Business Segments Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	$ 578,797	$ 578,079
Intangible assets
Indefinite-lived	2,481,590	2,281,988
Finite-lived, net	208,330	193,741
Intangible assets, net	2,689,920	2,475,729
Total	3,268,717	3,053,808
North American OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	548,401	546,643
Intangible assets
Indefinite-lived	2,399,717	2,195,617
Finite-lived, net	205,267	190,462
Intangible assets, net	2,604,984	2,386,079
Total	3,153,385	2,932,722
International OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	30,396	31,436
Intangible assets
Indefinite-lived	81,873	86,371
Finite-lived, net	3,063	3,279
Intangible assets, net	84,936	89,650
Total	$ 115,332	$ 121,086

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

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