cm:Concept: us-gaap:StockholdersEquityChangeInReportingEntity
| Stockholders' Equity, Change in Reporting Entity |
| us-gaap:StockholdersEquityChangeInReportingEntity |
| Impact on total stockholders' equity of cumulative effect of change in reporting entity. A change in reporting entity is considered as follows: (1) presenting consolidated statements in place of the financial statements of individual reporting entities; (2) changing the combination of subsidiaries that make up the group for which the consolidated financial statements are presented; and (3) changing the entities included in the combined financial statements. A business combination accounted for under the purchase method and the consolidation of a variable interest entity are not considered a change in reporting entity. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:StockholdersEquityChangeInReportingEntity |