XML 113 R82.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Operating Segment Information and Concentrations of Risk - Summary of Operating Segments (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 1,921.6 | $ 1,728.2 | $ 1,656.9
Total operating income | 393.2 | 354.0 | 335.0
Net interest expense | (27.5) | (25.6) | (7.5)
Total Identifiable Assets | 2,012.7 | 2,029.4 |
Other income (expense) | 1.3 | 2.1 | (4.9)
General Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | (13.6) | (43.6) | (19.0)
Total Identifiable Assets | 718.9 | 774.4 |
North America Fiber Cement [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,493.4 | 1,335.0 | 1,224.7
Total operating income | 343.9 | 352.2 | 290.0
Total Identifiable Assets | 917.4 | 889.7 |
International Fiber Cement [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 411.8 | 379.4 | 418.4
Total operating income | 95.1 | 77.9 | 94.5
Total Identifiable Assets | 335.7 | 324.0 |
Other Businesses [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 16.4 | 13.8 | 13.8
Total operating income | (6.7) | (8.6) | (4.5)
Total Identifiable Assets | 28.4 | 27.7 |
Research and Development [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | (25.5) | (23.9) | (26.0)
Total Identifiable Assets | 12.3 | 13.6 |
Segments Total [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | 406.8 | 397.6 | 354.0
Total Identifiable Assets | 1,293.8 | 1,255.0 |
Worldwide Total [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,921.6 | 1,728.2 | 1,656.9
Total operating income | 367.0 | 330.5 | $ 322.6
Total Identifiable Assets | $ 2,012.7 | $ 2,029.4 |

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net amount of operating interest income (expense). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.10) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_InterestIncomeExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_NorthAmericaFiberCementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_InternationalFiberCementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_OtherBusinessesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_ResearchAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_SegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=jhx_WorldwideMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |