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Goodwill and Intangible Assets - Summary of Estimated Remaining Amortization Period for Intangible Assets Acquired on Acquisition (Detail)
Mar. 31, 2018
yr
Promax Applications Group [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 4.25
ATCO I-Tek [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 6.50
Bottom of range [member] | Global oil and gas information technology [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.25
Bottom of range [member] | Opus Capital Markets Consultants LLC [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 0.75
Bottom of range [member] | Designit AS [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 0.25
Bottom of range [member] | Cellent AG [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.75
Bottom of range [member] | HPH Holdings Corp [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 1
Bottom of range [member] | Appirio Inc [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.50
Bottom of range [member] | Other Entities [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.00
Top of range [member] | Global oil and gas information technology [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 3.25
Top of range [member] | Opus Capital Markets Consultants LLC [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.75
Top of range [member] | Designit AS [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 2.25
Top of range [member] | Cellent AG [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 4.75
Top of range [member] | HPH Holdings Corp [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 5
Top of range [member] | Appirio Inc [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 8.50
Top of range [member] | Other Entities [member]  
Disclosure of intangible assets material to entity [line items]  
Remaining amortization period for intangible assets 14.25