XML 28 R84.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Pension and Retirement Plans - Assumptions used for projected benefit obligation (Details) - Pension
Sep. 30, 2019
Sep. 30, 2018
U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate: 3.00% 4.00%
International    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate: 1.90% 2.90%
Expected return on plan assets: 3.40% 3.80%
Rate of compensation increase: 0.00% 0.00%