Retirement Benefits (Tables)
|6 Months Ended|
Mar. 31, 2018
|Defined Benefit Plan [Abstract]|
|Components of net pension costs||
Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.
Reference 1: http://www.xbrl.org/2003/role/presentationRef