Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

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
	2018		2017		2016	2018
Shares issued, beginning balance	66,033,509		65,891,930		65,067,132	—
Share issuances (1)	5,651,177		—		—	23,793,669
Issuance pursuant to benefit plans	19,919		34,760		292,514	—
Restricted stock forfeited and withheld for taxes	(51,049	)	(126,682	)	—	—
Stock options exercised	21,823		233,501		532,284	—
Shares issued, ending balance	71,675,379		66,033,509		65,891,930	23,793,669
Treasury stock	14,592,888		14,592,888		11,655,938	—
Total shares outstanding	57,082,491		51,440,621		54,235,992	23,793,669

(1) 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.