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POSTRETIREMENT BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2012
POSTRETIREMENT BENEFITS Disclosure [Abstract]  
Postretirement plan change in benefit obligation
 
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
$
63.3

 
$
11.6

 
$
74.9

 
$
64.5

 
$
9.3

 
$
73.8

Service cost
1.1

 
0.1

 
1.2

 
1.1

 
0.2

 
1.3

Interest cost
2.7

 
0.4

 
3.1

 
3.0

 
0.5

 
3.5

Actuarial loss
7.4

 
(2.5
)
 
4.9

 
2.8

 
2.3

 
5.1

Benefits paid
(9.0
)
 
(0.4
)
 
(9.4
)
 
(8.1
)
 
(0.4
)
 
(8.5
)
Currency translation adjustments
—

 
0.3

 
0.3

 
—

 
(0.3
)
 
(0.3
)
Benefit obligation at end of year
$
65.5

 
$
9.5

 
$
75.0

 
$
63.3

 
$
11.6

 
$
74.9


 
December 31, 2012
 
December 31, 2011
 
($ in millions)
 
($ in millions)
 
U.S.
 
Foreign
 
Total
 
U.S.
 
Foreign
 
Total
Funded status
$
(65.5
)
 
$
(9.5
)
 
$
(75.0
)
 
$
(63.3
)
 
$
(11.6
)
 
$
(74.9
)
Amounts recognized in consolidated balance sheet
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
Accrued benefit in current liabilities
$
(5.8
)
 
$
(0.3
)
 
$
(6.1
)
 
$
(6.0
)
 
$
(0.4
)
 
$
(6.4
)
Accrued benefit in noncurrent liabilities
(59.7
)
 
(9.2
)
 
(68.9
)
 
(57.3
)
 
(11.2
)
 
(68.5
)
Accumulated other comprehensive loss
39.2

 
(0.8
)
 
38.4

 
35.0

 
1.7

 
36.7

Net balance sheet impact
$
(26.3
)
 
$
(10.3
)
 
$
(36.6
)
 
$
(28.3
)
 
$
(9.9
)
 
$
(38.2
)
Components of net periodic benefit cost
 
Years Ended December 31,
Components of Net Periodic Benefit Cost
2012
 
2011
 
2010
 
($ in millions)
Service cost
$
1.2

 
$
1.3

 
$
1.3

Interest cost
3.1

 
3.5

 
3.8

Amortization of prior service cost
(0.1
)
 
(0.2
)
 
(0.2
)
Recognized actuarial loss
3.2

 
3.2

 
2.6

Curtailment
—

 
—

 
(0.2
)
Net periodic benefit cost
$
7.4

 
$
7.8

 
$
7.3

 
 
 
 
 
 
Included in Other Comprehensive Loss (Pretax)
 
 
 
 
 
Liability adjustment
$
4.8

 
$
5.0

 
$
3.6

Amortization of prior service costs and actuarial losses
(3.1
)
 
(3.0
)
 
(2.2
)
Schedule of actuarial assumption
 
December 31,
Weighted Average Assumptions:
2012
 
2011
 
2010
Discount rate—periodic benefit cost
4.6
%
 
4.9
%
 
5.25
%
Discount rate—benefit obligation
3.6
%
 
4.6
%
 
4.9
%
Assumed healthcare cost trend rates
The assumed healthcare cost trend rates for pre-65 retirees were as follows:

 
December 31,
 
 
 
2012
 
2011
 
 
Healthcare cost trend rate assumed for next year
9.0
%
 
9.5
%
 
 
Rate that the cost trend rate gradually declines to
5.0
%
 
5.0
%
 
 
Year that the rate reaches the ultimate rate
2020

 
2020

 
 
Effects of one percent change in the assumed health care cost trend rates
 A one-percentage-point change in assumed healthcare cost trend rates would have the following effects:

 
One-Percentage
Point Increase
 
One-Percentage
Point Decrease
 
($ in millions)
Effect on total of service and interest costs
$
0.2

 
$
(0.2
)
Effect on postretirement benefit obligation
3.9

 
(3.4
)