The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to changes in the income tax rates under enacted tax laws in the period.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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- Definition

This element represents the total of interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Other Other - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Short-term Debt	$ 467.1		$ 467.1		$ 312.3
Repayments of Long-term Debt			34.2	49.4
Unrecognized Tax Benefits	30.9		30.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(11.0)	1.5	(10.5)	2.6
2012 UK Tax rate - old	25.00%		25.00%
2012 UK Tax rate - new	24.00%		24.00%
UK Tax Rate - 2013	23.00%		23.00%
Northwind Holdings LLC [Member]
Repayments of Long-term Debt			29.2
Tailwind Holdings LLC [Member]
Repayments of Long-term Debt			5.0
Minimum [Member]
Unrecognized Tax Benefits Reasonably Possible Decreases Resulting from Settlements with Taxing Authorities	0
Income Tax Reconciliation, Change in Enacted Tax Rate			8.0
Maximum [Member]
Unrecognized Tax Benefits Reasonably Possible Decreases Resulting from Settlements with Taxing Authorities	6.0
Income Tax Reconciliation, Change in Enacted Tax Rate			$ 10.0