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 (Details)

v3.21.1
Operating Segment Information and Concentrations of Risk - Summary of Geographical Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information [Line Items]      
Net sales $ 2,908.7 $ 2,606.8 $ 2,506.6
Total Identifiable Assets 4,089.0 4,028.3  
Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 2,417.3 2,391.4  
General Corporate      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 1,671.7 1,636.9  
North America      
Segment Reporting Information [Line Items]      
Net sales 2,040.2 1,817.0 1,691.5
North America | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 1,279.4 1,324.8  
Australia      
Segment Reporting Information [Line Items]      
Net sales 321.9 290.4 315.1
Australia | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 256.7 220.0  
Germany      
Segment Reporting Information [Line Items]      
Net sales 143.0 135.7 137.1
Germany | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 527.6 519.3  
New Zealand      
Segment Reporting Information [Line Items]      
Net sales 81.9 72.2 79.1
New Zealand | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets 46.3 32.4  
Other Countries      
Segment Reporting Information [Line Items]      
Net sales 321.7 291.5 $ 283.8
Other Countries | Operating Segments      
Segment Reporting Information [Line Items]      
Total Identifiable Assets $ 307.3 $ 294.9