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Pension and Employee Benefit Plans, Cost Components of Pension Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Components of net periodic benefit cost [Abstract] |  |  |  |  |  |
Net periodic benefit cost | [1] | $ 3.3 |  | $ 2.9 | $ 44.6 |
Other changes in benefit obligation recognized in other comprehensive income (loss) [Abstract] |  |  |  |  |  |
Amortization of net actuarial loss | [2] | (5.6) |  | (5.2) |  |
Pension Plans [Member] |  |  |  |  |  |
Components of net periodic benefit cost [Abstract] |  |  |  |  |  |
Service cost |  | 0.5 |  | 0.6 | 0.6 |
Interest cost |  | 9.9 |  | 9.8 | 11.2 |
Expected return on plan assets |  | (11.9) |  | (12.3) | (14.9) |
Amortization of net actuarial loss |  | 5.6 |  | 5.6 | 6.4 |
Settlements |  | 0.3 |  | 0.0 | 42.1 | [3]
Curtailment gain |  | (0.3) | [4] | 0.0 | 0.0 |
Net periodic benefit cost |  | 4.1 |  | 3.7 | 45.4 |
Other changes in benefit obligation recognized in other comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net actuarial loss |  | (5.8) |  | (1.0) | (17.5) |
Amortization of net actuarial loss |  | 5.9 |  | 5.6 | 48.5 | [3]
Total recognized in other comprehensive income (loss) |  | 0.1 |  | $ 4.6 | $ 31.0 |
Reversal of amortization items [Abstract] |  |  |  |  |  |
Estimated net actuarial loss that will be amortized |  | $ (5.6) |  |  |  |
[1] | Represents net periodic benefit cost, exclusive of service cost, for the Company's pension and postretirement plans.
[2] | Amounts are included in the calculation of net periodic benefit cost for the Company's defined benefit plans, which include pension and other postretirement plans. See Note 16 for additional information about the Company's pension plans.
[3] | During fiscal 2016, in connection with lump-sum payouts to pension plan participants, the Company recorded $42.1 million of settlement losses, which were previously recorded in accumulated other comprehensive loss.
[4] | During the third quarter of fiscal 2018, the Company recorded a pension curtailment gain associated with the closure of a manufacturing facility in Austria (CIS segment). See Note 5 for additional information regarding the closure of this facility.

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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