Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule Of Accounts Receivable Not Eliminated During Consolidation

Accounts receivable for these services, which are not eliminated during consolidation, are presented in the table below:

(Thousands of dollars)	March 31, 2022		December 31, 2021
Centuri accounts receivable for services provided to Southwest	$	15,522	$	15,166

Schedule of Segment Reporting Information

The financial information pertaining to the natural gas distribution, utility infrastructure services, and pipeline and storage segments are as follows:

(Thousands of dollars)	Natural Gas Distribution		Utility Infrastructure Services		Pipeline and Storage		Other		Total
Three Months Ended March 31, 2022
Revenues from external customers	$	676,539	$	495,544	$	66,993	$	—	$	1,239,076
Intersegment revenues	—		28,333		—		—		28,333
Total	$	676,539	$	523,877	$	66,993	$	—	$	1,267,409
Segment net income (loss)	$	111,795	$	(23,486)	$	16,930	$	(9,061)	$	96,178
Three Months Ended March 31, 2021
Revenues from external customers	$	521,932	$	339,772	$	—	$	—	$	861,704
Intersegment revenues	—		24,203		—		—		24,203
Total	$	521,932	$	363,975	$	—	$	—	$	885,907
Segment net income (loss)	$	118,715	$	(859)	$	—	$	(563)	$	117,293

(Thousands of dollars)	Natural Gas Distribution		Utility Infrastructure Services		Pipeline and Storage		Other		Total
Twelve Months Ended March 31, 2022
Revenues from external customers	$	1,676,397	$	2,212,087	$	66,993	$	—	$	3,955,477
Intersegment revenues	—		106,476		—		—		106,476
Total	$	1,676,397	$	2,318,563	$	66,993	$	—	$	4,061,953
Segment net income (loss)	$	180,215	$	17,793	$	16,930	$	(35,274)	$	179,664
Twelve Months Ended March 31, 2021
Revenues from external customers	$	1,369,690	$	1,852,910	$	—	$	—	$	3,222,600
Intersegment revenues	—		125,860		—		—		125,860
Total	$	1,369,690	$	1,978,770	$	—	$	—	$	3,348,460
Segment net income (loss)	$	194,234	$	84,207	$	—	$	(1,366)	$	277,075