Common Stock (Tables)

12 Months Ended

Dec. 31, 2019

Common Stock.

Summary of the cost and number of Class A common stock repurchased

	Year Ended December 31,
	2019			2018
	Number of shares	Cost of shares		Number of shares	Cost of shares
	repurchased	repurchased		repurchased	repurchased
	(amounts in millions, except share amount)
Stock repurchase programs:
$100 million	146,304		11.8	340,106		26.0
$150 million	81,316		7.7	—		—
Total	227,620	$	19.5	340,106	$	26.0