v3.26.1
OPERATING SEGMENT INFORMATION (Schedule Of Segment Information) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Net interest income $ 677 $ 648 $ 1,339 $ 1,272
Provision for credit losses 3 (1) (4) 17
Net interest income after provision for credit losses 674 649 1,343 1,255
Noninterest income 460 190 647 361
Salaries and employee benefits 344 336 705 678
Technology, telecom, and information processing 72 65 146 135
Occupancy and equipment, net 44 40 85 81
Other direct expenses 91 86 177 171
Indirect/allocated expenses 0 0 0 0
Total noninterest expense 551 527 1,113 1,065
Income (loss) before income taxes 583 312 877 551
Total average loans 61,858 60,460 61,495 60,050
Total average deposits 76,238 74,266 75,851 74,590
Other        
Segment Reporting [Line Items]        
Net interest income 1 (3) (2) (6)
Provision for credit losses 0 0 2 1
Net interest income after provision for credit losses 1 (3) (4) (7)
Noninterest income 288 30 303 51
Salaries and employee benefits 209 203 428 404
Technology, telecom, and information processing 62 55 127 114
Occupancy and equipment, net 10 8 17 17
Other direct expenses 43 34 78 61
Indirect/allocated expenses (300) (272) (576) (533)
Total noninterest expense 24 28 74 63
Income (loss) before income taxes 265 (1) 225 (19)
Total average loans 900 916 883 921
Total average deposits 4,545 5,149 4,520 5,366
Zions Bank | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 187 182 369 358
Provision for credit losses 6 6 (7) 12
Net interest income after provision for credit losses 181 176 376 346
Noninterest income 47 49 99 91
Salaries and employee benefits 36 34 72 70
Technology, telecom, and information processing 3 4 7 8
Occupancy and equipment, net 7 7 14 14
Other direct expenses 13 16 27 33
Indirect/allocated expenses 90 81 173 160
Total noninterest expense 149 142 293 285
Income (loss) before income taxes 79 83 182 152
Total average loans 15,358 15,008 15,206 14,922
Total average deposits 21,129 20,827 21,040 21,018
CB&T | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 164 161 328 312
Provision for credit losses (8) (18) (8) (8)
Net interest income after provision for credit losses 172 179 336 320
Noninterest income 38 32 76 60
Salaries and employee benefits 34 33 69 67
Technology, telecom, and information processing 1 1 2 2
Occupancy and equipment, net 9 8 18 17
Other direct expenses 12 11 23 21
Indirect/allocated expenses 62 56 118 106
Total noninterest expense 118 109 230 213
Income (loss) before income taxes 92 102 182 167
Total average loans 15,398 15,176 15,420 14,927
Total average deposits 15,893 15,210 15,954 14,917
Amegy | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 147 137 292 269
Provision for credit losses 2 10 1 13
Net interest income after provision for credit losses 145 127 291 256
Noninterest income 50 43 97 92
Salaries and employee benefits 28 29 58 59
Technology, telecom, and information processing 2 2 4 4
Occupancy and equipment, net 8 8 17 16
Other direct expenses 10 11 22 25
Indirect/allocated expenses 70 64 136 128
Total noninterest expense 118 114 237 232
Income (loss) before income taxes 77 56 151 116
Total average loans 14,740 14,158 14,680 14,056
Total average deposits 15,355 14,573 15,234 14,692
NBAZ | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 68 64 134 128
Provision for credit losses 1 (5) 8 (13)
Net interest income after provision for credit losses 67 69 126 141
Noninterest income 14 10 25 19
Salaries and employee benefits 13 13 27 27
Technology, telecom, and information processing 1 1 2 2
Occupancy and equipment, net 3 2 6 5
Other direct expenses 3 6 8 14
Indirect/allocated expenses 29 26 54 51
Total noninterest expense 49 48 97 99
Income (loss) before income taxes 32 31 54 61
Total average loans 5,710 5,575 5,660 5,638
Total average deposits 7,209 6,863 7,087 6,905
NSB | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 55 53 109 106
Provision for credit losses 0 4 4 4
Net interest income after provision for credit losses 55 49 105 102
Noninterest income 13 13 26 25
Salaries and employee benefits 11 11 23 23
Technology, telecom, and information processing 1 1 2 3
Occupancy and equipment, net 3 3 6 5
Other direct expenses 5 4 9 9
Indirect/allocated expenses 25 24 49 47
Total noninterest expense 45 43 89 87
Income (loss) before income taxes 23 19 42 40
Total average loans 3,803 3,737 3,774 3,698
Total average deposits 7,515 7,132 7,437 7,149
Vectra | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 34 36 68 71
Provision for credit losses 0 0 (3) 9
Net interest income after provision for credit losses 34 36 71 62
Noninterest income 8 11 17 19
Salaries and employee benefits 10 10 21 21
Technology, telecom, and information processing 1 1 1 1
Occupancy and equipment, net 3 3 6 6
Other direct expenses 4 3 7 6
Indirect/allocated expenses 18 17 36 34
Total noninterest expense 36 34 71 68
Income (loss) before income taxes 6 13 17 13
Total average loans 3,765 3,871 3,736 3,896
Total average deposits 3,476 3,366 3,463 3,403
TCBNW | Operating Segments        
Segment Reporting [Line Items]        
Net interest income 21 18 41 34
Provision for credit losses 2 2 (1) (1)
Net interest income after provision for credit losses 19 16 42 35
Noninterest income 2 2 4 4
Salaries and employee benefits 3 3 7 7
Technology, telecom, and information processing 1 0 1 1
Occupancy and equipment, net 1 1 1 1
Other direct expenses 1 1 3 2
Indirect/allocated expenses 6 4 10 7
Total noninterest expense 12 9 22 18
Income (loss) before income taxes 9 9 24 21
Total average loans 2,184 2,019 2,136 1,992
Total average deposits $ 1,116 $ 1,146 $ 1,116 $ 1,140