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Changes in Other Comprehensive Loss (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2020
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	$ (92,908)	$ (114,350)
Other comprehensive income (loss) before reclassification	2,776	(475)
Amounts reclassified from other comprehensive loss	6,252	30,945
Net current period other comprehensive income (loss)	9,028	30,470
Ending balance net of tax	(83,880)	(83,880)
Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(67,101)	(79,041)
Other comprehensive income (loss) before reclassification	(823)	(5,039)
Amounts reclassified from other comprehensive loss	535	16,691
Net current period other comprehensive income (loss)	(288)	11,652
Ending balance net of tax	(67,389)	(67,389)
Foreign currency exchange (gain) loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(24,926)	(34,359)
Other comprehensive income (loss) before reclassification	9,216	18,649
Amounts reclassified from other comprehensive loss	0
Net current period other comprehensive income (loss)	9,216	18,649
Ending balance net of tax	(15,710)	(15,710)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	7,383	18,409
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	5,717	14,254
Tax expense | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(150)	(4,668)
Tax expense | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(1,666)	(4,155)
Cost of products sold | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	685	21,359
Cost of products sold | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(6)	(107)
Interest Expense [Member] | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	520	1,408
Foreign currency exchange (gain) loss | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	6,869	17,108
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(881)	(950)
Other comprehensive income (loss) before reclassification	(5,617)	(14,085)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	5,717	14,254
Net current period other comprehensive income (loss)	100	169
Ending balance net of tax	$ (781)	$ (781)

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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