Employee Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2022

Schedule of Amount Recognized in Balance Sheet

The amounts recognized in TEC’s Consolidated Balance Sheets for pension and other postretirement benefit obligations and plan assets at December 31 were as follows:

TEC	Pension Benefits						Other Benefits
Amounts recognized in balance sheet
(millions)	2022			2021			2022			2021
Noncurrent assets	$	0		$	78		$	0		$	0
Accrued benefit costs and other current liabilities		(7	)		(3	)		(12	)		(12	)
Deferred credits and other liabilities		(9	)		(12	)		(121	)		(175	)
	$	(16	)	$	63		$	(133	)	$	(187	)

Schedule of Postretirement Benefit Amounts Recognized in Accumulated Other Comprehensive Income, Pretax and Regulatory Assets

The following table provides a detail of the unrecognized gains and losses and prior service credits and costs.

TEC	Pension Benefits				Other Benefits
Amounts recognized in regulatory assets
(millions)	2022		2021		2022		2021
Net actuarial loss	$	242	$	150	$	30	$	79
Amount recognized	$	242	$	150	$	30	$	79

Benefit Obligations [Member]

Schedule of Assumptions Used to Determine Benefit

Assumptions used to determine benefit obligations at December 31:

	Pension Benefits						Other Benefits
	2022			2021			2022			2021
Discount rate		5.55	%		2.77	%		5.53	%		2.84	%
Rate of compensation increase		3.79	%		3.05	%		3.79	%		3.04	%
Healthcare cost trend rate
Immediate rate	n/a			n/a				6.39	%		5.61	%
Ultimate rate	n/a			n/a				4.00	%		4.00	%
Year rate reaches ultimate trend rate	n/a			n/a			2047			2045

Net Periodic Benefit Cost [Member]

Schedule of Assumptions Used to Determine Benefit

Assumptions used to determine net periodic benefit cost for years ended December 31:

	Pension Benefits									Other Benefits
	2022			2021			2020			2022			2021			2020
Discount rate		2.77	%		2.37	%		3.21	%		2.84	%		2.47	%		3.32	%
Expected long-term return on plan assets		6.50	%		6.70	%		7.00	%	n/a			n/a			n/a
Rate of compensation increase		3.05	%		3.08	%		3.79	%		3.04	%		3.07	%		3.79	%
Healthcare cost trend rate
Initial rate	n/a			n/a			n/a				5.61	%		5.74	%		6.03	%
Ultimate rate	n/a			n/a			n/a				4.00	%		4.50	%		4.50	%
Year rate reaches ultimate trend rate	n/a			n/a			n/a			2045			2038			2038

TECO Energy [Member]

Schedule of Change in Plan Assets

Change in plan assets
Fair value of plan assets at beginning of year	$	924		$	903		$	0		$	0
Actual (loss) return on plan assets		(214	)		76			0			0
Employer contributions		18			21			0			0
Employer direct benefit payments		5			1			15			13
Plan participants’ contributions		0			0			4			4
Benefits paid		(78	)		(76	)		0			0
Direct benefit payments		(1	)		(1	)		(19	)		(17	)
Plan settlements (3)		(4	)		0			0			0
Fair value of plan assets at end of year (1)	$	650		$	924		$	0		$	0

(1)The MRV of plan assets is used as the basis for calculating the EROA component of periodic pension expense. MRV reflects the fair value of plan assets adjusted for experience gains and losses (i.e. the differences between actual investment returns and expected returns) spread over five years.

(2)Represent amounts for TECO Energy’s Florida-based other postretirement benefit plan.

(3)Represents TECO Energy’s SERP and Restoration settlement charges as a result of the retirement of certain executives. These charges did impact TEC’s financial statements.

Schedule of Net Periodic Benefit Cost

TECO Energy	Pension Benefits										Other Benefits (1)
	2022			2021			2020				2022			2021			2020
(millions)
Service cost	$	18		$	19		$	20			$	2		$	2		$	2
Interest cost		23			21			26				5			5			6
Expected return on plan assets		(51	)		(52	)		(50	)			0			0			0
Amortization of:
Actuarial loss		17			24			20				3			4			1
Prior service (benefit) cost		0			0			0				(2	)		(2	)		(3	)
Settlement loss		2		0			0			(2)		0			0			0
Net periodic benefit cost	$	9		$	12		$	16			$	8		$	9		$	6

Schedule of Amounts Recognized in OCI and Regulatory Assets

Net loss (gain) arising during the year (includes curtailment gain)	$	123		$	(56	)	$	(8	)	$	(50	)	$	(5	)	$	38
Amounts recognized as component of net periodic benefit cost:
Amortization or curtailment recognition of prior service credit		0			0			0			2			2			2
Amortization or settlement of actuarial loss		(19	)		(23	)		(20	)		(3	)		(4	)		(1	)
Total recognized in OCI and regulatory assets	$	104		$	(79	)	$	(28	)	$	(51	)	$	(7	)	$	39
Total recognized in net periodic benefit cost, OCI and regulatory assets	$	113		$	(67	)	$	(12	)	$	(43	)	$	2		$	45

(1)Represents amounts for TECO Energy’s Florida-based other postretirement benefit plan

(2)Represents TECO Energy’s SERP and Restoration settlement charges as a result of the retirement of certain executives. These charges did impact TEC’s financial statements.

Schedule of Pension Plan Assets

TECO Energy’s strategy is to hire proven managers and allocate assets to reflect a mix of investment styles, emphasize preservation of principal to minimize the impact of declining markets, and stay fully invested except for cash to meet benefit payment obligations and plan expenses.

TECO Energy	2022 Target Allocation			2021 Target Allocation			Actual Allocation, End of Year
Asset Category							2022			2021
Equity securities	50%-70%			50%-70%				58	%		59	%
Fixed income securities	30%-50%			30%-50%				42	%		41	%
Total		100	%		100	%		100	%		100	%

Schedule of Fair Value Hierarchy Plan's Investments

The following table sets forth by level within the fair value hierarchy the plan’s investments.

Pension Plan Investments

TECO Energy	At Fair Value as of December 31, 2022
(millions)
	Level 1			Level 2			Level 3		Using NAV (1)		Total
Cash	$	5		$	0		$	0	$	0	$	5
Accounts receivable		10			0			0		0		10
Accounts payable		(62	)		0			0		0		(62	)
Short-term investment funds (STIFs)		32			0			0		0		32
Real estate investment trusts (REITs)		2			0			0		0		2
Mutual funds		50			0			0		0		50
Municipal bonds		0			1			0		0		1
Government bonds		0			58			0		0		58
Corporate bonds		0			50			0		0		50
Mortgage backed securities (MBS)		0			5			0		0		5
Collateralized mortgage obligations (CMOs)		0			1			0		0		1
Short Sales		0			(3	)		0		0		(3	)
Written Options		0			2			0		0		2
Swaps		0			(1	)		0		0		(1	)
Investments not utilizing the practical expedient		37			113			0		0		150
Common and collective trusts (1)		0			0			0		444		444
Mutual fund (1)		0			0			0		56		56
Total investments	$	37		$	113		$	0	$	500	$	650

(1)In accordance with accounting standards, certain investments that are measured at fair value using the net asset value per share practical expedient have not been classified in the fair value hierarchy. The fair value amounts in this table are to permit reconciliation of the fair value hierarchy to amounts presented in the Consolidated Balance Sheet of TECO Energy.

TECO Energy	At Fair Value as of December 31, 2021
(millions)
	Level 1			Level 2			Level 3		Using NAV (1)		Total
Cash	$	4		$	0		$	0	$	0	$	4
Accounts receivable		4			0			0		0		4
Accounts payable		(70	)		0			0		0		(70	)
Short-term investment funds (STIFs)		31			0			0		0		31
Common stocks		46			0			0		0		46
Real estate investment trusts (REITs)		6			0			0		0		6
Mutual funds		68			0			0		0		68
Municipal bonds		0			1			0		0		1
Government bonds		0			81			0		0		81
Corporate bonds		0			78			0		0		78
Mortgage backed securities (MBS)		0			1			0		0		1
Collateralized mortgage obligations (CMOs)		0			1			0		0		1
Short Sales		0			(2	)		0		0		(2	)
Long Futures		1			0			0		0		1
Swaps		0			1			0		0		1
Investments not utilizing the practical expedient		90			161			0		0		251
Common and collective trusts (1)		0			0			0		592		592
Mutual fund (1)		0			0			0		81		81
Total investments	$	90		$	161		$	0	$	673	$	924

(1)In accordance with accounting standards, certain investments that are measured at fair value using the net asset value per share practical expedient have not been classified in the fair value hierarchy. The fair value amounts in this table are to permit reconciliation of the fair value hierarchy to amounts presented in the Consolidated Balance Sheet of TECO Energy.

The following list details the pricing inputs and methodologies used to value the investments in the pension plan:

•Cash collateral is valued at cash posted due to its short-term nature.

•The STIF is valued at net asset value (NAV). The fund is an open-end investment, resulting in a readily-determinable fair value. Additionally, shares may be redeemed any business day at the NAV calculated after the order is accepted. The NAV is validated with purchases and sales at NAV. These factors make the STIF a level 1 asset.

•The primary pricing inputs in determining the fair value of the Common stocks and REITs are closing quoted prices in active markets.

•The primary pricing inputs in determining the level 1 mutual funds are the mutual funds’ NAVs. The funds are registered open-end mutual funds and the NAVs are validated with purchases and sales at NAV. Since the fair values are determined and published, they are considered readily-determinable fair values and therefore Level 1 assets.

•The primary pricing inputs in determining the fair value of Municipal bonds are benchmark yields, historical spreads, sector curves, rating updates, and prepayment schedules. The primary pricing inputs in determining the fair value of Government bonds are the U.S. treasury curve, CPI, and broker quotes, if available. The primary pricing inputs in determining the fair value of Corporate bonds are the U.S. treasury curve, base spreads, YTM, and benchmark quotes. CMOs are priced using to-be-announced (TBA) prices, treasury curves, swap curves, cash flow information, and bids and offers as inputs. MBS are priced using TBA prices, treasury curves, average lives, spreads, and cash flow information.

•Swaps are valued using benchmark yields, swap curves, and cash flow analyses.

•The primary pricing input in determining the fair value of the mutual fund utilizing the practical expedient is its NAV. It is an unregistered open-end mutual fund. The fund holds primarily corporate bonds, debt securities and other similar instruments issued by U.S. and non-U.S. public- or private-sector entities. The fund may purchase or sell securities on a when-issued basis. These transactions are made conditionally because a security has not yet been issued in the market, although it is authorized. A commitment is made regarding these transactions to purchase or sell securities for a predetermined price or yield, with payment and delivery taking place beyond the customary settlement period. Since this mutual fund is an open-end mutual fund and the prices are not published to an external source, it uses NAV as a practical expedient. The redemption frequency is daily. The redemption notice period is the same day. There were no unfunded commitments as of December 31, 2022.

•The common collective trusts are private funds valued at NAV. The NAVs are calculated based on bid prices of the underlying securities. Since the prices are not published to external sources, NAV is used as a practical expedient. Certain funds invest primarily in equity securities of domestic and foreign issuers while others invest in long duration U.S. investment-grade fixed income assets and seeks to increase return through active management of interest rate and credit risks. The redemption frequency of the funds ranges from daily to weekly and the redemption notice period ranges from 1 business day to 30 business days. There were no unfunded commitments as of December 31, 2022.

•Treasury bills are valued using benchmark yields, reported trades, broker dealer quotes, and benchmark securities.

•Futures are valued using futures data, cash rate data, swap rates, and cash flow analyses.

Schedule of Benefit Payments

Expected Benefit Payments

TECO Energy			Other
(including projected service and net of employee contributions)	Pension		Postretirement
	Benefits		Benefits
(millions)
2023	$	68	$	14
2024		64		14
2025		66		14
2026		66		14
2027		66		14
2028-2032		304		63

TECO Energy [Member] | Other Postretirement Benefits Florida-Based Plan [Member]

Schedule of Change in Benefit Obligation

The following table provides a detail of the change in TECO Energy’s benefit obligations and change in plan assets for combined pension plans (pension benefits) and TECO Energy’s Florida-based other postretirement benefit plan (other benefits).

TECO Energy	Pension Benefits						Other Benefits (2)
Obligations and Funded Status
(millions)	2022			2021			2022			2021
Change in benefit obligation
Benefit obligation at beginning of year	$	850		$	919		$	200		$	212
Service cost		18			19			2			2
Interest cost		23			21			5			5
Plan participants’ contributions		0			0			4			4
Benefits paid		(79	)		(77	)		(19	)		(17	)
Actuarial gain		(142	)		(32	)		(50	)		(6	)
Plan settlements (3)		(4	)		0			0			0
Benefit obligation at end of year	$	666		$	850		$	142		$	200

Schedule of Funded status

At December 31, the aggregate financial position for TECO Energy pension plans and Florida-based other postretirement plans with projected benefit obligations and accumulated projected benefit obligations in excess of plan assets was as follows:

TECO Energy	Pension Benefits					Other Benefits (1)
Funded Status
(millions)	2022			2021		2022			2021
Benefit obligation (PBO/APBO)	$	666		$	850	$	142		$	200
Less: Fair value of plan assets		650			924		0			0
Funded status at end of year	$	(16	)	$	74	$	(142	)	$	(200	)

(1)Represent amounts for TECO Energy’s Florida-based other postretirement benefit plan.