Reportable Segments Assets Reconciliation (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total Segment Assets	$ 10,513.4	$ 9,779.4
Total current assets	1,179.7	401.1
Total Assets	10,513.4	9,779.4
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total Segment Assets	9,075.0	9,118.8
Total Assets	9,075.0	9,118.8
Operating Segments | Natural Gas Reportable Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Segment Assets	7,591.2	7,490.1
Total Assets	7,591.2	7,490.1
Operating Segments | Natural Gas Liquids Reportable Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Segment Assets	1,483.8	1,628.7
Total Assets	1,483.8	1,628.7
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting, Asset Reconciling Item [Line Items]
Total current assets	1,179.7	401.1
Gas stored underground and Other assets	$ 258.7	$ 259.5