Statement of Net Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Revenues:
Revenues	$ 705,895	$ 686,468
Operating Costs and Expenses:
Cost of natural gas sales	21,772	15,645
Operation and maintenance	130,199	111,296
General and administrative	54,774	51,549
Depreciation and amortization	125,367	132,562
Taxes — other than income taxes	26,658	27,114
Regulatory credit resulting from tax rate changes	(7,688)	(7,688)
Other (income) expense, net	1,075	(10,888)
Total operating costs and expenses	352,157	319,590
Operating Income	353,738	366,878
Other (Income) and Other Expenses:
Interest expense	81,096	82,437
Interest income	(20,536)	(1,103)
Allowance for equity and borrowed funds used during construction (AFUDC)	(15,583)	(4,857)
Miscellaneous other (income) expense, net	(30)	2,000
Total other (income) and other expenses	44,947	78,477
Net Income	308,791	288,401
Natural gas transportation
Operating Revenues:
Revenues	623,740	621,537
Natural gas storage
Operating Revenues:
Revenues	47,676	44,158
Natural gas sales
Operating Revenues:
Revenues	21,772	15,645
Other
Operating Revenues:
Revenues	$ 12,707	$ 5,128