XML 39 R26.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2016
Equity [Abstract] |
Schedule of Activity in Noncontrolling Interests | The following table illustrates the noncontrolling interest activity for the periods presented:
|  | 2016 |  |  | 2015 |
|  | (Dollars in millions) |
Balance at September 30 |  | $ | 104 |  |  | $ | 122 |
Net income attributable to noncontrolling interests |  |  | 8 |  |  |  | 5 |
Noncontrolling interest foreign currency translation adjustment |  |  | (2 | ) |  |  | (3 | )
Noncontrolling interest dividends declared |  |  | (16 | ) |  |  | (13 | )
Balance at March 31 |  | $ | 94 |  |  | $ | 111 |

X
- Definition Other comprehensive income noncontrolling interest. + References No definition available. + Details
Name: | cbt_OtherComprehensiveIncomeNoncontrollingInterestTableTextBlock
Namespace Prefix: | cbt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration