Leases Operating and Finance Lease Maturities Table (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 77
Lessee, Operating Lease, Liability, Payments, Due Year Two	95
Lessee, Operating Lease, Liability, Payments, Due Year Three	74
Lessee, Operating Lease, Liability, Payments, Due Year Four	48
Lessee, Operating Lease, Liability, Payments, Due Year Five	27
Lessee, Operating Lease, Liability, Payments, Due after Year Five	170
Lessee, Operating Lease, Liability, Payments, Due	491
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	187
Operating Lease, Liability	304
Finance Lease Liabilities, Payments, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year	6
Finance Lease, Liability, Payments, Due Year Two	13
Finance Lease, Liability, Payments, Due Year Three	11
Finance Lease, Liability, Payments, Due Year Four	11
Finance Lease, Liability, Payments, Due Year Five	11
Finance Lease, Liability, Payments, Due after Year Five	38
Finance Lease, Liability, Payments, Due	90
Finance Lease, Liability, Undiscounted Excess Amount	16
Finance Lease, Liability	$ 74