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Pension and Postretirement Plans (Tables)
 12 Months Ended
Dec. 31, 2012
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
Pension and postretirement benefit costs for these plans were comprised of:
 
Pension Benefits
 
Postretirement and Other Benefits
(dollars in millions)
2012
 
2011
 
2010
 
2012
 
2011
 
2010
Service cost
$
2.6

 
$
5.1

 
$
5.2

 
$
0.5

 
$
0.3

 
$
0.2

Interest cost on projected benefit obligation
21.3

 
24.8

 
26.8

 
5.6

 
7.1

 
8.0

Expected return on plan assets
(26.1
)
 
(29.3
)
 
(30.3
)
 
—

 
—

 
—

Amortization of:


 

 

 

 

 

Prior service cost (benefit)
0.1

 
0.3

 
0.5

 
(13.2
)
 
(13.2
)
 
(13.1
)
Actuarial loss
19.4

 
14.3

 
9.3

 
6.8

 
6.5

 
5.2

Curtailment loss
—

 
4.2

 
—

 
—

 
—

 
—

Pension/postretirement costs
$
17.3

 
$
19.4

 
$
11.5

 
$
(0.3
)
 
$
0.7

 
$
0.3
Schedule of assumptions used in periodic benefit cost [Table Text Block]
The following are the weighted-average assumptions used in measuring the net periodic cost of the pension and postretirement benefits:
 
Pension Benefits
 
Postretirement and Other Benefits
 
2012
 
2011
 
2010
 
2012
 
2011
 
2010
Discount rate
3.90
%
 
4.90
%
 
5.50
%
 
3.60
%
 
4.50
%
 
5.10
%
Expected long-term rate of return
7.75
%
 
8.25
%
 
8.25
%
 
0
%
 
0
%
 
0
%
Future compensation growth rate
3.00
%
 
3.00
%
 
3.00
%
 
—

 
—

 
—
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
Changes in the plans' benefit obligations and funded status are as follows:
 
 
 
 
 
Postretirement and Other Benefits
 
Pension Benefits
 
(dollars in millions)
2012
 
2011
 
2012
 
2011
Change in benefit obligation:
 
 
 
 
 
 
 
   Benefit obligation at January 1,
$
569.2

 
$
526.1

 
$
164.9

 
$
163.5

Service cost
2.6

 
5.1

 
0.5

 
0.3

Interest cost
21.3

 
24.8

 
5.6

 
7.1

Actuarial loss
30.6

 
60.2

 
2.2

 
13.8

Benefits paid
(38.8
)
 
(47.0
)
 
(26.0
)
 
(27.2
)
Retiree drug subsidy received
—

 
—

 
0.6

 
0.7

Early retiree subsidy received (refunded)
—

 
—

 
(0.1
)
 
1.9

Other
—

 
—

 
4.7

 
4.8

Benefit obligation at December 31,
$
584.9

 
$
569.2

 
$
152.4

 
$
164.9

 
 
 
 
 
 
 
 
Change in plan assets:
 
 
 
 
 
 
 
   Fair value of plan assets at January 1,
$
312.5

 
$
324.0

 
$
12.1

 
$
12.3

Actual return on plan assets
44.2

 
15.4

 
0.4

 
0.3

Employer contributions
25.9

 
20.1

 
24.7

 
24.1

Retiree drug subsidy received
—

 
—

 
0.6

 
0.7

Early retiree subsidy received (refunded)
—

 
—

 
(0.1
)
 
1.9

Benefits paid
(38.8
)
 
(47.0
)
 
(26.0
)
 
(27.2
)
   Fair value of plan assets at December 31,
343.8

 
312.5

 
11.7

 
12.1

Unfunded status
$
(241.1
)
 
$
(256.7
)

$
(140.7
)

$
(152.8
)
Schedule of Assumptions Used [Table Text Block]
The following are the weighted-average assumptions used in accounting for and measuring the projected benefit obligations:
 
Pension Benefits
 
Postretirement and Other Benefits
 
December 31,
 
December 31,
 
2012
 
2011
 
2012
 
2011
Discount rate
3.30
%
 
3.90
%
 
3.10
%
 
3.60
%
Expected long-term rate of return
7.75
%
 
7.75
%
 
0
%
 
0
%
Future compensation growth rate
3.00
%
 
3.00
%
 
—

 
—
Schedule of Health Care Cost Trend Rates [Table Text Block]
The assumed healthcare cost trend rate used to measure the postretirement health benefit obligation is shown below:
 
December 31,
 
2012
 
2011
Healthcare cost trend
6.5
%
 
8.0
%
Rate to which the cost trend is assumed to decline (ultimate trend rate)
4.5
%
 
4.5
%
Year the rates reach the ultimate trend rate
2016

 
2019
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
A one-percentage point change in assumed healthcare cost trend rates would have the following effect on the postretirement benefit costs and obligation:
(dollars in millions)
1% Increase
 
1% Decrease
Service and interest costs for 2012
$
0.2

 
$
(0.2
)
Postretirement benefit obligation at December 31, 2012
5.4

 
(4.8
)
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
The projected benefit obligation is recognized in the Consolidated Balance Sheets as follows:
 
Pension Benefits
 
Postretirement and Other Benefits
 
December 31,
 
December 31,
(dollars in millions)
2012
 
2011
 
2012
 
2011
Accrued payroll and benefits (current liability)
$
1.7

 
$
1.7

 
$
21.4

 
$
21.5

Pension and postretirement benefit obligations (noncurrent liability)
239.4

 
255.0

 
119.3

 
131.3

Total
$
241.1

 
$
256.7

 
$
140.7

 
$
152.8
Schedule of accumulated comprehensive loss from benefit plans recognized in balance sheet [Table Text Block]
Amounts recognized in "Accumulated other comprehensive loss" in the Consolidated Balance Sheets which have not yet been recognized in net pension costs consisted of the following:
 
 
 
 
 
Postretirement and Other Benefits
 
Pension Benefits
 
 
December 31,
 
December 31,
(dollars in millions)
2012
 
2011
 
2012
 
2011
Prior service (cost) benefit, net of tax of $0.2, $0.2, $(26.0), $(30.8)
$
(0.3
)
 
$
(0.4
)
 
$
45.9

 
$
54.3

Actuarial loss, net of tax of $109.0, $111.6, $35.6, $37.3
(192.5
)
 
(196.8
)
 
(62.7
)
 
(65.9
)
Total
$
(192.8
)
 
$
(197.2
)
 
$
(16.8
)
 
$
(11.6
)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Amounts recognized in "Accumulated other comprehensive loss" on the Consolidated Statements of Shareowners’ Deficit and the Consolidated Statements of Comprehensive Income/(Loss) are shown below:
 
Pension Benefits
 
Postretirement and Other Benefits
(dollars in millions)
2012

2011
 
2012
 
2011
Prior service cost recognized:
 
 
 
 
 
 
 
     Reclassification adjustments
$
0.1

 
$
4.5

 
$
(13.2
)
 
$
(13.2
)
Actuarial loss recognized:
 
 
 
 
 
 
 
     Reclassification adjustments
19.4

 
14.3

 
6.8

 
6.5

     Actuarial loss arising during the period
(12.5
)
 
(74.2
)
 
(1.8
)
 
(13.2
)
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
The following amounts currently included in "Accumulated other comprehensive loss" are expected to be recognized in 2013 as a component of net periodic pension and postretirement cost:
 
Pension Benefits
 
Postretirement and Other Benefits
(dollars in millions)
 
Prior service cost (benefit)
$
0.2

 
$
(13.1
)
Actuarial loss
22.1

 
6.6

Total
$
22.3

 
$
(6.5
)
Schedule of Allocation of Plan Assets [Table Text Block]
The fair values of the pension and postretirement plan assets at December 31, 2012 and 2011 by asset category are as follows:
(dollars in millions)
December 31, 2012
 
Quoted Prices
in active
markets
Level 1
 
Significant
observable
inputs
Level 2
 
Significant
unobservable
inputs
Level 3
Mutual funds
 
 
 
 
 
 
 
U.S. equity index funds
$
163.3

 
$
163.3

 
$
—

 
$
—

International equity index funds
49.8

 
49.8

 
—

 
—

Fixed income long-term bond funds
102.9

 
102.9

 
—

 
—

Real estate pooled funds
27.8

 
—

 
—

 
27.8

Group insurance contract
11.7

 
—

 
—

 
11.7

Total
$
355.5

 
$
316.0

 
$
—

 
$
39.5


(dollars in millions)
 
December 31, 2011
 
Quoted Prices
in active
markets
Level 1
 
Significant
observable
inputs
Level 2
 
Significant
unobservable
inputs
Level 3
Mutual funds
 
 
 
 
 
 
 
 
U.S. equity index funds
 
$
150.6

 
$
150.6

 
$
—

 
$
—

International equity index funds
 
44.2

 
44.2

 
—

 
—

Fixed income long-term bond funds
 
91.9

 
91.9

 
—

 
—

Fixed income short-term money market funds
 
0.3

 
—

 
0.3

 
—

Real estate pooled funds
 
25.5

 
—

 
—

 
25.5

Group insurance contract
 
12.1

 
—

 
—

 
12.1

Total
 
$
324.6

 
$
286.7

 
$
0.3

 
$
37.6
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The Level 3 investments had the following changes in 2012 and 2011:
 
Pension
 
Postretirement and Other Benefits
(dollars in millions)
2012
 
2011
 
2012
 
2011
Balance, beginning of year
$
25.5

 
$
21.1

 
$
12.1

 
$
12.3

Realized gains, net
1.0

 
1.7

 
0.4

 
0.3

Unrealized gains, net
1.8

 
3.1

 
—

 
—

Purchases, sales, issuances and settlements, net
(0.5
)
 
(0.4
)
 
(0.8
)
 
(0.5
)
Balance, end of year
$
27.8

 
$
25.5

 
$
11.7

 
$
12.1
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid over the next ten years:
(dollars in millions)
Pension
Benefits
 
Postretirement
and Other
Benefits
 
Medicare
Subsidy
Receipts
2013
$
40.0

 
$
21.2

 
$
0.7

2014
41.7

 
17.5

 
0.7

2015
40.8

 
16.3

 
0.7

2016
41.6

 
14.9

 
0.6

2017
41.6

 
13.6

 
0.6

Years 2018 - 2022
195.2

 
45.6

 
2.2