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Employee Retirement Benefits (Tables)
12 Months Ended
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Net Periodic Benefit Costs [Table Text Block]
The following table displays components of our net periodic benefit cost for our qualified and nonqualified pension plans and other postretirement plan for the years ended December 31, 2013, 2012 and 2011. The net periodic benefit cost for each period is calculated based on assumptions at the end of the prior year, except for the interim remeasurement in April 2013 due to the plan amendments to cease benefit accruals as of June 30, 2013.
 
For the Year Ended December 31,
 
2013
 
2012
 
2011
 
 
 
 
 
Other Post-
 
 
 
 
 
Other Post-
 
 
 
 
 
Other Post-
 
Pension
 
Retirement
 
Pension
 
Retirement
 
Pension
 
Retirement
 
Plans
 
Plan
 
Plans
 
Plan
 
Plans
 
Plan
 
(Dollars in millions)
Service cost
 
$
22

 
 
 
$
6

 
 
 
$
37

 
 
 
$
6

 
 
 
$
39

 
 
 
$
6

 
Interest cost
 
68

 
 
 
8

 
 
 
72

 
 
 
9

 
 
 
72

 
 
 
9

 
Expected return on plan assets
 
(85
)
 
 
 

 
 
 
(73
)
 
 
 

 
 
 
(69
)
 
 
 

 
Curtailment gain
 
(5
)
 
 
 

 
 
 

 
 
 

 
 
 

 
 
 

 
Amortization
 
16

 
 
 
(4
)
 
 
 
30

 
 
 
(3
)
 
 
 
12

 
 
 
(7
)
 
Net periodic benefit cost
 
$
16

 
 
 
$
10

 
 
 
$
66

 
 
 
$
12

 
 
 
$
54

 
 
 
$
8

 
Pre- and Post-tax Amounts Recognized in AOCI [Table Text Block]
The following table displays the changes in the pre-tax and after-tax amounts recognized in AOCI that have not been recognized as a component of net periodic benefit cost for the years ended December 31, 2013 and 2012.
 
For the Year Ended
 
2013
 
2012
 
 
 
 
 
Other Post-
 
 
 
 
 
Other Post-
 
Pension
 
Retirement
 
Pension
 
Retirement
 
Plans
 
Plan
 
Plans
 
Plan
 
(Dollars in millions)
Actuarial Loss:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1
 
$
499

 
 
 
$
43

 
 
 
$
393

 
 
 
$
36

 
Current year actuarial (gain) loss
 
(236
)
 
 
 
(34
)
 
 
 
135

 
 
 
8

 
Actuarial gain due to curtailment
 
(135
)
 
 
 

 
 
 

 
 
 

 
Actuarial loss due to plan amendment(1)
 
226

 
 
 

 
 
 

 
 
 

 
Amortization
 
(16
)
 
 
 
(2
)
 
 
 
(29
)
 
 
 
(1
)
 
Ending balance, December 31
 
338

 
 
 
7

 
 
 
499

 
 
 
43

 
Prior Service Cost (Credit):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1
 
$
3

 
 
 
$
(40
)
 
 
 
$
4

 
 
 
$
(46
)
 
Prior service credit due to curtailment
 
(3
)
 
 
 

 
 
 

 
 
 

 
Amortization
 

 
 
 
5

 
 
 
(1
)
 
 
 
6

 
Ending balance, December 31
 

 
 
 
(35
)
 
 
 
3

 
 
 
(40
)
 
Pre-tax amount recorded in AOCI
 
$
338

 
 
 
$
(28
)
 
 
 
$
502

 
 
 
$
3

 
After-tax amount recorded in AOCI
 
$
406

 
 
 
$
(11
)
 
 
 
$
502

 
 
 
$
3

 

__________
(1)
Primarily includes the incremental costs incurred due to risk premiums required by insurance carriers to provide annuities and the higher actuarial value of lump sums distributed earlier than previously expected retirement ages.
Status of Pension and Other Postretirement Plans [Table Text Block]
The following table displays the status of our pension and other postretirement plans as of December 31, 2013 and 2012.
 
As of December 31,
 
2013
 
2012
 
 
 
 
 
Other Post-
 
 
 
 
 
Other Post-
 
Pension
 
Retirement
 
Pension
 
Retirement
 
Plans
 
Plan
 
Plans
 
Plan
 
(Dollars in millions)
Change in Projected Benefit Obligation:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Projected benefit obligation at beginning of year
 
$
1,724

 
 
 
$
201

 
 
 
$
1,452

 
 
 
$
183

 
Service cost
 
22

 
 
 
6

 
 
 
37

 
 
 
6

 
Interest cost
 
68

 
 
 
8

 
 
 
72

 
 
 
9

 
Plan participants’ contributions
 

 
 
 
2

 
 
 

 
 
 
2

 
Net actuarial loss (gain)
 
15

 
 
 
(34
)
 
 
 
198

 
 
 
9

 
Curtailment
 
(142
)
 
 
 

 
 
 

 
 
 

 
Benefits paid
 
(39
)
 
 
 
(8
)
 
 
 
(35
)
 
 
 
(8
)
 
Projected benefit obligation at end of year
 
1,648

 
 
 
175

 
 
 
1,724

 
 
 
201

 
Change in Plan Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair value of plan assets at beginning of year
 
1,227

 
 
 

 
 
 
1,042

 
 
 

 
Actual return on plan assets
 
111

 
 
 

 
 
 
136

 
 
 

 
Employer contributions
 
25

 
 
 
6

 
 
 
84

 
 
 
6

 
Plan participants’ contributions
 

 
 
 
2

 
 
 

 
 
 
2

 
Benefits paid
 
(39
)
 
 
 
(8
)
 
 
 
(35
)
 
 
 
(8
)
 
Fair value of plan assets at end of year
 
1,324

 
 
 

 
 
 
1,227

 
 
 

 
Funded status at end of year(1)
 
$
(324
)
 
 
 
$
(175
)
 
 
 
$
(497
)
 
 
 
$
(201
)
 
__________
(1) 
Included in “Other liabilities” in our consolidated balance sheets as of December 31, 2013 and 2012.
Schedule of Assumptions Used [Table Text Block]
The following table displays the actuarial assumptions for our plans used in determining the net periodic benefit costs and the projected and accumulated benefit obligations for the periods presented below.
 
December 31,
 
Pension Benefits
 
Postretirement Benefits
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Weighted-average assumptions used to determine net periodic benefit costs for the years ended:
 
 
 
 
 
 
 
 
 
 
 
Discount rate
4.25
%
(1) 
4.95
%
 
5.65
%
 
4.05
%
 
4.75
%
 
5.40
%
Average rate of increase in future compensation
N/A
(2) 
4.00

 
4.00

 

 
 
 
 
Expected long-term weighted-average rate of return on plan assets
6.75

 
7.00

 
7.25

 

 
 
 
 
Weighted-average assumptions used to determine benefit obligation as of:
 
 
 
 
 
 
 
 
 
 
 
Discount rate
4.60
%
 
4.15
%
 
4.95
%
 
4.93
%
 
4.05
%
 
4.75
%
Average rate of increase in future compensation
N/A
(2) 
4.00

 
4.00

 

 
 
 
 
Health care cost trend rate assumed for next year:
 
 
 
 
 
 
 
 
 
 
 
Pre-65
 
 
 
 
 
 
7.00
%
 
7.50
%
 
8.00
%
Post-65
 
 
 
 
 
 
7.00

 
7.50

 
8.00

Rate that cost trend rate gradually declines to and remains at:
 
 
 
 
 
 
5.00

 
5.00

 
5.00

Year that rate reaches the ultimate trend rate
 
 
 
 
 
 
2018
 
2018
 
2018

__________
(1)
The pension benefit plans were remeasured as of April 30, 2013. As a result, a discount rate of 4.15% was used for the period January 1 through April 30, 2013.
(2) 
Future compensation increases were not factored into the pension benefit plans after June 30, 2013. An average rate of increase in future compensation of 4% was used for the period January 1 through June 30, 2013.
Qualified Pension Plan Assets by Asset Category at Their Fair Value [Table Text Block]
The following table displays our qualified pension plan assets by asset category at their fair value as of December 31, 2013 and 2012. The fair value of assets in Level 1 have been determined based on quoted prices of identical assets in active markets as of year end, while the fair value of assets in Level 2 have been determined based on the net asset value per share of the investments as of year end. None of the fair values for plan assets were determined by using significant unobservable inputs, or Level 3.
 
Fair Value Measurement as of December 31,
 
2013
 
2012
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Total
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Total
 
(Dollars in millions)
Cash equivalents
 
$

 
 
 
$
6

 
 
$
6

 
 
$

 
 
 
$
16

 
 
$
16

Equity securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. large-cap(1)
 

 
 
 

 
 

 
 
405

 
 
 

 
 
405

U.S. mid/small cap(2)
 

 
 
 

 
 

 
 
105

 
 
 

 
 
105

International(3)
 

 
 
 

 
 

 
 

 
 
 
215

 
 
215

Fixed income investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term U.S. investment grade corporate bond fund(4)
 
927

 
 
 

 
 
927

 
 

 
 
 

 
 

Long-term U.S. government bond fund(5)
 
257

 
 
 

 
 
257

 
 

 
 
 

 
 

Long-term U.S. government / credit bond fund(6)
 
134

 
 
 

 
 
134

 
 

 
 
 

 
 

Investment grade credit(7)
 

 
 
 

 
 

 
 

 
 
 
486

 
 
486

Total plan assets at fair value
 
$
1,318

 
 
 
$
6

 
 
$
1,324

 
 
$
510

 
 
 
$
717

 
 
$
1,227

__________
(1) 
Consists of a publicly traded equity index fund that tracks the S&P 500.
(2) 
Consists of a publicly traded equity index fund that tracks all regularly traded U.S. stocks except those in the S&P 500.
(3) 
Consists of an international equity fund that tracks an index of approximately 6,100 securities across over 40 countries. United Kingdom has the largest share with 15%.
(4) 
This mutual fund’s objective is to track the performance of the Barclays US Long Credit A/Better Index.
(5) 
This mutual fund’s objective is to track the performance of the Barclays U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index.
(6) 
This mutual fund’s objective is to track the performance of the Barclays US Long Government/Credit Float Adjusted Index.
(7) 
Consists of a bond fund that tracks a broadly diversified investment grade index that consists of approximately 3,600 issuances of investment grade bonds from diverse industries. International markets represent 19% of the fund.
Schedule of Expected Benefit Payments [Table Text Block]
The following table displays the benefits we expect to pay in each of the next five years and in the aggregate for the subsequent five years for our pension plans and other postretirement plan and are based on the same assumptions used to measure our benefit obligation as of December 31, 2013.
 
Expected Retirement Plan Benefit Payments
 
 
 
 
 
Other Postretirement Benefits
 
Pension Benefits
 
Before Medicare Part D Subsidy
 
Medicare Part D Subsidy
 
(Dollars in millions)
2014
 
$
37

 
 
 
$
8

 
 
 
$
1

 
2015
 
1,763

(1) 
 
 
8

 
 
 
1

 
2016
 
N/A

(1) 
 
 
9

 
 
 
1

 
2017
 
N/A

(1) 
 
 
10

 
 
 
1

 
2018
 
N/A

(1) 
 
 
10

 
 
 
1

 
2019 — 2023
 
N/A

(1) 
 
 
64

 
 
 
6

 
__________
(1)
Benefits under the pension plans are expected to be distributed by December 31, 2015.