Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenues	$ 44,998	$ 43,310	$ 40,604
Operating expenses
Selling, general and administrative	14,139	13,161	12,259
Depreciation and amortization	6,616	6,486	5,984
Gains on disposal of spectrum licenses	0	0	(235)
Total operating expenses	39,276	38,001	35,716
Operating income	5,722	5,309	4,888
Other income (expense)
Interest expense	(727)	(835)	(1,111)
Interest expense to affiliates	(408)	(522)	(560)
Interest income	24	19	17
Other expense, net	(8)	(54)	(73)
Total other expense, net	(1,119)	(1,392)	(1,727)
Income before income taxes	4,603	3,917	3,161
Income tax expense	(1,135)	(1,029)	1,375
Net income	3,468	2,888	4,536
Preferred Stock Dividends and Other Adjustments	0	0	(55)
Net income attributable to common stockholders	3,468	2,888	4,481
Net income	3,468	2,888	4,536
Other comprehensive (loss) income, net of tax
Unrealized gain on available-for-sale securities, net of tax effect of $0, $0, and $2	0	0	7
Unrealized loss on cash flow hedges, net of tax effect of $(187), $(115), and $0	(536)	(332)	0
Other comprehensive income (loss)	(536)	(332)	7
Total comprehensive income	$ 2,932	$ 2,556	$ 4,543
Earnings per share
Basic (in USD per share)	$ 4.06	$ 3.40	$ 5.39
Diluted (in USD per share)	$ 4.02	$ 3.36	$ 5.20
Weighted average shares outstanding
Basic (in shares)	854,143,751	849,744,152	831,850,073
Diluted (in shares)	863,433,511	858,290,174	871,787,450
Branded postpaid revenues
Revenues
Revenues	$ 22,673	$ 20,862	$ 19,448
Branded prepaid revenues
Revenues
Revenues	9,543	9,598	9,380
Wholesale revenues
Revenues
Revenues	1,279	1,183	1,102
Roaming and other service revenues
Revenues
Revenues	499	349	230
Service
Revenues
Revenues	33,994	31,992	30,160
Operating expenses
Cost of services and equipment sales	6,622	6,307	6,100
Equipment
Revenues
Revenues	9,840	10,009	9,375
Operating expenses
Cost of services and equipment sales	11,899	12,047	11,608
Other revenues
Revenues
Revenues	$ 1,164	$ 1,309	$ 1,069