Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018	May 31, 2017	May 31, 2009
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses	$ 156,300,000
Impairment losses	0	$ 0	$ 0
Intangible asset amortization expense	45,600,000	45,100,000	43,200,000
Future amortization expense of intangible asset in 2021	42,100,000
Future amortization expense of intangible asset in 2022	40,800,000
Future amortization expense of intangible asset in 2023	37,100,000
Future amortization expense of intangible asset in 2024	33,900,000
Future amortization expense of intangible asset in 2025	29,100,000
Accumulated intangible asset impairment losses, gross	61,800,000
Other intangible asset impairment losses		4,200,000	$ 0
SPG Segments
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses				$ 141,400,000
SPG Segments | Customer-related Intangibles
Goodwill And Intangible Assets [Line Items]
Other intangible asset impairment losses		2,200,000
CPG Segment
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses					$ 14,900,000
CPG Segment | Trade names
Goodwill And Intangible Assets [Line Items]
Other intangible asset impairment losses		$ 2,000,000.0
Industrial Segment
Goodwill And Intangible Assets [Line Items]
Accumulated intangible asset impairment losses, gross					$ 600,000
Consumer Segment
Goodwill And Intangible Assets [Line Items]
Accumulated intangible asset impairment losses, gross				$ 53,000,000.0
Consumer Segment | Trade names | Restructuring Expense
Goodwill And Intangible Assets [Line Items]
Other intangible asset impairment losses	$ 4,000,000.0