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Benefit Obligation and Fair Value of Plan Assets with Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2016 | Sep. 30, 2015
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U.S. Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Accumulated benefit obligation, end of year | $ (16) | $ (19)
Fair value of plan assets, end of year | 0 | 0
Projected benefit obligation in excess of plan assets |  |
Benefit obligation, end of year | (16) | (19)
Fair value of plan assets, end of year | 0 | $ 0
Non-U.S. Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Accumulated benefit obligation, end of year | (474) |
Fair value of plan assets, end of year | 415 |
Projected benefit obligation in excess of plan assets |  |
Benefit obligation, end of year | (474) |
Fair value of plan assets, end of year | $ 415 |

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- Definition If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=73719040&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=73719040&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 + Details
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