Supplementary Information - Condensed Consolidating Financial Statements - Statement of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statement of Operations
Revenues	$ 31,271	$ 29,318	$ 28,118
Costs of revenues	(17,647)	(16,376)	(16,154)
Selling, general and administrative	(5,438)	(5,123)	(4,824)
Amortization of intangible assets	(197)	(190)	(189)
Restructuring and severance costs	(120)	(117)	(60)
Asset impairments	(16)	(43)	(25)
Gain (loss) on operating assets, net	67	78	(1)
Operating income	7,920	7,547	6,865
Equity in pretax income (loss) of consolidated subsidiaries	0	0	0
Interest expense, net	(1,005)	(1,161)	(1,163)
Other loss, net	(970)	(1,191)	(256)
Income from continuing operations before income taxes	5,945	5,195	5,446
Income tax provision	(701)	(1,281)	(1,651)
Income from continuing operations	5,244	3,914	3,795
Discontinued operations, net of tax	0	11	37
Net income	5,244	3,925	3,832
Less Net loss attributable to noncontrolling interests	3	1	1
Net income attributable to Time Warner Inc. shareholders	5,247	3,926	3,833
Comprehensive income	5,317	3,861	3,550
Less Comprehensive loss attributable to noncontrolling interests	3	1	1
Comprehensive income attributable to Time Warner Inc. shareholders	5,320	3,862	3,551
Eliminations
Consolidated Statement of Operations
Revenues	(1,021)	(1,012)	(875)
Costs of revenues	856	823	643
Selling, general and administrative	154	159	223
Amortization of intangible assets	0	0	0
Restructuring and severance costs	0	0	0
Asset impairments	0	0	0
Gain (loss) on operating assets, net	0	0	0
Operating income	(11)	(30)	(9)
Equity in pretax income (loss) of consolidated subsidiaries	(15,518)	(14,898)	(13,493)
Interest expense, net	6	7	7
Other loss, net	1	(2)	(2)
Income from continuing operations before income taxes	(15,522)	(14,923)	(13,497)
Income tax provision	3,031	4,261	4,167
Income from continuing operations	(12,491)	(10,662)	(9,330)
Discontinued operations, net of tax	0	(68)	(74)
Net income	(12,491)	(10,730)	(9,404)
Less Net loss attributable to noncontrolling interests	(6)	(2)	(2)
Net income attributable to Time Warner Inc. shareholders	(12,497)	(10,732)	(9,406)
Comprehensive income	(12,787)	(10,519)	(8,936)
Less Comprehensive loss attributable to noncontrolling interests	(6)	(2)	(2)
Comprehensive income attributable to Time Warner Inc. shareholders	(12,793)	(10,521)	(8,938)
Parent Company \| Reportable Legal Entities
Consolidated Statement of Operations
Revenues	0	0	0
Costs of revenues	0	0	0
Selling, general and administrative	(408)	(416)	(321)
Amortization of intangible assets	0	0	0
Restructuring and severance costs	(2)	(1)	(4)
Asset impairments	0	(6)	(15)
Gain (loss) on operating assets, net	0	0	0
Operating income	(410)	(423)	(340)
Equity in pretax income (loss) of consolidated subsidiaries	7,920	7,633	6,894
Interest expense, net	(832)	(959)	(990)
Other loss, net	(733)	(1,056)	(118)
Income from continuing operations before income taxes	5,945	5,195	5,446
Income tax provision	(701)	(1,281)	(1,651)
Income from continuing operations	5,244	3,914	3,795
Discontinued operations, net of tax	0	11	37
Net income	5,244	3,925	3,832
Less Net loss attributable to noncontrolling interests	3	1	1
Net income attributable to Time Warner Inc. shareholders	5,247	3,926	3,833
Comprehensive income	5,317	3,861	3,550
Less Comprehensive loss attributable to noncontrolling interests	3	1	1
Comprehensive income attributable to Time Warner Inc. shareholders	5,320	3,862	3,551
Guarantor Subsidiaries \| Reportable Legal Entities
Consolidated Statement of Operations
Revenues	7,853	7,527	7,188
Costs of revenues	(3,772)	(3,658)	(3,488)
Selling, general and administrative	(1,319)	(1,178)	(1,100)
Amortization of intangible assets	0	0	0
Restructuring and severance costs	(40)	(80)	(40)
Asset impairments	(1)	(2)	(1)
Gain (loss) on operating assets, net	49	0	2
Operating income	2,770	2,609	2,561
Equity in pretax income (loss) of consolidated subsidiaries	5,557	5,392	4,687
Interest expense, net	(265)	(302)	(312)
Other loss, net	(358)	(90)	20
Income from continuing operations before income taxes	7,704	7,609	6,956
Income tax provision	(1,366)	(2,142)	(2,121)
Income from continuing operations	6,338	5,467	4,835
Discontinued operations, net of tax	0	34	37
Net income	6,338	5,501	4,872
Less Net loss attributable to noncontrolling interests	3	1	1
Net income attributable to Time Warner Inc. shareholders	6,341	5,502	4,873
Comprehensive income	6,439	5,410	4,685
Less Comprehensive loss attributable to noncontrolling interests	3	1	1
Comprehensive income attributable to Time Warner Inc. shareholders	6,442	5,411	4,686
Non-Guarantor Subsidiaries \| Reportable Legal Entities
Consolidated Statement of Operations
Revenues	24,439	22,803	21,805
Costs of revenues	(14,731)	(13,541)	(13,309)
Selling, general and administrative	(3,865)	(3,688)	(3,626)
Amortization of intangible assets	(197)	(190)	(189)
Restructuring and severance costs	(78)	(36)	(16)
Asset impairments	(15)	(35)	(9)
Gain (loss) on operating assets, net	18	78	(3)
Operating income	5,571	5,391	4,653
Equity in pretax income (loss) of consolidated subsidiaries	2,041	1,873	1,912
Interest expense, net	86	93	132
Other loss, net	120	(43)	(156)
Income from continuing operations before income taxes	7,818	7,314	6,541
Income tax provision	(1,665)	(2,119)	(2,046)
Income from continuing operations	6,153	5,195	4,495
Discontinued operations, net of tax	0	34	37
Net income	6,153	5,229	4,532
Less Net loss attributable to noncontrolling interests	3	1	1
Net income attributable to Time Warner Inc. shareholders	6,156	5,230	4,533
Comprehensive income	6,348	5,109	4,251
Less Comprehensive loss attributable to noncontrolling interests	3	1	1
Comprehensive income attributable to Time Warner Inc. shareholders	$ 6,351	$ 5,110	$ 4,252

TIME WARNER INC. 10-K