Leases - Schedule of Components of Lease Costs (Details) $ in Millions	3 Months Ended
	Dec. 31, 2019 USD ($)
Lease Cost [Abstract]
Operating lease costs	$ 49.5
Variable and short-term lease costs	26.3
Sublease income	(1.7)
Finance lease cost:
Amortization of lease assets	2.8
Interest on lease liabilities	2.1
Total lease cost, net	$ 79.0