Leases Maturities of Lease Liabilities (Details) $ in Millions	Jun. 30, 2019 USD ($)	[1]
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Remainder of Fiscal Year	$ 270
Lessee, Operating Lease, Liability, Payments, Due Year Two	532
Lessee, Operating Lease, Liability, Payments, Due Year Three	526
Lessee, Operating Lease, Liability, Payments, Due Year Four	521
Lessee, Operating Lease, Liability, Payments, Due Year Five	516
Lessee, Operating Lease, Liability, Payments, Due after Year Five	6,456
Lessee, Operating Lease, Liability, Payments, Due	8,821
Inputed Interest	(3,105)
Operating Lease, Liability	$ 5,716

[1] Excludes the Company's contingent payments for operating leases (such as payments based on revenues derived from the communications infrastructure located on the leased asset) as such arrangements are excluded from the Company's operating lease liability. Such contingencies are recognized as expense in the period they are resolved.