Consolidated Statement Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating revenues
Service	$ 724	$ 746
Equipment sales	218	190
Total operating revenues	942	936
Operating expenses
System operations (excluding Depreciation, amortization and accretion reported below)	179	175
Cost of equipment sold	219	228
Selling, general and administrative (including charges from affiliates of $19 million and $21 million, respectively)	326	339
Depreciation, amortization and accretion	159	153
(Gain) loss on asset disposals, net	1	4
(Gain) loss on license sales and exchanges, net	(7)	(17)
Total operating expenses	877	882
Operating income	65	54
Investment and other income (expense)
Equity in earnings of unconsolidated entities	38	33
Interest and dividend income	4	3
Interest expense	(29)	(28)
Other, net	(1)	(1)
Total investment and other income	12	7
Income before income taxes	77	61
Income tax expense	22	33
Net income	55	28
Less: Net income attributable to noncontrolling interests, net of tax	10	2
Net income attributable to U.S. Cellular shareholders	$ 45	$ 26
Basic weighted average shares outstanding	85	85
Basic earnings per share attributable to U.S. Cellular shareholders	$ 0.52	$ 0.31
Diluted weighted average shares outstanding	86	86
Diluted earnings per share attributable to U.S. Cellular shareholders	$ 0.52	$ 0.31