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Segment Information - Additional Information (Detail) - USD ($) $ in Millions | Mar. 31, 2024 | Mar. 31, 2023
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Located outside the United States [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets located outside the United States | $ 2,000.0 | $ 262.4
United Kingdom [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets located outside the United States | $ 1,300.0 |

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |