Operating Segments Operating Segments (Tables)

3 Months Ended

Mar. 31, 2019

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended March 31, 2019								Three Months Ended March 31, 2018
	Towers		Fiber		Other		Consolidated Total		Towers		Fiber		Other		Consolidated Total
Segment site rental revenues	$	805	$	414			$	1,219	$	764	$	389			$	1,153
Segment services and other revenues	203		4				207		142		4				146
Segment revenues	1,008		418				1,426		906		393				1,299
Segment site rental cost of operations	211		140				351		211		126				337
Segment services and other cost of operations	121		3				124		82		2				84
Segment cost of operations(a)(b)	332		143				475		293		128				421
Segment site rental gross margin	594		274				868		553		263				816
Segment services and other gross margin	82		1				83		60		2				62
Segment selling, general and administrative expenses(b)	26		48				74		26		43				69
Segment operating profit (loss)	650		227				877		587		222				809
Other selling, general and administrative expenses(b)					$	55	55						$	46	46
Stock-based compensation expense					29		29						26		26
Depreciation, amortization and accretion					394		394						374		374
Interest expense and amortization of deferred financing costs					168		168						160		160
Other (income) expenses to reconcile to income (loss) before income taxes(c)					15		15						85		85
Income (loss) before income taxes							$	216							$	118
Capital expenditures	$	119	$	355	$	6	$	480	$	96	$	262	$	12	$	370
Total assets (at period end)	$	22,114	$	14,930	$	734	$	37,778	$	17,868	$	13,883	$	499	$	32,250

(a) Exclusive of depreciation, amortization and accretion shown separately.

(b) Segment cost of operations for the three months ended March 31, 2019 and 2018 excludes (1) stock-based compensation expense of $6 million and $7 million, respectively, and (2) prepaid lease purchase price adjustments of $5 million, for both periods. For the three months ended March 31, 2019 and 2018 segment selling, general and administrative expenses exclude stock-based compensation expense of $23 million and $19 million, respectively.

(c) See condensed consolidated statement of operations for further information.