Leases Liability Maturity (Details) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 59
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	209
Lessee, Operating Lease, Liability, Payments, Due Year Two	176
Lessee, Operating Lease, Liability, Payments, Due Year Three	145
Lessee, Operating Lease, Liability, Payments, Due Year Four	105
Lessee, Operating Lease, Liability, Payments, Due Year Five	58
Lessee, Operating Lease, Liability, Payments, Due after Year Five	244
Lessee, Operating Lease, Liability, Payments, Due	996
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	165
Operating Lease, Liability	$ 831