Schedule III - Schedule of Real Estate and Depreciation (Notes)

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Text Block]

Description	Encumbrances			Initial Cost to Company	Cost Capitalized Subsequent to Acquisition	Gross Amount Carried at Close of Current Period		Accumulated Depreciation at Close of Current Period			Date of Construction	Date Acquired	Life on Which Depreciation in Latest Income Statement is Computed
Communications infrastructure(1)	$	3,311	(2)	(3)	(3)	$	21,866	$	(8,341	)	Various	Various	Up to 20 years

(1) Includes approximately 40,000 towers and 65,000 route miles of fiber. No single asset exceeds 5% of the aggregate gross amounts at which the assets were carried at the close of the period set forth in the table above.

(2) Encumbrances are reported at face value, without contemplating the effect of deferred financing costs, discounts or premiums. Certain of the Company's debt is secured by (1) a security interest in substantially all of the applicable issuers' assignable personal property, (2) a pledge of the equity interests in each applicable issuer and (3) a security interest in the applicable issuers' leases with tenants to lease tower space (space licenses).

(3) The Company has omitted this information, as it would be impracticable to compile such information on an asset-by-asset basis.

	2018			2017
Gross amount at beginning	$	20,110		$	16,121
Additions during period:
Acquisitions through foreclosure	—			—
Other acquisitions(1)(2)	5			2,788
Communications infrastructure construction and improvements	1,567			1,063
Purchase of land interests	56			81
Sustaining capital expenditures	85			56
Other(3)	64			46
Total additions	1,777			4,034
Deductions during period:
Cost of real estate sold or disposed	(21		)	(45		)
Other	—			—
Total deductions:	(21		)	(45		)
Balance at end	$	21,866		$	20,110

(1) Inclusive of changes between the final purchase price allocation and the preliminary purchase price allocations.

(2) Includes acquisitions of communications infrastructure.

(3) Predominately relates to the purchase of property and equipment under capital leases and installment land purchases.

	2018			2017
Gross amount of accumulated depreciation at beginning	$	(7,303	)	$	(6,446	)
Additions during period:
Depreciation	(1,057		)	(890		)
Total additions	(1,057		)	(890		)
Deductions during period:
Amount for assets sold or disposed	18			26
Other	1			7
Total deductions	19			33
Balance at end	$	(8,341	)	$	(7,303	)