| Filing Date | Form | Description | Filing Group | Downloads |
|---|---|---|---|---|
| 10-K | Annual report which provides a comprehensive overview of the company for the past year |
Annual Filings
|
0000076334-19-000096.pdf 0000076334-19-000096.rtf 0000076334-19-000096.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | |
| 11-K | An annual report of employee stock purchase, savings and similar plans |
Annual Filings
|
0000076334-19-000060.pdf 0000076334-19-000060.rtf 0000076334-19-000060.xls | |
| 10-K | Annual report which provides a comprehensive overview of the company for the past year |
Annual Filings
|
0000076334-18-000087.pdf 0000076334-18-000087.rtf 0000076334-18-000087.xls EX-101.INS - XBRL INSTANCE DOCUMENT | |
| 11-K | An annual report of employee stock purchase, savings and similar plans |
Annual Filings
|
0000076334-18-000060.pdf 0000076334-18-000060.rtf 0000076334-18-000060.xls | |
| 10-K | Annual report which provides a comprehensive overview of the company for the past year |
Annual Filings
|
0000076334-17-000095.pdf 0000076334-17-000095.rtf 0000076334-17-000095.xls EX-101.INS - XBRL INSTANCE DOCUMENT | |
| 11-K | An annual report of employee stock purchase, savings and similar plans |
Annual Filings
|
0000076334-17-000069.pdf 0000076334-17-000069.rtf 0000076334-17-000069.xls | |
| 10-K | Annual report which provides a comprehensive overview of the company for the past year |
Annual Filings
|
0000076334-16-000196.pdf 0000076334-16-000196.rtf 0000076334-16-000196.xls EX-101.INS - XBRL INSTANCE DOCUMENT | |
| 11-K | An annual report of employee stock purchase, savings and similar plans |
Annual Filings
|
0000076334-16-000161.pdf 0000076334-16-000161.rtf 0000076334-16-000161.xls | |
| ARS | An annual report to security holders |
Annual Filings
|
||
| 10-K | Annual report which provides a comprehensive overview of the company for the past year |
Annual Filings
|
0000076334-15-000079.pdf 0000076334-15-000079.rtf 0000076334-15-000079.xls EX-101.INS - XBRL INSTANCE DOCUMENT |
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