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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Stock by Class
Total common stock outstanding and changes in common stock issued are as follows:
 
Class A Common Stock
 
Class B Common Stock
 
Year Ended December 31
 
Year Ended December 31
 
2019
 
2018
 
2017
 
2019
 
2018
Shares issued at beginning of period
71,675,379

 
66,033,509

 
65,891,930

 
23,793,669

 

Share issuances(a)

 
5,651,177

 

 

 
23,793,669

Issuance (repurchased) pursuant to benefit plans
113,916

 
19,919

 
34,760

 

 

Restricted stock forfeited and withheld for taxes
(70,672
)
 
(51,049
)
 
(126,682
)
 

 

Stock options exercised
8,438

 
21,823

 
233,501

 

 

Shares issued at end of period
71,727,061

 
71,675,379

 
66,033,509

 
23,793,669

 
23,793,669

 
 
 
 
 
 
 
 
 
 
Treasury stock
14,592,888

 
14,592,888

 
14,592,888

 

 

Total shares outstanding
57,134,173

 
57,082,491

 
51,440,621

 
23,793,669

 
23,793,669

 
(a) Represents an aggregate of 29,444,846 shares of Common Stock delivered to AEP as the Stock Consideration related to Federal-Mogul Acquisition. See Note 3, Acquisitions and Divestitures for additional information.