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Benefit Plans Asset Holdings (Details) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012
Equity securities |  |
Defined Benefit Plan Disclosure |  |
New Policy Target Allocation | 47.00% |
Target Allocation | 32.00% |
Plan Asset Allocations | 48.00% | 47.00%
Private equity funds |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 10.00% |
Plan Asset Allocations | 6.00% | 6.00%
Low volatility global public equity [Member] |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 0.00% | 0.00%
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 2.00% |
Plan Asset Allocations | 2.00% | 1.00%
Core fixed income |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 5.00% | 8.00%
Long-term core fixed income |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 4.00% | 4.00%
Investment grade credit |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 6.00% |
Plan Asset Allocations | 6.00% | 9.00%
Foreign Corporate Debt Securities [Member] |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 0.00% | 0.00%
High yield fixed income |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 10.00% | 10.00%
Global TIPS |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 7.00% | 9.00%
Private real assets |  |
Defined Benefit Plan Disclosure |  |
New Policy Target Allocation | 10.00% |
Target Allocation | 10.00% |
Plan Asset Allocations | 7.00% | 6.00%
Commodities |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 0.00% | 0.00%
MLPs |  |
Defined Benefit Plan Disclosure |  |
Target Allocation | 5.00% |
Plan Asset Allocations | 5.00% | 0.00%
Debt securities |  |
Defined Benefit Plan Disclosure |  |
New Policy Target Allocation | 28.00% |
Public real assets |  |
Defined Benefit Plan Disclosure |  |
New Policy Target Allocation | 15.00% |

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- Definition New policy target allocation of investments of this type to total plan assets presented on a weighted average basis. + References No definition available. + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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