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Benefits (Tables)
 12 Months Ended
Dec. 31, 2015
Postemployment Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The following tables contain information at the dates indicated about the obligations and funded status of the Company’s other postretirement plans.
 
December 31,
 
2015
 
2014
Change in benefit obligation:
 
 
 
Benefit obligation at beginning of period
$
24

 
$
25

Interest cost
1

 
1

Actuarial (gain) loss
(2
)
 
1

Benefits paid, net
(2
)
 
(2
)
Dispositions
—

 
(1
)
Benefit obligation at end of period
$
21

 
$
24

Change in plan assets:
 
 
 
Fair value of plan assets at beginning of period
$
114

 
$
110

Return on plan assets and other
(1
)
 
4

Employer contributions
7

 
7

Benefits paid, net
(2
)
 
(2
)
Dispositions
—

 
(5
)
Fair value of plan assets at end of period
$
118

 
$
114

 
 
 
 
Amount overfunded at end of period (1)
$
(97
)
 
$
(90
)
 
 
 
 
Amounts recognized in accumulated other comprehensive income (pre-tax basis) consist of:
 
 
 
Net actuarial loss
$
(10
)
 
$
(16
)
Prior service cost
14

 
15

 
$
4

 
$
(1
)
(1) 
Recorded as a non-current asset in the consolidated balance sheets.
Schedule of Net Benefit Costs [Table Text Block]
The following tables set forth the components of net periodic benefit cost of the Company’s postretirement benefit plan for the periods presented:
 
Years Ended December 31,
 
2015
 
2014
 
2013
Interest cost
$
1

 
$
1

 
$
1

Expected return on plan assets
(6
)
 
(5
)
 
(5
)
Prior service credit amortization
1

 
1

 
1

Actuarial loss amortization
(1
)
 
(1
)
 
(1
)
Net periodic benefit cost
$
(5
)
 
$
(4
)
 
$
(4
)
Schedule of Assumptions Used [Table Text Block]
The weighted-average assumptions used in determining net periodic benefit cost for the periods presented are shown in the table below:
 
Years Ended December 31,
 
2015
 
2014
 
2013
Discount rate
3.60
%
 
4.29
%
 
3.66
%
Expected return on assets:
 
 
 
 
 
Tax exempt accounts
7.00
%
 
7.00
%
 
7.00
%
Taxable accounts
4.50
%
 
4.50
%
 
4.50
%
Schedule of Health Care Cost Trend Rates [Table Text Block]
The assumed health care cost trend rates used to measure the expected cost of benefits covered by the plans are shown in the table below:
 
December 31,
 
2015
 
2014
Health care cost trend rate
8.10
%
 
7.60
%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)
4.71
%
 
4.90
%
Year that the rate reaches the ultimate trend rate
2021

 
2021
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans.  A one-percentage-point change in assumed health care cost trend rates would have the following effects:
 
One Percentage
Point Increase
 
One Percentage
Point Decrease
Effect on accumulated postretirement benefit obligation
$
1

 
$
(1
)
Schedule of Allocation of Plan Assets [Table Text Block]
The fair value of the Company’s other postretirement plan assets at the dates indicated by asset category is as follows:
 
December 31,
 
2015
 
2014
Cash and cash equivalents
$
3

 
$
3

Mutual fund (1)
115

 
111

Total
$
118

 
$
114


(1) 
This fund of funds invests primarily in a diversified portfolio of equity, fixed income and short-term mutual funds.  As of December 31, 2015, the fund was primarily comprised of 36% equities, 54% fixed income securities and 10% cash.  As of December 31, 2014, the fund was primarily comprised of 38% equities, 52% fixed income securities, and 10% cash.
Schedule of Expected Benefit Payments [Table Text Block]
Benefit Payments.  The Company’s estimate of expected benefit payments, which reflect expected future service, as appropriate, in each of the next five years and in the aggregate for the five years thereafter are shown in the table below.
Years
 
Expected Benefit Payments
2016
 
$
2

2017
 
2

2018
 
1

2019
 
1

2020
 
1

2021 – 2025
 
6