Equity (Capital Transactions - Narrative) (Details) - USD ($) $ in Millions		9 Months Ended
Feb. 11, 2025	Sep. 30, 2025	Sep. 30, 2024
Equity [Abstract]
Capital contribution	$ 100	$ 100	$ 0

The cash inflow from parent as a source of financing that is recorded as additional paid in capital.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

Name:	us-gaap_ProceedsFromContributionsFromParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration