Leases - Additional Information (Details) $ in Millions	3 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease extension period (up to)	10 years
Termination period	1 year
Lease liabilities	$ 359
Access Industries
Lessee, Lease, Description [Line Items]
Lease liabilities	$ 142
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	12 years