Reclassifications out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (386,735)		$ (598,148)		$ (386,735)		$ (598,148)		$ (310,859)	$ (320,710)	$ (388,373)	$ (209,808)
Other Comprehensive Income (Loss), Net of Tax		(75,601)		(209,653)		(65,390)		(388,093)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(275)		(122)	[1]	(635)		(247)
Total other comprehensive (loss) income		(75,876)		(209,775)		(66,025)		(388,340)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax		129		1,332		129		1,332		70	12	1,305	1,276
Other Comprehensive Income (Loss), Net of Tax		334		149		752		303
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[2]	(275)		(122)		(635)		(247)
Total other comprehensive (loss) income		59		27		117		56
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		(386,864)		(599,480)		(386,864)		(599,480)		$ (310,929)	$ (320,722)	$ (389,678)	$ (211,084)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(75,935)		(209,802)		(66,142)		(388,396)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	[1]	0		0	[1]	0	[1]
Total other comprehensive (loss) income		$ (75,935)		$ (209,802)		$ (66,142)		$ (388,396)

[1] The effective portion of gain or loss on net debt designated as non-derivative net investment hedging instruments is recognized in Accumulated Other Comprehensive Income and is reclassified to income in the same period when a gain or loss related to the net investment is included in income.

[2] The amortization (gain) of defined benefit pension items is reported in the Interest and miscellaneous (income) expense line of our Consolidated Statements of Income (Loss).