SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

12 Months Ended

Dec. 31, 2019

Selected Quarterly Financial Information [Abstract]

Selected Quarterly Financial Data (Unaudited)

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Selected quarterly financial data for the years ended December 31, 2019 and 2018 is as follows (in millions, except per share data):

	Three Months Ended								Year Ended December 31,
	March 31,		June 30,		September 30,		December 31,
2019:
Operating revenues	$	1,813.4	$	1,889.6	$	1,953.6	$	1,923.7	$	7,580.3
Costs of operations (1)	543.4		563.3		559.9		550.2		2,216.8
Operating income	614.9		683.9		728.3		661.3		2,688.4
Net income	407.6		434.3		505.3		569.4		1,916.6
Net income attributable to American Tower Corporation stockholders	397.4		429.1		498.6		562.7		1,887.8
Net income attributable to American Tower Corporation common stockholders	397.4		429.1		498.6		562.7		1,887.8
Basic net income per share attributable to American Tower Corporation common stockholders	0.90		0.97		1.13		1.27		4.27
Diluted net income per share attributable to American Tower Corporation common stockholders	0.89		0.96		1.12		1.26		4.24

	Three Months Ended									Year Ended December 31,
	March 31,			June 30,		September 30,		December 31,
2018:
Operating revenues	$	1,741.8		$	1,780.9	$	1,785.5	$	2,131.9	$	7,440.1
Costs of operations (1)	519.9			560.3		556.7		540.9		2,177.8
Operating income	402.9			546.0		567.2		388.9		1,905.0
Net income	280.3			314.4		377.3		292.7		1,264.7
Net income attributable to American Tower Corporation stockholders	285.2			306.7		366.9		277.6		1,236.4
Dividends on preferred stock	(9.4		)	—		—		—		(9.4		)
Net income attributable to American Tower Corporation common stockholders	275.8			306.7		366.9		277.6		1,227.0
Basic net income per share attributable to American Tower Corporation common stockholders	0.63			0.69		0.83		0.63		2.79
Diluted net income per share attributable to American Tower Corporation common stockholders	0.63			0.69		0.83		0.62		2.77

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(1)    Represents Operating expenses, exclusive of Depreciation, amortization and accretion, Selling, general, administrative and development expense, and Other operating expenses.