FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS: (Tables)

3 Months Ended

Mar. 31, 2013

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS:

Schedule of fair value and balance sheet location of the Company's derivative instruments

		March 31, 2013				December 31, 2012
($ in millions)	Balance Sheet Location	Notional		Fair Value		Notional		Fair Value
Derivatives Designated as Hedging Instruments:
Foreign exchange contracts	Accrued expenses and other current liabilities	$	12.6	$	0.1	$	—	$	—
Total derivatives designated as hedging instruments				$	0.1			$	—
Derivatives Not Designated as Hedging Instruments:
Interest rate swaps	Accrued expenses and other current liabilities	$	—	$	—	$	662.9	$	3.0
	Other liabilities			—				1.8
Total derivatives not designated as hedging instruments				$	—			$	4.8
Total derivatives				$	0.1			$	4.8

Schedule of gains and losses reported in "Other Comprehensive Income" ("OCI") within Equity

	Amount of Gain or (Loss) Recognized in
	OCI on Derivatives and Other Financial
	Instruments (Effective Portion)
	Three months ended March 31,
($ in millions)	2013			2012
Derivatives Designated as Cash Flow Hedges:
Foreign exchange contracts	$	(0.1	)	$	0.1
Non-Derivative Debt Designated as Net Investment Hedge:
Euro-denominated debt	$	—		$	(0.3	)

Schedule of gains and losses reported in the condensed consolidated statements of operations

	Amount of Gain or (Loss)
	Recognized in Income on Derivatives					Location of Gain or (Loss)
	Three months ended March 31,					Recognized in Income on
($ in millions)	2013		2012			Derivatives
Derivatives Not Designated as Hedging Instruments:
Interest rate swaps	$	0.9	$	(0.4	)	Interest expense, net
Total derivatives	$	0.9	$	(0.4	)

Schedule of fair value of the Company's recurring financial assets and liabilities that are required to be measured at fair value in the condensed consolidated balance sheets

	As of March 31, 2013						As of December 31, 2012
($ in millions)	Total		Level 1		Level 2		Total		Level 1		Level 2
Assets
Cash equivalents	$	325.2	$	325.2	$	—	$	1,110.1	$	1,110.1	$	—
Government securities	0.3		0.3		—		0.3		0.3		—
Marketable equity securities	—		—		—		2.2		2.2		—
Total assets at fair value	$	325.5	$	325.5	$	—	$	1,112.6	$	1,112.6	$	—
Liabilities
Foreign exchange contracts	$	0.1	$	—	$	0.1	$	—	$	—	$	—
Interest rate swaps	—		—		—		4.8		—		4.8
Total liabilities at fair value	$	0.1	$	—	$	0.1	$	4.8	$	—	$	4.8