Stockholders' Equity
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Stockholders' Equity
Note 6: Stockholders' Equity
Accumulated Other Comprehensive Loss
The following table presents changes in accumulated other comprehensive loss by component, net of tax, for the six months ended June 30, 2018 and 2017, respectively:
 
Defined Benefit Plans
 
Foreign Currency Translation
 
Gain on Cash Flow Hedges
 
Accumulated Other Comprehensive Loss
 
Employee
Benefit Plan
Funded Status
 
Amortization
of Prior
Service Cost
 
Amortization
of Actuarial
(Gain) Loss
 
 
 
Beginning balance as of December 31, 2017
$
(140
)
 
$
1

 
$
49

 
$
1

 
$
10

 
$
(79
)
Other comprehensive income before reclassifications
—

 
—

 
—

 
—

 
6

 
6

Amounts reclassified from accumulated other comprehensive loss
—

 
—

 
4

 
—

 
—

 
4

Net other comprehensive income (loss)
—

 
—

 
4

 
—

 
6

 
10

Ending balance as of June 30, 2018
$
(140
)
 
$
1

 
$
53

 
$
1

 
$
16

 
$
(69
)
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance as of December 31, 2016
$
(147
)
 
$
1

 
$
42

 
$
2

 
$
16

 
$
(86
)
Other comprehensive loss before reclassifications
—

 
—

 
—

 
(1
)
 
(2
)
 
(3
)
Amounts reclassified from accumulated other comprehensive loss
—

 
—

 
4

 
—

 
—

 
4

Net other comprehensive income (loss)
—

 
—

 
4

 
(1
)
 
(2
)
 
1

Ending balance as of June 30, 2017
$
(147
)
 
$
1

 
$
46

 
$
1

 
$
14

 
$
(85
)

The Company does not reclassify the amortization of defined benefit pension cost components from accumulated other comprehensive loss directly to net income in its entirety, as a portion of these costs have been capitalized as a regulatory asset. These accumulated other comprehensive income loss components are included in the computation of net periodic pension cost. See Note 10—Pension and Other Post-Retirement Benefits for further discussion.
The amortization of the gain on cash flow hedges is reclassified to net income during the period incurred and is included in interest, net in the accompanying Consolidated Statements of Operations.
Anti-dilutive Stock Repurchase Program
During the six months ended June 30, 2018, the Company repurchased 0.6 million shares of common stock in the open market at an aggregate cost of $45 million under the anti-dilutive stock repurchase program authorized by the Company’s Board of Directors in 2015. As of June 30, 2018, there were 5.5 million shares of common stock available for repurchase under the program.
Equity Forward Transaction
See Note 4—Acquisitions for discussion relating to the forward sale agreements entered into by the Company on April 11, 2018, and the subsequent settlement of these agreements on June 7, 2018.