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Commitments and Contingencies (Pasadena) (Narrative) (Details) (Pasadena Texas Member [Member], USD $)
In Millions, unless otherwise specified |
6 Months Ended | 12 Months Ended |
|---|---|---|
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Mar. 31, 2015
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Sep. 30, 2012
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Pasadena Texas Member [Member]
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| Loss Contingencies [Line Items] | ||
| Accrual for environmental loss contingencies | $ 12.0 | |
| Estimated environmental remediation completion year | 2042 | |
| Total anticipated exposure at this site | 13 | |
| Change in estimated exposure | $ 0 |