Other Assets - Additional Information (Detail) - Shockwave Medical - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Sale of stock				1.4
Cash proceeds from sale of stock				$ 67.9
Total realized gain (loss) from sale of stock				47.3
Other Income (Expense)
Goodwill [Line Items]
Unrealized gain (loss) recorded in other income	$ 8.2	$ 8.3	$ 14.3	$ 43.0