SHAREHOLDERS' EQUITY (Tables)
 9 Months Ended
Sep. 30, 2016
Stockholders' Equity Note [Abstract]  
Activity included in accumulated other comprehensive loss table
The following table represents the activity included in accumulated other comprehensive loss:
 
Foreign
Currency
Translation
Adjustment
(net of taxes)
 
Unrealized
Gains (Losses)
on Derivative
Contracts
(net of taxes)
 
Pension and
Postretirement
Benefits
(net of taxes)
 
Accumulated
Other Comprehensive
Loss
 
($ in millions)
Balance at January 1, 2015
$
(2.3
)
 
$
(4.2
)
 
$
(436.6
)
 
$
(443.1
)
Unrealized (losses) gains:
 
 
 
 
 
 
 
First quarter
(1.4
)
 
(2.4
)
 
—

 
(3.8
)
Second quarter
0.3

 
(2.2
)
 
—

 
(1.9
)
Third quarter
(1.7
)
 
(6.4
)
 
—

 
(8.1
)
Reclassification adjustments into income:
 
 
 
 
 
 
 
First quarter
—

 
1.9

 
8.6

 
10.5

Second quarter
—

 
1.8

 
8.4

 
10.2

Third quarter
—

 
3.0

 
8.0

 
11.0

Tax benefit (provision):
 
 
 
 
 
 
 
First quarter
—

 
0.2

 
(3.5
)
 
(3.3
)
Second quarter
—

 
0.2

 
(3.1
)
 
(2.9
)
Third quarter
—

 
1.3

 
(3.1
)
 
(1.8
)
Net Change
(2.8
)
 
(2.6
)
 
15.3

 
9.9

Balance at September 30, 2015
$
(5.1
)
 
$
(6.8
)
 
$
(421.3
)
 
$
(433.2
)
Balance at January 1, 2016
$
(12.1
)
 
$
(6.9
)
 
$
(473.5
)
 
$
(492.5
)
Unrealized gains (losses):
 
 
 
 
 
 
 
First quarter
24.0

 
1.1

 
—

 
25.1

Second quarter
(14.3
)
 
(4.6
)
 
—

 
(18.9
)
Third quarter
6.6

 
4.2

 
5.1

 
15.9

Reclassification adjustments into income:
 
 
 
 
 
 
 
First quarter
—

 
3.7

 
6.1

 
9.8

Second quarter
—

 
1.7

 
5.9

 
7.6

Third quarter
—

 
—

 
3.3

 
3.3

Tax (provision) benefit:
 
 
 
 
 
 
 
First quarter
(8.5
)
 
(1.8
)
 
(2.3
)
 
(12.6
)
Second quarter
3.5

 
1.1

 
(2.4
)
 
2.2

Third quarter
(2.0
)
 
(1.6
)
 
(3.0
)
 
(6.6
)
Net Change
9.3

 
3.8

 
12.7

 
25.8

Balance at September 30, 2016
$
(2.8
)
 
$
(3.1
)
 
$
(460.8
)
 
$
(466.7
)