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v3.21.2

Pension Benefit Obligations - Periodic Cost (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Pension Plan, Defined Benefit |  |  |
Percentage of Plan Assets: |  |  |
Applicable deferred income taxes, included in OCI arising from net prior service cost and net gain/loss | $ 9.3 | $ 15.5 | $ 16.3
United States |  |  |
Percentage of Plan Assets: |  |  |
Interest cost on projected benefit obligation | 4.3 | 6.8 | 9.5
Expected return on plan assets | (6.5) | (7.0) | (9.0)
Amortization of prior service costs (credits) |  | 0.1 | 0.1
Amortization of net loss | 5.9 | 4.7 | 3.7
Curtailment loss recognized |  | 0.5 |
Settlement loss recognized | 0.2 | 0.6 | 0.2
Net periodic benefit cost | 3.9 | 5.7 | 4.5
International |  |  |
Percentage of Plan Assets: |  |  |
Service costs | 0.5 | 0.6 | 0.5
Interest cost on projected benefit obligation | 21.6 | 22.4 | 29.7
Expected return on plan assets | (43.5) | (37.5) | (38.1)
Amortization of prior service costs (credits) | 0.1 | 0.1 | (0.1)
Amortization of net loss | 9.2 | 8.6 | 4.1
Settlement loss recognized | 0.8 | 0.5 | 0.8
Net periodic benefit cost | $ (11.3) | $ (5.3) | $ (3.1)

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