| 
						 年/月 
						 | 
					2000.3 (平12.3)  | 
					2001.3 (平13.3)  | 
					2002.3 (平14.3)  | 
					2003.3 (平15.3)  | 
					2004.3 (平16.3)  | 
					2005.3 (平17.3)  | 
					2006.3 (平18.3)  | 
					2007.3 (平19.3)  | 
					2008.3 (平20.3)  | 
					2009.3 (平21.3)  | 
					2010.3 (平22.3)  | 
					2011.3 (平23.3)  | 
					2012.3 (平24.3)  | 
					2013.3 (平25.3)  | 
					2014.3 (平26.3)  | 
					2015.3 (平27.3)  | 
					2016.3 (平28.3)  | 
					2017.3 (平29.3)  | 
					2018.3 (平30.3)  | 
					2019.3 (令元.3)  | 
					2020.3 (令2.3)  | 
					2021.3 (令3.3)  | 
				
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
						 (資産の部) 
						 | 
					||||||||||||||||||||||
| 
						 流動資産 
						 | 
					13,534 | 12,335 | 12,385 | 12,088 | 10,295 | 10,725 | 10,611 | 11,657 | 10,977 | 11,074 | 9,075 | 8,207 | 8,882 | 8,929 | 10,216 | 11,211 | 11,287 | 11,816 | 12,283 | 12,828 | 13,337 | 12,694 | 
| 
						 現金預金 
						 | 
					971 | 911 | 877 | 1,080 | 1,049 | 1,115 | 1,015 | 1,349 | 1,296 | 1,446 | 1,369 | 1,090 | 1,217 | 997 | 1,213 | 1,643 | 1,648 | 1,945 | 1,900 | 1,686 | 3,150 | 2,585 | 
| 
						 受取手形・完成工事未収入金等 
						 | 
					2,432 | 3,037 | 3,550 | 3,347 | 2,823 | 3,132 | 3,354 | 3,906 | 4,344 | 4,969 | 4,335 | 4,163 | 4,865 | 5,311 | 6,547 | 6,874 | 7,150 | 7,203 | 7,603 | 8,590 | 7,736 | 7,444 | 
| 
						 電子記録債権 
						 | 
					- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 93 | 88 | 210 | 155 | 118 | 126 | 213 | 
| 
						 有価証券 
						 | 
					1,571 | 140 | 285 | 103 | 0 | 80 | 0 | 61 | 18 | 19 | 16 | 36 | 27 | 31 | 34 | 28 | 26 | 25 | 46 | 69 | 71 | 44 | 
| 
						 たな卸不動産 
						 | 
					1,478 | 1,455 | 983 | 866 | 799 | 711 | 754 | 635 | 489 | - | - | - | - | - | - | - | - | - | - | - | - | - | 
| 
						 販売用不動産 
						 | 
					- | - | - | - | - | - | - | - | - | 614 | 549 | 247 | 408 | 205 | 180 | 116 | 171 | 167 | 116 | 122 | 119 | 121 | 
| 
						 未成工事支出金等 
						 | 
					5,793 | 5,336 | 5,183 | 4,651 | 3,864 | 3,902 | 3,656 | 3,679 | 2,787 | - | - | - | - | - | - | - | - | - | - | - | - | - | 
| 
						 未成工事支出金 
						 | 
					- | - | - | - | - | - | - | - | - | 2,076 | 828 | 528 | 482 | 479 | 449 | 398 | 377 | 398 | 455 | 353 | 381 | 691 | 
| 
						 不動産事業支出金 
						 | 
					- | - | - | - | - | - | - | - | - | - | - | - | 150 | 179 | 126 | 182 | 244 | 242 | 254 | 221 | 151 | 228 | 
| 
						 PFIたな卸資産 
						 | 
					- | - | - | - | - | 91 | 182 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 
| 
						 PFI等たな卸資産 
						 | 
					- | - | - | - | - | - | - | 550 | 619 | 622 | 596 | 649 | 656 | 665 | 567 | 515 | 455 | 424 | 461 | 441 | 535 | 380 | 
| 
						 その他のたな卸資産 
						 | 
					- | - | - | - | - | - | - | - | - | 120 | 114 | 143 | 53 | 51 | 47 | 57 | 62 | 78 | 106 | 97 | 87 | 82 | 
| 
						 繰延税金資産 
						 | 
					171 | 187 | 362 | 404 | 375 | 392 | 404 | 362 | 403 | 385 | 257 | 270 | 183 | 207 | 173 | 205 | 175 | 174 | 203 | - | - | - | 
| 
						 未収入金 
						 | 
					- | - | - | 1,320 | 1,056 | 1,053 | 1,014 | 931 | 867 | 665 | 893 | 977 | 731 | 664 | 715 | 956 | 710 | 780 | 794 | 925 | 751 | 645 | 
| 
						 その他 
						 | 
					1,127 | 1,282 | 1,157 | 327 | 339 | 256 | 236 | 188 | 157 | 160 | 124 | 109 | 112 | 139 | 163 | 142 | 178 | 166 | 186 | 202 | 227 | 258 | 
| 
						 貸倒引当金 
						 | 
					△ 13 | △ 16 | △ 15 | △ 14 | △ 12 | △ 11 | △ 8 | △ 8 | △ 7 | △ 5 | △ 10 | △ 7 | △ 7 | △ 3 | △ 2 | △ 1 | △ 1 | △ 1 | △ 1 | △ 1 | △ 1 | △ 1 | 
| 
						 | 
					||||||||||||||||||||||
| 
						 固定資産 
						 | 
					7,040 | 9,634 | 8,060 | 7,396 | 7,919 | 7,695 | 9,159 | 9,011 | 7,562 | 6,181 | 6,830 | 6,849 | 7,304 | 7,633 | 7,971 | 8,750 | 8,231 | 8,343 | 9,204 | 9,316 | 8,965 | 10,032 | 
| 
						  有形固定資産  
						 | 
					4,844 | 4,758 | 3,998 | 3,819 | 3,738 | 3,707 | 3,571 | 3,259 | 3,410 | 3,294 | 3,193 | 3,602 | 3,581 | 3,764 | 4,150 | 4,088 | 4,416 | 4,595 | 5,262 | 5,445 | 5,721 | 6,092 | 
| 
						 建物・構築物 
						 | 
					1,610 | 1,567 | 1,202 | 1,116 | 1,099 | 1,055 | 975 | 828 | 779 | 710 | 662 | 799 | 783 | 947 | 940 | 870 | 922 | 925 | 1,031 | 1,251 | 1,208 | 1,170 | 
| 
						 機械、運搬具及び工具器具備品  
						 | 
					156 | 143 | 130 | 109 | 106 | 113 | 127 | 132 | 122 | 112 | 93 | 100 | 84 | 103 | 190 | 296 | 309 | 295 | 457 | 557 | 552 | 508 | 
| 
						 土地 
						 | 
					2,904 | 2,950 | 2,629 | 2,575 | 2,519 | 2,503 | 2,453 | 2,259 | 2,497 | 2,451 | 2,407 | 2,669 | 2,617 | 2,698 | 2,897 | 2,857 | 3,055 | 3,082 | 3,510 | 3,559 | 3,677 | 3,851 | 
| 
						 リース資産 
						 | 
					- | - | - | - | - | - | - | - | - | 15 | 12 | 10 | 6 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 10 | 
| 
						 建設仮勘定 
						 | 
					171 | 97 | 36 | 18 | 12 | 35 | 15 | 39 | 11 | 4 | 17 | 22 | 89 | 12 | 119 | 60 | 125 | 289 | 260 | 74 | 281 | 550 | 
| 
						 無形固定資産  
						 | 
					34 | 33 | 37 | 56 | 60 | 61 | 62 | 58 | 81 | 68 | 59 | 71 | 60 | 54 | 53 | 63 | 64 | 65 | 50 | 49 | 63 | 64 | 
| 
						 投資その他の資産 
						 | 
					2,161 | 4,841 | 4,024 | 3,519 | 4,120 | 3,926 | 5,526 | 5,693 | 4,069 | 2,818 | 3,577 | 3,175 | 3,662 | 3,814 | 3,767 | 4,598 | 3,751 | 3,681 | 3,891 | 3,820 | 3,179 | 3,875 | 
| 
						 投資有価証券 
						 | 
					1,230 | 4,068 | 3,154 | 2,448 | 3,453 | 3,393 | 5,024 | 5,415 | 3,744 | 2,382 | 2,965 | 2,511 | 2,643 | 3,173 | 3,238 | 4,155 | 3,420 | 3,462 | 3,723 | 3,606 | 2,907 | 3,400 | 
| 
						 長期貸付金 
						 | 
					405 | 382 | 367 | 331 | 318 | 252 | 252 | 12 | 87 | 14 | 11 | 10 | 34 | 43 | 22 | 21 | 21 | 20 | 8 | 17 | 21 | 17 | 
| 
						 退職給付に係る資産 
						 | 
					- | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 0 | 0 | 0 | 0 | - | - | 
| 
						 繰延税金資産 
						 | 
					123 | 18 | 200 | 442 | 69 | 45 | 36 | 47 | 35 | 231 | 369 | 457 | 398 | 38 | 18 | 20 | 20 | 19 | 6 | 17 | 18 | 21 | 
| 
						 土地再評価に係る繰延税金資産  
						 | 
					13 | 13 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 
| 
						 その他 
						 | 
					610 | 613 | 596 | 358 | 333 | 283 | 258 | 256 | 233 | 220 | 270 | 244 | 632 | 603 | 512 | 402 | 291 | 181 | 155 | 181 | 234 | 437 | 
| 
						 貸倒引当金 
						 | 
					△ 221 | △ 254 | △ 294 | △ 61 | △ 55 | △ 48 | △ 45 | △ 37 | △ 30 | △ 30 | △ 40 | △ 48 | △ 46 | △ 45 | △ 26 | △ 2 | △ 2 | △ 2 | △ 2 | △ 2 | △ 1 | △ 1 | 
| 
						 繰延資産 
						 | 
					1 | 0 | 0 | 1 | 3 | 1 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - | - | - | - | - | 
| 
						 為替換算調整勘定 
						 | 
					32 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 
| 
						 | 
					||||||||||||||||||||||
| 
						 資産合計 
						 | 
					20,609 | 21,970 | 20,446 | 19,485 | 18,218 | 18,422 | 19,772 | 20,669 | 18,540 | 17,256 | 15,906 | 15,056 | 16,187 | 16,562 | 18,188 | 19,961 | 19,519 | 20,159 | 21,488 | 22,145 | 22,302 | 22,726 |