Income Taxes (Roll-Forward of Unrecognized Tax Benefits) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits [Line Items]
Balance as of beginning of the year	$ 26.3	$ 25.7
Increase due to tax positions related to current periods	1.2	1.0
Increase due to tax positions related to prior periods	0.2	0
Decrease due to tax positions related to prior periods	(15.6)	(0.3)
Decrease due to lapse of Statute of Limitations	(2.3)	0
Settlements	(1.6)	0
Foreign exchange	0.4	(0.1)
Balance as of the end of the year	19.7	26.3
Umeco [Member]
Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits [Line Items]
Increase due to tax positions	$ 11.1	$ 0

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Unrecognized Tax Benefits, Foreign Exchange

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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Gross amount of increases in unrecognized tax benefits resulting from acquisitions.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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