Income Taxes - Reconciled Tax at Statutory Rates (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Income Tax Disclosure [Abstract] | |||
| Income tax expense computed at the statutory tax rates | $ (24.6) | $ (84.4) | $ (79.1) |
| US state income taxes, net of the federal benefit | (4.3) | (3.0) | (3.6) |
| Asbestos - effect of foreign exchange | (1.8) | 0.8 | (0.8) |
| Expenses not deductible | (4.7) | (2.5) | (2.0) |
| US manufacturing deduction | 2.5 | 2.2 | 4.1 |
| Foreign taxes on domestic income | (34.2) | (2.1) | (5.7) |
| Amortization of intangibles | 12.4 | 2.8 | 2.9 |
| Taxes on foreign income | (3.0) | (5.4) | (7.4) |
| Net deferred tax liability revaluation | 27.7 | 0.0 | 0.0 |
| Other items | 1.8 | 1.1 | 5.5 |
| Total income tax expense | $ (28.2) | $ (90.5) | $ (86.1) |
| Effective tax rate (as percent) | 16.20% | 24.70% | 26.10% |
| X | ||||||||||
- Definition Income tax reconciliation amortization of intangibles. No definition available.
|
| X | ||||||||||
- Definition Income tax reconciliation foreign taxes on domestic income No definition available.
|
| X | ||||||||||
- Definition Income tax reconciliation nondeductible expense effect of foreign exchange on asbestos. No definition available.
|
| X | ||||||||||
- Definition Taxes on subsidiary foreign income and withholding taxes paid or accrued on foreign interest, royalties and dividends. No definition available.
|
| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|