STATEMENTS OF CONSOLIDATED EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Natural gas, tax (benefit)		$ 2,584	$ (3,191)
Interest rate, tax expense	$ 210	80	105
Other postretirement benefits liability adjustment, tax	$ 150	$ 510	$ 193
Dividends (in dollars per share)	$ 0.12	$ 0.12	$ 0.12
Common stock, authorized shares (in shares)	320,000,000	320,000,000
Preferred stock, authorized shares (in shares)	3,000,000
Preferred stock, shares issued (in shares)	0
Preferred shares, shares outstanding (in shares)	0
EQM
Distributions paid (in dollars per unit)		$ 4.295	3.655
EQGP
Distributions paid (in dollars per unit)		1.123	$ 0.806
RM Partners LP
Distributions paid (in dollars per unit)		$ 0.5966