Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Sep. 30, 2020
Statement of Financial Position [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 7.5	$ 7.5
Preferred Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Preferred Stock, Shares Authorized	30,000,000	30,000,000
Preferred Stock, Shares Issued	0	0
Common Stock, Shares, Issued	395,389,246	394,741,349
Common Stock, Shares, Outstanding	363,647,879	363,999,982
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Treasury Stock, Shares	31,741,367	30,741,367