| （単位：十億円） | 4Q14 | 4Q15 | 2Q16 | 3Q16 | 4Q16 | 1Q17 | 2Q17 | 3Q17 | 4Q17 | 1Q18 | 2Q18 | 3Q18 | 4Q18 | 1Q19 | 2Q19 | 3Q19 | 4Q19 | 1Q20 | 2Q20 | 3Q20 | 4Q20 | 1Q21 | 2Q21 | 3Q21 | 4Q21 | 1Q22 | 2Q22 | 3Q22 | 4Q22 | 1Q23 | 2Q23 | 3Q23 | 4Q23 | 1Q24 | 2Q24 | 3Q24 | 4Q24 | 1Q25 | 2Q25 | 3Q25 | 4Q25 | 1Q26 | 2Q26 | 3Q26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 現金同等物 | - | 3 | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - |
| 現金 + 有価証券 | - | 3 | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - |
| 流動資産合計 | - | 6 | 5 | - | 3 | - | 1 | - | 1 | - | 3 | - | 3 | - | 3 | - | 3 | - | 3 | - | 3 | - | 2 | - | 3 | - | 1 | - | 1 | - | 0 | - | 1 | - | 1 | - | 0 | - | - | - | 0 | - | - | - |
| 有形固定資産 | - | 37 | 37 | 37 | 39 | 38 | 38 | 38 | 39 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 39 | 38 | 39 | 38 | 38 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 36 | 37 | 36 | 36 | 36 |
| 固定資産合計 | - | 185 | 207 | - | 206 | - | 206 | - | 206 | - | 206 | - | 206 | - | 206 | - | 191 | - | 191 | - | 191 | - | 191 | - | 191 | - | 191 | - | 191 | - | 191 | - | 191 | - | 166 | - | 167 | - | - | - | 170 | - | - | - |
| 総資産 | - | 5,520 | 5,409 | 5,391 | 5,407 | 5,614 | 5,532 | 5,585 | 5,573 | 5,478 | 5,507 | 5,511 | 5,526 | 5,519 | 5,475 | 5,496 | 5,451 | 5,510 | 5,465 | 5,489 | 5,493 | 5,759 | 5,949 | 6,053 | 6,706 | 6,914 | 7,187 | 7,266 | 7,044 | 7,111 | 6,168 | 6,278 | 6,220 | 6,367 | 6,416 | 6,503 | 6,442 | 6,446 | 6,339 | 6,499 | 6,431 | 6,546 | 6,563 | 6,516 |
| 短期借入金 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 25 | - | - | - | - | - | - | - | 4 | - | - | - |
| 一年内返済予定の長期借入金 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 流動負債合計 | - | 1 | 1 | - | 1 | - | 0 | - | 0 | - | 0 | - | 1 | - | 0 | - | 2 | - | 1 | - | 1 | - | 0 | - | 1 | - | 0 | - | 0 | - | 25 | - | 25 | - | 0 | - | 0 | - | - | - | 4 | - | - | - |
| 固定負債合計 | - | 0 | - | - | 3 | - | 2 | - | 2 | - | 1 | - | 1 | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 総負債 | - | 5,285 | 5,159 | 5,136 | 5,149 | 5,353 | 5,268 | 5,337 | 5,324 | 5,224 | 5,251 | 5,252 | 5,277 | 5,269 | 5,224 | 5,251 | 5,214 | 5,274 | 5,225 | 5,247 | 5,260 | 5,524 | 5,711 | 5,814 | 6,459 | 6,666 | 6,935 | 7,012 | 6,794 | 6,862 | 5,944 | 6,056 | 5,991 | 6,134 | 6,182 | 6,267 | 6,197 | 6,203 | 6,091 | 6,253 | 6,191 | 6,303 | 6,315 | 6,270 |
| 利益剰余金 | - | 60 | 63 | 65 | 69 | 71 | 75 | 72 | 75 | 75 | 77 | 77 | 78 | 79 | 78 | 76 | 79 | 78 | 78 | 78 | 79 | 79 | 82 | 82 | 81 | 83 | 85 | 88 | 89 | 91 | 94 | 94 | 95 | 97 | 101 | 102 | 103 | 106 | 110 | 110 | 112 | 114 | 119 | 120 |
| 株主資本 | 196 | 235 | 250 | 256 | 258 | 261 | 264 | 248 | 249 | 254 | 256 | 259 | 249 | 250 | 251 | 245 | 236 | 236 | 240 | 242 | 232 | 235 | 238 | 239 | 247 | 248 | 252 | 254 | 251 | 249 | 224 | 222 | 229 | 233 | 235 | 236 | 245 | 244 | 248 | 245 | 240 | 243 | 248 | 247 |