v3.22.2.2
RETIREMENT PLANS - Fair Value of The Company's Pension Plan Asset (Details) - Defined Benefit Pension Plan - USD ($)
$ in Millions
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
International Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 128.9 $ 221.6 $ 209.9
International Plan | Fair Value, Inputs, Level 1 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 39.8 66.9  
International Plan | Fair value, inputs, level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1.7 0.2  
International Plan | Fair value, inputs, level 3 | Insurance contracts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 38.1 66.7  
International Plan | Total common collective trusts measured at net asset value | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 89.1 154.7  
International Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
International Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—equities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 32.6 48.3  
International Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 56.5 106.4  
U.S. Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59.1 81.7 $ 81.5
U.S. Plan | Fair Value, Inputs, Level 1 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2.1 2.9  
U.S. Plan | Fair value, inputs, level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2.1 2.9  
U.S. Plan | Fair value, inputs, level 3 | Insurance contracts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
U.S. Plan | Total common collective trusts measured at net asset value | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57.0 78.8  
U.S. Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2.8 3.4  
U.S. Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—equities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10.0 16.0  
U.S. Plan | Total common collective trusts measured at net asset value | Common collective trusts | Common collective trusts—fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 44.2 $ 59.4