Leases (Summary of Financial Information Associated with Leases) (Details) $ in Millions	Jun. 30, 2019 USD ($)
Assets
Operating lease right-of-use assets	$ 619
Total leased assets	800
Current
Accrued expenses and other liabilities	170
Short-term debt and current maturities of long-term debt	40
Long-term
Operating lease liabilities	497
Long-term debt	75
Total lease liabilities	782
Rental equipment
Assets
Finance lease assets, gross	267
Less accumulated depreciation and amortization	(91)
Finance lease assets, net	176
Property and equipment, net
Assets
Less accumulated depreciation and amortization	(19)
Finance lease assets, net	5
Non-rental vehicles
Assets
Finance lease assets, gross	8
Buildings
Assets
Finance lease assets, gross	$ 16