in thousands of dollars) | | NAV | | Level 1 | | Level 2 | | Level 3 | | Total | | | | | | | | | | | | | Assets | | | | | | | | | | | Money market funds | | $ | 10 | | | $ | — | | | $ | — | | | $ | — | | | $ | 10 | | Trading securities associated with deferred compensation plans | | — | | | 11,630 | | | — | | | — | | | 11,630 | | Interest rate swap agreements | | — | | | — | | | 953 | | | — | | | 953 | | Foreign currency exchange contracts | | — | | | — | | | 765 | | | — | | | 765 | | Total financial assets measured and reported at fair value | | $ | 10 | | | $ | 11,630 | | | $ | 1,718 | | | $ | — | | | $ | 13,358 | | | | | | | | | | | | | | Liabilities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Foreign currency exchange contracts | | $ | — | | | $ | — | | | $ | 594 | | | $ | — | | | $ | 594 | | Total financial liabilities measured and reported at fair value | | $ | — | | | $ | — | | | $ | 594 | | | $ | — | | | $ | 594 | |
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| Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
The following table summarizes the fair and carrying value of the Company’s long-term debt, and if applicable any current portion, at each of the balance sheet dates June 30, 2026, and 2025 and March 31, 2026: | | | | | | | | | | | | | | | | | | | (in millions of dollars) | June 30, 2026 | | June 30, 2025 | | March 31, 2026 | | Fair market value of long term obligations | $ | 613 | | | $ | 618 | | | $ | 615 | | | Carrying value of long term obligations | $ | 620 | | | $ | 620 | | | $ | 620 | |
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