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Organization and Basis of Consolidation and Presentation (Details) shares in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025 segment shares	Mar. 31, 2026 CAD ($)	Mar. 31, 2026 USD ($)
Organization and basis of presentation
Number of operating segments \| segment	2
Forecast \| Discontinued Operations, Held-for-Sale \| NGL Business
Organization and basis of presentation
Cash consideration		$ 5,150	$ 3,750
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Current liabilities	Current liabilities
Derivative liability \| $			$ 65
PAA \| AAP
Organization and basis of presentation
Ownership interest (in units) \| shares	233.0
Ownership interest (as a percent)	31.00%
AAP \| PAGP
Organization and basis of presentation
Ownership interest (as a percent)	85.00%