Quarterly Financial Information (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

QUARTERLY FINANCIAL INFORMATION (Unaudited)

(in millions)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
2019
Operating revenues	$	960.8	$	791.7	$	884.1	$	860.1	$	3,496.7
Operating income	222.9		182.6		201.1		153.6		760.2
Net income attributed to common shareholder	114.7		84.9		100.6		61.9		362.1
2018
Operating revenues	$	941.5	$	856.2	$	924.0	$	903.3	$	3,625.0
Operating income	136.4		104.5		107.8		53.8		402.5
Net income attributed to common shareholder	105.8		92.8		103.2		56.5		358.3