XML 109 R95.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Postretirement Benefit Plans - Fair Value of Plan Assets Held by Our Postretirement Benefits Plans (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | $ 326.7 | $ 269.2 | $ 286.9
Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 321.5 | 263.1 |
Pension Plan [Member] | U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 70.6 | 67.4 |
Pension Plan [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 26.6 | 58.9 |
Pension Plan [Member] | Fixed income [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 218.7 | 135.0 |
Pension Plan [Member] | Mutual Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Pension Plan [Member] | Cash and other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.6 | 1.8 |
Pension Plan [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.6 | 1.8 |
Pension Plan [Member] | Level 1 [Member] | U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Pension Plan [Member] | Level 1 [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Pension Plan [Member] | Level 1 [Member] | Fixed income [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Pension Plan [Member] | Level 1 [Member] | Mutual Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Pension Plan [Member] | Level 1 [Member] | Cash and other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.6 | 1.8 |
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.2 | 6.1 | $ 7.9
Other Postretirement Benefits Plan [Member] | U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Fixed income [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Mutual Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.2 | 6.1 |
Other Postretirement Benefits Plan [Member] | Cash and other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.2 | 6.1 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] | U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] | Fixed income [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] | Mutual Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 5.2 | 6.1 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] | Cash and other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 315.9 | 261.3 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] | U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 70.6 | 67.4 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 26.6 | 58.9 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] | Fixed income [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 218.7 | 135.0 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] | Mutual Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | 0.0 | 0.0 |
Postretirement Assets Measured at Net Asset Value [Member] | Pension Plan [Member] | Cash and other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan asset | $ 0.0 | $ 0.0 |

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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and 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 (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=itt_DomesticEquitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=itt_InternationalEquitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itt_MeasurementTypeAxis=itt_PostretirementAssetsMeasuredatNetAssetValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |