Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Operating Segment Information and Concentrations of Risk - Summary of Geographical Information (Detail)

v3.20.1
Operating Segment Information and Concentrations of Risk - Summary of Geographical Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Segment Reporting Information [Line Items]      
Net sales $ 2,606.8 $ 2,506.6 $ 2,054.5
Total Identifiable Assets 4,028.3 4,032.6  
Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 2,391.4 2,345.7  
General Corporate      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 1,636.9 1,686.9  
North America      
Segment Reporting Information [Line Items]      
Net sales 1,817.0 1,691.5 1,592.8
North America | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 1,324.8 1,294.6  
Australia      
Segment Reporting Information [Line Items]      
Net sales 290.4 315.1 301.1
Australia | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 220.0 235.4  
Germany      
Segment Reporting Information [Line Items]      
Net sales 135.7 137.1 2.1
Germany | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 519.3 512.3  
New Zealand      
Segment Reporting Information [Line Items]      
Net sales 72.2 79.1 76.8
New Zealand | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 32.4 39.2  
Other Countries      
Segment Reporting Information [Line Items]      
Net sales 291.5 283.8 $ 81.7
Other Countries | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets $ 294.9 $ 264.2