Business Segments Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	$ 577,840	$ 578,079
Intangible assets
Indefinite-lived	2,280,845	2,281,988
Finite-lived, net	188,869	193,741
Intangible assets, net	2,469,714	2,475,729
Total	3,047,554	3,053,808
North American OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	546,643	546,643
Intangible assets
Indefinite-lived	2,195,617	2,195,617
Finite-lived, net	185,677	190,462
Intangible assets, net	2,381,294	2,386,079
Total	2,927,937	2,932,722
International OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	31,197	31,436
Intangible assets
Indefinite-lived	85,228	86,371
Finite-lived, net	3,192	3,279
Intangible assets, net	88,420	89,650
Total	$ 119,617	$ 121,086

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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