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v3.23.3

Retirement Plans - Accumulated Benefit Obligations and Reconciliations of Changes in Projected Benefit Obligation, Changes in Plan Assets and Funded Status (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Pension Plan | United States |  |  |
Retirement Plans [Line Items] |  |  |
Accumulated Benefit Obligation | $ 1,564 | $ 1,822 |
Change in Projected Benefit Obligation |  |  |
Projected benefit obligation at beginning of year | 1,822 | 2,629 |
Service cost | 0 | 0 | $ 0
Interest cost | 78 | 56 | 47
Plan participant contributions | 0 | 0 |
Actuarial gain | (37) | (587) |
Benefits and settlements paid | (299) | (276) |
Other | 0 | 0 |
Currency translation adjustment | 0 | 0 |
Projected benefit obligation at end of year | 1,564 | 1,822 | 2,629
Change in Plan Assets |  |  |
Fair value of plan assets at beginning of year | 1,730 | 2,459 |
Actual return on plan assets | 66 | (454) |
Employer and employee contributions | 3 | 1 |
Benefits paid | (85) | (85) |
Settlement payments | (215) | (191) |
Other | 0 | 0 |
Currency translation adjustment | 0 | 0 |
Fair value of plan assets at end of year | 1,499 | 1,730 | 2,459
Funded status | (65) | (92) |
Prepaid benefit cost | 1 | 37 |
Accrued benefit liability | (66) | (129) |
Net amount recognized | $ (65) | $ (92) |
Weighted Average Assumptions |  |  |
Discount rate | 5.48% | 5.08% |
Pension Plan | Foreign Plan |  |  |
Retirement Plans [Line Items] |  |  |
Accumulated Benefit Obligation | $ 1,424 | $ 1,417 |
Change in Projected Benefit Obligation |  |  |
Projected benefit obligation at beginning of year | 1,471 | 2,625 |
Service cost | 16 | 20 | 27
Interest cost | 68 | 39 | 32
Plan participant contributions | 3 | 2 |
Actuarial gain | (62) | (651) |
Benefits and settlements paid | (126) | (166) |
Other | (3) | (3) |
Currency translation adjustment | 106 | (395) |
Projected benefit obligation at end of year | 1,473 | 1,471 | 2,625
Change in Plan Assets |  |  |
Fair value of plan assets at beginning of year | 1,433 | 2,344 |
Actual return on plan assets | (77) | (459) |
Employer and employee contributions | 55 | 94 |
Benefits paid | (61) | (74) |
Settlement payments | (65) | (92) |
Other | (2) | (2) |
Currency translation adjustment | 105 | (378) |
Fair value of plan assets at end of year | 1,388 | 1,433 | 2,344
Funded status | (85) | (38) |
Prepaid benefit cost | 97 | 151 |
Accrued benefit liability | (182) | (189) |
Net amount recognized | $ (85) | $ (38) |
Weighted Average Assumptions |  |  |
Discount rate | 4.72% | 4.36% |
Rate of compensation increase | 2.90% | 3.00% |
Interest crediting rate | 1.63% | 1.69% |
Postretirement Benefits |  |  |
Retirement Plans [Line Items] |  |  |
Accumulated Benefit Obligation | $ 76 | $ 89 |
Change in Projected Benefit Obligation |  |  |
Projected benefit obligation at beginning of year | 89 | 123 |
Service cost | 0 | 1 | 1
Interest cost | 4 | 2 | 2
Plan participant contributions | 3 | 3 |
Actuarial gain | (7) | (25) |
Benefits and settlements paid | (12) | (14) |
Other | 0 | 0 |
Currency translation adjustment | 0 | (1) |
Projected benefit obligation at end of year | 77 | 89 | 123
Change in Plan Assets |  |  |
Fair value of plan assets at beginning of year | 144 | 172 |
Actual return on plan assets | 7 | (20) |
Employer and employee contributions | 5 | 6 |
Benefits paid | (12) | (14) |
Settlement payments | 0 | 0 |
Other | 0 | 0 |
Currency translation adjustment | 0 | 0 |
Fair value of plan assets at end of year | 144 | 144 | $ 172
Funded status | 67 | 55 |
Prepaid benefit cost | 101 | 95 |
Accrued benefit liability | (34) | (40) |
Net amount recognized | $ 67 | $ 55 |
Weighted Average Assumptions |  |  |
Discount rate | 5.42% | 4.92% |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted-average interest crediting rate used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, cash balance and other defined benefit plans with promised interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(5) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480535/715-20-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(5) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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