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Employee Benefit Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
6 Months Ended |
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Mar. 31, 2015
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| Defined Benefit Plan Disclosure [Line Items] | |
| Settlement costs | $ 18us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 |
| Pre-tax charge from AOCI | 27us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationBeforeTax |
| Settlement charges on pension liability | 11us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax |
| Settlement charges on employer contributions | $ 2us-gaap_PensionAndOtherPostretirementBenefitContributions |
| Minimum [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Contribution to multi-employer plan | 80.00%us-gaap_MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersContributions / us-gaap_RangeAxis = us-gaap_MinimumMember |
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- Definition
The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of contributions required by a collective bargaining arrangement to all contributions required of an employer related to a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before tax of reclassification adjustment from accumulated other comprehensive income (loss) for net transition asset (obligation) related to pension and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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