v3.26.3
Commitments and Contingencies - SPP OATT Upgrade Costs (Details)
$ in Millions
Sep. 30, 2026
USD ($)
Commitments and Contingencies Disclosure [Abstract]
SPP OATT Upgrade Costs
$ 13
SPP OATT Resettlement [Abstract]
$ 13
X
- Definition
SPP OATT Resettlement
+ References
No definition available.
+ Details
Name:
sps_SPPOATTResettlement
Namespace Prefix:
sps_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- Definition
SPP OATT Upgrade Costs
+ References
No definition available.
+ Details
Name:
sps_SPPOATTUpgradeCosts
Namespace Prefix:
sps_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration