Condensed Consolidated Statements Of Income (Parenthetical) - shares shares in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2019	Sep. 30, 2020
Stock dividend			5.00%
Average common shares outstanding	[1]	22.5	22.7
As Reported [Member]
Average common shares outstanding		21.5

[1] Adjusted for the declaration of a 5% stock dividend in 2019, shares related to which were issued in February 2020.  Prior to the adjustment, the average common shares outstanding were 21.5 million for the three and nine months ended September 30, 2019, respectively.