Business Segments (Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	$ 578,309	$ 578,583
Intangible assets
Indefinite-lived	2,272,294	2,273,191
Finite-lived, net	229,064	234,019
Intangible assets, net	2,501,358	2,507,210
Total	3,079,667	3,085,793
North American OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	547,393	547,393
Intangible assets
Indefinite-lived	2,195,617	2,195,617
Finite-lived, net	223,961	228,743
Intangible assets, net	2,419,578	2,424,360
Total	2,966,971	2,971,753
International OTC Healthcare
Segment Reporting, Asset Reconciling Item [Line Items]
Goodwill	30,916	31,190
Intangible assets
Indefinite-lived	76,677	77,574
Finite-lived, net	5,103	5,276
Intangible assets, net	81,780	82,850
Total	$ 112,696	$ 114,040

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

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

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