Leases (Presentation on Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Oct. 01, 2019
Operating Leases on Consolidated Balance Sheet
Operating lease ROU asset, other noncurrent assets	$ 351.1
Operating lease liabilities, payables and accrued liabilities	67.2
Operating lease liabilities, other noncurrent liabilities	326.2
Total Operating Lease Liabilities	$ 393.4
Accounting Standards Update 2016-02
Operating Leases on Consolidated Balance Sheet
Operating lease ROU asset, other noncurrent assets		$ 332.3
Operating lease liabilities, payables and accrued liabilities		68.6
Operating lease liabilities, other noncurrent liabilities		306.7
Total Operating Lease Liabilities		$ 375.3