Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity Related to TEC Employee PSUs

A summary of the activity related to TEC employee PSUs is presented in the following table:

				Weighted		Aggregate
	Number of			Average Grant		Intrinsic
	Units			Date Fair Value		Value
	(Thousands)			(Per Unit)		(Millions)
Outstanding as of December 31, 2020		390			46.87		21
Granted including DRIP		91			52.25		5
Exercised		(175	)		48.12		10
Forfeited		(26	)		47.82		1
Transferred		5			47.18		0
Outstanding as of December 31, 2021		285			47.74		18