Regulatory and Rate Matters (Tables)

3 Months Ended

Mar. 31, 2022

Regulated Operations [Abstract]

Schedule of Rate Increases for Transmission Costs

The following sets forth TNMP’s recent interim transmission cost rate increases:

Effective Date	Approved Increase in Rate Base		Annual Increase in Revenue
	(In millions)
March 12, 2021	$	112.6	$	14.1
September 20, 2021	$	41.2	$	6.3
March 25, 2022	$	95.6	$	14.2