Pension Plans and Other Postretirement Benefits Current Forecast of Benefit Payments which Reflect Expected Future Service (Details) - Rockwood Holdings, Inc. $ in Millions	Sep. 30, 2015 USD ($)
United States Pension Plan of US Entity
Defined Benefit Plan Disclosure [Line Items]
Remainder of 2015	$ 0.6
2016	1.6
2017	1.7
2018	1.9
2019	2.0
2020-2024	11.1
Foreign Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Remainder of 2015	3.9
2016	16.4
2017	16.0
2018	16.8
2019	16.9
2020-2024	$ 89.8

Defined Benefit Plan, Expected Future Benefit Payments in Year Six Through Ten

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- 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.

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Amount of benefits from a defined benefit plan expected to be paid in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ 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 (f)

-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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