Leases Liability Maturity (Details) $ in Millions	Sep. 30, 2020 USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	$ 76
Lessee, Operating Lease, Liability, to be Paid, Year One	284
Lessee, Operating Lease, Liability, to be Paid, Year Two	252
Lessee, Operating Lease, Liability, to be Paid, Year Three	204
Lessee, Operating Lease, Liability, to be Paid, Year Four	144
Lessee, Operating Lease, Liability, to be Paid, Year Five	83
Lessee, Operating Lease, Liability, to be Paid, after Year Five	250
Lessee, Operating Lease, Liability, to be Paid	1,293
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(180)
Operating Lease, Liability	$ 1,113