PENSION PLANS (Tables)

12 Months Ended

Dec. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Changes in benefit obligation and plan assets

Changes in the benefit obligation and plan assets were as follows:

	December 31, 2012									December 31, 2011
	($ in millions)									($ in millions)
Change in Benefit Obligation	U.S.			Foreign			Total			U.S.			Foreign			Total
Benefit obligation at beginning of year	$	1,884.9		$	64.5		$	1,949.4		$	1,790.0		$	55.6		$	1,845.6
Service cost	2.8			0.7			3.5			2.9			0.6			3.5
Interest cost	89.2			2.8			92.0			91.2			3.0			94.2
Actuarial loss	220.8			2.3			223.1			126.2			10.1			136.3
Benefits paid	(126.9		)	(3.3		)	(130.2		)	(126.5		)	(3.3		)	(129.8		)
Curtailment	—			—			—			1.1			—			1.1
Currency translation adjustments	—			1.4			1.4			—			(1.5		)	(1.5		)
Benefit obligation at end of year	$	2,070.8		$	68.4		$	2,139.2		$	1,884.9		$	64.5		$	1,949.4

	December 31, 2012									December 31, 2011
	($ in millions)									($ in millions)
Change in Plan Assets	U.S.			Foreign			Total			U.S.			Foreign			Total
Fair value of plans’ assets at beginning of year	$	1,842.6		$	64.3		$	1,906.9		$	1,734.9		$	65.5		$	1,800.4
Actual return on plans’ assets	193.0			5.1			198.1			229.6			2.5			232.1
Employer contributions	3.8			1.0			4.8			4.6			1.1			5.7
Benefits paid	(126.9		)	(3.3		)	(130.2		)	(126.5		)	(3.3		)	(129.8		)
Currency translation adjustments	—			1.4			1.4			—			(1.5		)	(1.5		)
Fair value of plans’ assets at end of year	$	1,912.5		$	68.5		$	1,981.0		$	1,842.6		$	64.3		$	1,906.9

	December 31, 2012									December 31, 2011
	($ in millions)									($ in millions)
Funded Status	U.S.			Foreign			Total			U.S.			Foreign			Total
Qualified plans	$	(93.5	)	$	2.1		$	(91.4	)	$	17.4		$	1.8		$	19.2
Non-qualified plans	(64.8		)	(2.0		)	(66.8		)	(59.7		)	(2.0		)	(61.7		)
Total funded status	$	(158.3	)	$	0.1		$	(158.2	)	$	(42.3	)	$	(0.2	)	$	(42.5	)

Amounts recognized in consolidated balance sheets

Amounts recognized in the consolidated balance sheets consisted of:

	December 31, 2012									December 31, 2011
	($ in millions)									($ in millions)
	U.S.			Foreign			Total			U.S.			Foreign			Total
Prepaid benefit cost	$	—		$	2.1		$	2.1		$	17.4		$	1.8		$	19.2
Accrued benefit in current liabilities	(6.0		)	(0.1		)	(6.1		)	(3.9		)	(0.2		)	(4.1		)
Accrued benefit in noncurrent liabilities	(152.3		)	(1.9		)	(154.2		)	(55.8		)	(1.8		)	(57.6		)
Accumulated other comprehensive loss	557.0			19.9			576.9			415.4			19.8			435.2
Net balance sheet impact	$	398.7		$	20.0		$	418.7		$	373.1		$	19.6		$	392.7

Schedule of projected and accumulated benefit obligation, and fair value of plan assets

	December 31,
	2012		2011
	($ in millions)
Projected benefit obligation	$	2,139.2	$	1,949.4
Accumulated benefit obligation	2,125.8		1,941.2
Fair value of plan assets	1,981.0		1,906.9

Components of net periodic benefit income (loss)

	Years Ended December 31,
Components of Net Periodic Benefit Income	2012			2011			2010
	($ in millions)
Service cost	$	6.1		$	6.1		$	6.0
Interest cost	92.0			94.2			98.6
Expected return on plans’ assets	(139.5		)	(139.5		)	(138.8		)
Amortization of prior service cost	2.2			0.8			0.7
Recognized actuarial loss	18.1			14.8			12.6
Curtailments	—			1.1			3.2
Net periodic benefit income	$	(21.1	)	$	(22.5	)	$	(17.7	)
Included in Other Comprehensive Loss (Pretax)
Liability adjustment	$	162.0		$	41.8		$	38.7
Amortization of prior service costs and actuarial losses	(20.3		)	(16.7		)	(16.5		)

Assumptions used in calculations

	U.S. Pension Benefits						Foreign Pension Benefits
Weighted Average Assumptions:	2012		2011		2010		2012		2011		2010
Discount rate—periodic benefit cost	4.9	%	5.3	%	5.75	%	4.4	%	5.5	%	6.5	%
Expected return on assets	8.0	%	8.25	%	8.5	%	8.0	%	8.0	%	7.5	%
Rate of compensation increase	3.0	%	3.0	%	3.0	%	3.5	%	3.5	%	3.5	%
Discount rate—benefit obligation	3.9	%	4.9	%	5.3	%	4.2	%	4.4	%	5.5	%

Rate of returns by asset class considered in setting long-term rate of return assumption

The following rates of return by asset class were considered in setting the long-term rate of return assumption:

U.S. equities	9%	to	13%
Non-U.S. equities	10%	to	14%
Fixed income/cash	5%	to	9%
Alternative investments	5%	to	15%
Absolute return strategies	8%	to	12%

Pension plan asset allocation by asset class

Our pension plan asset allocation at December 31, 2012 and 2011, by asset class was as follows:

	Percentage of Plan Assets
Asset Class	2012		2011
U.S. equities	6	%	5	%
Non-U.S. equities	7	%	8	%
Fixed income/cash	53	%	56	%
Alternative investments	18	%	16	%
Absolute return strategies	16	%	15	%
Total	100	%	100	%

Target allocation and ranges

Asset Class	Target Allocation		Target Range
U.S. equities	6	%	0-14
Non-U.S. equities	6	%	0-14
Fixed income/cash	61	%	44-76
Alternative investments	7	%	0-28
Absolute return strategies	20	%	10-30

Domestic and foreign defined benefit pension plan assets measured at fair value

 The following table summarizes our domestic and foreign defined benefit pension plan assets measured at fair value as of December 31, 2012:

Asset class	Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	($ in millions)
Equity securities
U.S. equities	$	94.8	$	16.9	$	—	$	111.7
Non-U.S. equities	42.9		105.6		—		148.5
Fixed income / cash
Cash	38.2		—		—		38.2
Government treasuries	—		501.7		5.6		507.3
Corporate debt instruments	1.8		358.0		12.2		372.0
Asset-backed securities	—		141.9		—		141.9
Alternative investments
Hedge fund of funds	—		—		286.9		286.9
Real estate funds	—		—		38.2		38.2
Private equity funds	—		—		18.5		18.5
Absolute return strategies	—		277.0		40.8		317.8
Total assets	$	177.7	$	1,401.1	$	402.2	$	1,981.0

The following table summarizes our domestic and foreign defined benefit pension plan assets measured at fair value as of December 31, 2011:

Asset class	Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	($ in millions)
Equity securities
U.S. equities	$	78.8	$	14.9	$	—	$	93.7
Non-U.S. equities	51.4		107.6		—		159.0
Fixed income / cash
Cash	50.1		—		—		50.1
Government treasuries	—		476.2		5.5		481.7
Corporate debt instruments	3.1		395.5		2.9		401.5
Asset-backed securities	—		122.2		—		122.2
Alternative investments
Hedge fund of funds	—		—		258.3		258.3
Real estate funds	—		—		33.9		33.9
Private equity funds	—		—		16.8		16.8
Absolute return strategies	—		254.5		35.2		289.7
Total assets	$	183.4	$	1,370.9	$	352.6	$	1,906.9

Summary of activity for defined benefit plan with significant unobservable inputs

The following table summarizes the activity for our defined benefit pension plans level 3 assets for the year ended December 31, 2012:

	December 31, 2011		Realized Gain/(Loss)		Unrealized Gain/(Loss) Relating to Assets Held at Period End		Purchases, Sales, and Settlements			Transfers In/(Out)		December 31, 2012
	($ in millions)
Fixed income / cash
Government treasuries	$	5.5	$	—	$	0.5	$	(0.4	)	$	—	$	5.6
Corporate debt instruments	2.9		0.3		0.1		8.9			—		12.2
Alternative investments
Hedge fund of funds	258.3		—		25.6		3.0			—		286.9
Real estate funds	33.9		0.8		2.4		1.1			—		38.2
Private equity funds	16.8		—		1.3		0.4			—		18.5
Absolute return strategies	35.2		—		3.0		2.6			—		40.8
Total level 3 assets	$	352.6	$	1.1	$	32.9	$	15.6		$	—	$	402.2

The following table summarizes the activity for our defined benefit pension plans level 3 assets for the year ended December 31, 2011:

	December 31, 2010		Realized Gain/(Loss)		Unrealized Gain/(Loss) Relating to Assets Held at Period End			Purchases, Sales, and Settlements			Transfers In/(Out)		December 31, 2011
	($ in millions)
Fixed income / cash
Government treasuries	$	5.5	$	—	$	(0.2	)	$	0.2		$	—	$	5.5
Corporate debt instruments	2.2		0.3		(0.6		)	1.0			—		2.9
Alternative investments
Hedge fund of funds	251.6		—		6.7			—			—		258.3
Real estate funds	23.8		—		3.7			6.4			—		33.9
Private equity funds	15.7		—		1.1			—			—		16.8
Absolute return strategies	53.9		—		0.6			(19.3		)	—		35.2
Total level 3 assets	$	352.7	$	0.3	$	11.3		$	(11.7	)	$	—	$	352.6