v3.26.1
Summary of Material Accounting Policies - Additional Information (Detail)
 12 Months Ended
Mar. 31, 2026
Summary Of Significant Accounting Policies [Line items]  
Number of days for a financial asset to become past due for determining credit impairment 90 days
Bottom of range [member]  
Summary Of Significant Accounting Policies [Line items]  
Percentage of interest in associate 20.00%
Bottom of range [member] | Customer-related intangible assets [member]  
Summary Of Significant Accounting Policies [Line items]  
Other intangible assets useful lives 5 years
Bottom of range [member] | Buildings [member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 7 years
Bottom of range [member] | Right of use assets [member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 1 year
Bottom of range [member] | Assets For Rent And Others [Member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 2 years
Bottom of range [member] | Software [member]  
Summary Of Significant Accounting Policies [Line items]  
Other intangible assets useful lives 5 years
Top of range [member]  
Summary Of Significant Accounting Policies [Line items]  
Percentage of interest in associate 50.00%
Top of range [member] | Customer-related intangible assets [member]  
Summary Of Significant Accounting Policies [Line items]  
Other intangible assets useful lives 20 years
Top of range [member] | Buildings [member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 69 years
Top of range [member] | Right of use assets [member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 28 years
Top of range [member] | Assets For Rent And Others [Member]  
Summary Of Significant Accounting Policies [Line items]  
Property plant and equipment useful lives 40 years
Top of range [member] | Software [member]  
Summary Of Significant Accounting Policies [Line items]  
Other intangible assets useful lives 10 years