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

Product Warranties - Summary of Changes in Product Warranty Provision (Detail)

v2.4.1.9
Product Warranties - Summary of Changes in Product Warranty Provision (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]    
Balance at beginning of period $ 31.4us-gaap_ProductWarrantyAccrual $ 27.1us-gaap_ProductWarrantyAccrual
Accruals for product warranties 16.0us-gaap_ProductWarrantyAccrualWarrantiesIssued 14.0us-gaap_ProductWarrantyAccrualWarrantiesIssued
Settlements made in cash or in kind (12.2)us-gaap_ProductWarrantyAccrualPayments (9.7)us-gaap_ProductWarrantyAccrualPayments
Balance at end of period $ 35.2us-gaap_ProductWarrantyAccrual $ 31.4us-gaap_ProductWarrantyAccrual