CONDENSED CONSOLIDATED INCOME STATEMENTS - USD ($) shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Operating revenues	$ 2,888.1	$ 2,908.1
Operating expenses
Cost of sales	1,309.7	1,383.4
Other operation and maintenance	534.0	454.4
Depreciation and amortization	305.5	278.1
Property and revenue taxes	69.6	60.8
Total operating expenses	2,218.8	2,176.7
Operating income	669.3	731.4
Equity in earnings of transmission affiliates	43.8	41.7
Other income, net	40.8	39.6
Interest expense	172.2	117.6
Other expense	(87.6)	(36.3)
Income before income taxes	581.7	695.1
Income tax expense	74.1	127.1
Net income	507.6	568.0
Preferred stock dividends of subsidiary	0.3	0.3
Net loss (income) attributed to noncontrolling interests	0.2	(1.8)
Net income attributed to common shareholders	$ 507.5	$ 565.9
Earnings per share
Basic (in dollars per share)	$ 1.61	$ 1.79
Diluted (in dollars per share)	$ 1.61	$ 1.79
Weighted average common shares outstanding
Basic (in shares)	315.4	315.4
Diluted (in shares)	315.9	316.2

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227