Debt (Details) - USD ($) $ in Millions		1 Months Ended
	Mar. 19, 2026	Mar. 31, 2026	Feb. 28, 2026
Corporate | 4.9% Senior Notes Due 2036
Debt Instrument [Line Items]
Face amount			$ 500
Interest rate (as a percent)			4.90%
Corporate | 3.8% Senior Notes Due 2026
Debt Instrument [Line Items]
Interest rate (as a percent)	3.80%
Amount of debt redeemed	$ 500
Boardwalk Pipelines | 6.0% Senior Notes Due 2026
Debt Instrument [Line Items]
Interest rate (as a percent)		6.00%
Amount of debt redeemed		$ 550