Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Schedule of Segment Information

(millions)	Tampa								Tampa Electric
Three months ended September 30,	Electric		PGS		Eliminations				Company
2017
Revenues - external	$	597	$	96	$	0			$	693
Intracompany sales		1		14		(15	)			0
Total revenues		598		110		(15	)			693
Total interest charges		26		4		0				30
Net income	$	98	$	8	$	0			$	106
2016
Revenues - external	$	586	$	103	$	0			$	689
Intracompany sales		0		1		(1	)			0
Total revenues		586		104		(1	)			689
Total interest charges		22		4		0				26
Net income	$	94	$	6	$	0			$	100
Nine months ended September 30,
2017
Revenues - external	$	1,581	$	309	$	0			$	1,890
Intracompany sales		2		17		(19	)			0
Total revenues		1,583		326		(19	)			1,890
Total interest charges		78		11		0				89
Net income	$	217	$	31	$	0			$	248
2016
Revenues - external	$	1,509	$	330	$	0			$	1,839
Intracompany sales		1		7		(8	)			0
Total revenues		1,510		337		(8	)			1,839
Total interest charges		69		11		0				80
Net income	$	213	$	26	$	0			$	239
Total assets at September 30, 2017	$	7,544	$	1,253	$	(491	)	(1)	$	8,306
Total assets at December 31, 2016	$	7,357	$	1,191	$	(465	)	(1)	$	8,083

(1) Amounts relate to consolidated deferred tax reclassifications. Deferred tax assets are reclassified and netted with deferred tax liabilities upon consolidation.