Schedule of Stock Repurchase Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Shares repurchased	424,452		0	484,734	0
Average price per share	$ 264.10		$ 0	$ 261.20	$ 0
Value of shares repurchased (in millions)	$ 112,106	$ 14,517	$ 0	$ 126,600	$ 0

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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