Warner Bros. Discovery (WBD) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 01, 2018
Entity Information [Line Items]
Entity Registrant Name	Discovery, Inc.
Entity Central Index Key	1,437,107
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Series A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		156,055,418
Series B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		6,512,379
Series C Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		359,574,904

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 812,000,000	$ 7,309,000,000
Receivables, net	2,654,000,000	1,838,000,000
Content rights, net	419,000,000	410,000,000
Prepaid expenses and other current assets	636,000,000	434,000,000
Total current assets	4,521,000,000	9,991,000,000
Noncurrent content rights, net	3,323,000,000	2,213,000,000
Property and equipment, net	928,000,000	597,000,000
Goodwill, net	13,102,000,000	7,073,000,000
Intangible assets, net	10,825,000,000	1,770,000,000
Equity method investments, including note receivable	1,231,000,000	335,000,000
Other noncurrent assets	728,000,000	576,000,000
Total assets	34,658,000,000	22,555,000,000
Current liabilities:
Accounts payable	283,000,000	277,000,000
Accrued liabilities	1,730,000,000	1,309,000,000
Deferred revenues	299,000,000	255,000,000
Current portion of debt	153,000,000	30,000,000
Total current liabilities	2,465,000,000	1,871,000,000
Noncurrent portion of debt	19,214,000,000	14,755,000,000
Deferred income taxes	1,994,000,000	319,000,000
Other noncurrent liabilities	972,000,000	587,000,000
Total liabilities	24,645,000,000	17,532,000,000
Commitments and contingencies (See Note 18)
Redeemable noncontrolling interests	419,000,000	413,000,000
Discovery, Inc. stockholders’ equity:
Additional paid-in capital	10,576,000,000	7,295,000,000
Treasury stock, at cost	(6,737,000,000)	(6,737,000,000)
Retained earnings	4,657,000,000	4,632,000,000
Accumulated other comprehensive loss	(613,000,000)	(585,000,000)
Total Discovery, Inc. stockholders' equity	7,889,000,000	4,610,000,000
Noncontrolling interests	1,705,000,000	0
Total equity	9,594,000,000	4,610,000,000
Total liabilities and equity	34,658,000,000	22,555,000,000
Series A Convertible Preferred Stock
Discovery, Inc. stockholders’ equity:
Convertible preferred stock	0	0
Series C Convertible Preferred Stock
Discovery, Inc. stockholders’ equity:
Convertible preferred stock	0	0
Additional paid-in capital	0
Series A Common Stock
Discovery, Inc. stockholders’ equity:
Common stock	1,000,000	1,000,000
Treasury stock, at cost	(171,000,000)
Series B Common Stock
Discovery, Inc. stockholders’ equity:
Common stock	0	0
Series C Common Stock
Discovery, Inc. stockholders’ equity:
Common stock	5,000,000	$ 4,000,000
Treasury stock, at cost	$ (6,600,000,000)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2018	Dec. 31, 2017
Series A-1 Convertible Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock authorized (in shares)	8
Preferred stock issued (in shares)	8
Series C-1 Convertible Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock authorized (in shares)	6
Preferred stock issued (in shares)	6
Series A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	1,700	1,700
Common stock issued (in shares)	159	157
Series B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	100	100
Common stock issued (in shares)	7	7
Series C Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	2,000	2,000
Common stock issued (in shares)	524	383

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Distribution	$ 1,051	$ 855
Advertising	1,012	687
Other	244	71
Total revenues	2,307	1,613
Costs and expenses:
Costs of revenues, excluding depreciation and amortization	1,060	607
Selling, general and administrative	609	415
Depreciation and amortization	193	80
Restructuring and other charges	241	24
Total costs and expenses	2,103	1,126
Operating income	204	487
Interest expense	(177)	(91)
Loss on extinguishment of debt	0	(54)
Loss from equity investees, net	(22)	(53)
Other expense, net	(22)	(13)
(Loss) income before income taxes	(17)	276
Income tax benefit (expense)	20	(55)
Net income	3	221
Net income attributable to noncontrolling interests	(5)	0
Net income attributable to redeemable noncontrolling interests	(6)	(6)
Net (loss) income available to Discovery, Inc.	$ (8)	$ 215
Series A, B and C Common Stock
Net (loss) income per share allocated to Discovery, Inc. Series A, B and C common stockholders:
Basic (in dollars per share)	$ (0.01)	$ 0.37
Diluted (in dollars per share)	$ (0.01)	$ 0.37
Weighted average shares outstanding:
Basic (in shares)	422	389
Diluted (in shares)	609	588

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 3	$ 221
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	3	68
Available-for-sale securities	0	(1)
Derivatives	(5)	(8)
Comprehensive income	1	280
Comprehensive income attributable to noncontrolling interests	(5)	0
Comprehensive income attributable to redeemable noncontrolling interests	(6)	(7)
Comprehensive (loss) income attributable to Discovery, Inc.	$ (10)	$ 273

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net income	$ 3	$ 221
Adjustments to reconcile net income to cash provided by operating activities:
Share-based compensation expense	15	21
Depreciation and amortization	193	80
Content rights expense and impairment	751	458
Equity in losses of investee companies and cash distributions	36	54
Deferred income taxes	(35)	(34)
Loss on extinguishment of debt	0	54
Other, net	67	3
Changes in operating assets and liabilities, net of acquisitions and dispositions:
Receivables, net	(36)	(44)
Content rights and payables, net	(698)	(474)
Accounts payable and accrued liabilities	(171)	(122)
Income taxes receivable and prepaid income taxes	(42)	48
Foreign currency and other, net	77	(10)
Cash provided by operating activities	160	255
Investing Activities
Business acquisitions, net of cash acquired	(8,565)	0
Payments for investments	(22)	(188)
Distributions from equity method investees	0	5
Purchases of property and equipment	(48)	(47)
(Payments for) proceeds from derivative instruments, net	(42)	5
Other investing activities, net	2	1
Cash used in investing activities	(8,675)	(224)
Financing Activities
Commercial paper borrowings, net	0	54
Borrowings under revolving credit facility	0	150
Principal repayments of revolving credit facility	0	(125)
Borrowings under term loan agreements	2,000	0
Borrowings from debt, net of discount and including premiums	0	659
Principal repayments of debt, including discount payment and premiums to par value	0	(650)
Principal repayments of capital lease obligations	(13)	(13)
Repurchases of stock	0	(200)
Cash settlement of common stock repurchase contracts		58
Distributions to redeemable noncontrolling interests	(2)	(3)
Share-based plan proceeds (payments), net	23	(8)
Borrowings under program financing line of credit	22	0
Other financing activities, net	(11)	(6)
Cash provided by (used in) financing activities	2,019	(84)
Effect of exchange rate changes on cash and cash equivalents	(1)	20
Net change in cash and cash equivalents	(6,497)	(33)
Cash and cash equivalents, beginning of period	7,309	300
Cash and cash equivalents, end of period	$ 812	$ 267

Consolidated Statements of Equi

Consolidated Statements of Equity - 3 months ended Mar. 31, 2018 - USD ($) shares in Millions, $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss	Discovery, Inc. Stockholders’ Equity	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2017		14	547
Beginning balance at Dec. 31, 2017	$ 4,610	$ 0	$ 5	$ 7,295	$ (6,737)	$ 4,632	$ (585)	$ 4,610	$ 0
Increase (Decrease) in Stockholders' Equity
Cumulative effect of accounting change (See Note 1)	7					33	(26)	7
Net (loss) income available to Discovery, Inc. and attributable to noncontrolling interests	(3)					(8)		(8)	5
Other comprehensive loss	(2)						(2)	(2)
Share-based compensation	41			41				41
Tax settlements associated with share-based compensation	(16)			(16)				(16)
Issuance of stock in connection with the acquisition of Scripps Networks Interactive, Inc. (Scripps Networks) (in shares)			139
Issuance of stock and noncontrolling interest in connection with the acquisition of Scripps Networks Interactive, Inc. (Scripps Networks)	4,918		$ 1	3,217				3,218	1,700
Issuance of stock in connection with share-based plans (in shares)			4
Issuance of stock in connection with share-based plans	39			39				39
Ending balance (in shares) at Mar. 31, 2018		14	690
Ending balance at Mar. 31, 2018	$ 9,594	$ 0	$ 6	$ 10,576	$ (6,737)	$ 4,657	$ (613)	$ 7,889	$ 1,705

Description of Business and Bas

Description of Business and Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Description of Business Discovery, Inc. (“Discovery” or the “Company”) is a global media company that provides content across multiple distribution platforms, including pay-television ("pay-TV"), free-to-air ("FTA") and broadcast, various digital distribution platforms and content licensing agreements. The Company also operates a portfolio of websites, digital direct-to-consumer products, production studios and curriculum-based education products and services. As further discussed in Note 2, on March 6, 2018 , the Company acquired Scripps Networks Interactive, Inc. ("Scripps Networks"), and changed its name from "Discovery Communications, Inc." to "Discovery, Inc." The Company presents the following business units: U.S. Networks, consisting principally of domestic television networks and digital content services, and International Networks, consisting principally of international television networks and digital content services; and Education and Other, consisting principally of curriculum-based product and service offerings and production studios. Financial information for Discovery’s reportable segments is discussed in Note 19. Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of Discovery and its majority-owned subsidiaries in which a controlling interest is maintained. For each non-wholly owned subsidiary, the Company evaluates its ownership and other interests to determine whether it should consolidate the entity or account for its ownership interest as an investment. As part of its evaluation, the Company makes judgments in determining whether the entity is a variable interest entity ("VIE") and, if so, whether it is the primary beneficiary of the VIE and is thus required to consolidate the entity. (See Note 3.) Inter-company accounts and transactions between consolidated entities have been eliminated in consolidation. Unaudited Interim Financial Statements These consolidated financial statements are unaudited; however, in the opinion of management, they reflect all adjustments consisting only of normal recurring adjustments necessary to state fairly the financial position, results of operations and cash flows for the periods presented in conformity with U.S. generally accepted accounting principles (“GAAP”) applicable to interim periods. The results of operations for the interim periods presented are not necessarily indicative of results for the full year or future periods. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in Discovery’s Annual Report on Form 10-K for the year ended December 31, 2017 (the “ 2017 Form 10-K”). Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates, judgments and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Management continually re-evaluates its estimates, judgments and assumptions, and management’s evaluation could change. These estimates are sometimes complex, sensitive to changes in assumptions and may require fair value determinations using Level 3 fair value measurements. Actual results may differ materially from those estimates. Estimates and judgments inherent in the preparation of the consolidated financial statements include accounting for asset impairments, revenue recognition, allowances for doubtful accounts, content rights, depreciation and amortization, business combinations, share-based compensation, defined benefit plans, income taxes, other financial instruments, contingencies and the determination of whether the Company is the primary beneficiary of entities in which it holds variable interests. Preferred Stock Exchange As a result of the July 30, 2017 , Preferred Share Exchange Agreement (the "Exchange Agreement") with Advance/Newhouse Programming Partnership ("Advance/Newhouse"), in which Discovery agreed to issue newly designated shares of Series A-1 and Series C-1 preferred stock in exchange for all outstanding shares of Discovery's Series A and Series C convertible participating preferred stock (see Note 9), historical basic and diluted earnings per share available to Series C-1 preferred stockholders, previously Series C preferred stockholders, has changed. The transactions contemplated by the Exchange Agreement were completed on August 7, 2017. Prior to the Exchange Agreement, Series C convertible preferred stock was convertible into Series C common stock at a conversion rate of 2.0 shares of Series C common stock for each share of Series C preferred stock. Following the exchange, the Series C-1 preferred stock may be converted into Series C common stock at the initial conversion rate of 19.3648 shares of Series C common stock for each share of Series C-1 preferred stock. As such, the Company has retrospectively recast basic and diluted earnings per share information for Series C preferred stock for the three months ended March 31, 2017 in order to conform with per share earnings that would have been available for Series C-1 preferred stock. (See Note 15.) The Exchange Agreement did not impact historical basic and diluted earnings per share attributable to the Company's Series A, B and C common stockholders. The table below sets forth the impact of the preferred stock modification to the Company's calculated basic earnings per share for the three months ended March 31, 2017 . Pre-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 0.74 Post-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 7.11 Accounting and Reporting Pronouncements Adopted Recognition and Measurement of Financial Instruments ("ASU 2016-01") On January 1, 2018 , the Company adopted new guidance that enhances the reporting model for financial instruments. The new guidance impacted the financial statements as follows: • Gains and losses on common stock investments with readily determinable fair values are now recorded in other expense, net. Previously, the Company recorded these gains and losses in other comprehensive income ("OCI"). The Company adopted this guidance on a modified retrospective basis and recorded a transition adjustment, to reclassify accumulated other comprehensive income to retained earnings, of $26 million , net of tax as of January 1, 2018 . The new guidance eliminates the available-for-sale ("AFS") classification. (See Note 3 and Note 9.) • Upon adoption of ASU 2016-01, the Lionsgate Collar, as defined in Note 3, no longer receives the hedge accounting designation. There is no change to the manner in which movements in fair value of these instruments will be reflected in the financial statements, as gains and losses will continue to be recorded as a component of other expense, net on the consolidated statements of operations. (See Note 7.) • For equity interests without readily determinable fair values previously accounted for under the cost method, the Company has elected to apply the "measurement alternative" prospectively. Under this election, investments are recorded at cost, less impairment, adjusted for subsequent observable price changes as of the date that an observable transaction took place. The Company will recognize observable price changes as adjustments to fair values of these investments. (See Note 3 and Note 4.) In addition, companies are required to perform a qualitative assessment each reporting period to identify impairment under the single-step model. When a qualitative assessment indicates that an impairment exists, the Company will need to estimate the fair value of the investment and recognize in current earnings an impairment loss equal to the difference between the fair value and the carrying amount of the equity investment. • The Company evaluated the accounting for fair value call rights associated with its equity interests without readily determinable fair values and concluded that there is no change to the accounting for these investments. Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers ("Topic 606") and ASU 340-40, Other Assets and Deferred Costs, which updates numerous requirements in U.S. GAAP, including industry-specific requirements, and provides companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The guidance also addresses the accounting for costs incurred as part of obtaining or fulfilling a contract with a customer. The guidance in this Subtopic requires that costs of obtaining a contract be recognized as an asset and amortized as goods and services are transferred to the customer, as long as the costs are expected to be recovered. On January 1, 2018, the Company adopted ASC Topic 606 Revenue from Contracts with Customers using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts have not been adjusted and continue to be reported in accordance with our historic accounting under Topic 605. Following the modified retrospective approach for the adoption of this accounting guidance, the Company recorded an increase to opening retained earnings of $7 million as of January 1, 2018, due to the cumulative impact of adopting Topic 606. The impact relates to the capitalization of sales commissions for long-term education-based services. Expense amortized for the three months ended March 31, 2018 for capitalized sales commissions was recorded as part of costs of revenues. The impact to revenue and costs of revenues for the three months ended March 31, 2018 as a result of applying Topic 606 was immaterial. (See Note 11.) Income Taxes In October 2016, the FASB issued guidance that simplifies the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The new guidance includes requirements to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs, and therefore eliminates the exception for an intra-entity transfer of an asset other than inventory. The Company adopted the new standard effective January 1, 2018, and there was no material impact on the consolidated financial statements upon adoption. Clarifying the definition of a business On January 1, 2018 , the Company adopted new FASB guidance that amends the definition of a business and provides a threshold which must be considered to determine whether a transaction is an acquisition (or disposal) of an asset or a business. Under the previous accounting guidance, the minimum inputs and processes required for a “set” of assets and activities to meet the definition of a business is not specified. That lack of clarity has led to broad interpretations of the definition of a business. Under the new guidance, when substantially all of the fair value of gross assets acquired is concentrated in a single asset (or group of similar assets), the assets acquired would not represent a business. In addition, in order to be considered a business, an acquisition would have to include at a minimum an input and a substantive process that together significantly contribute to the ability to create an output. This guidance also narrows the definition of outputs by more closely aligning it with how outputs are described in the revenue recognition guidance. Compensation - Retirement Benefits On March 10, 2017 , the FASB issued new accounting guidance related to the presentation of net periodic pension costs and net periodic postretirement benefit costs, which requires employers sponsoring postretirement benefit plans to disaggregate the service cost component from the other components of net benefit cost. The standard also provides explicit guidance on how to present the service cost and other components of net benefit cost in the statement of operations and allows only the service cost component of net benefit cost to be eligible for capitalization. In conjunction with the acquisition of Scripps Networks, the Company evaluated the accounting for the qualified defined benefit pension plan ("Pension Plan") and the non-qualified unfunded Supplemental Executive Retirement Plan ("SERP"). As the Pension Plan was frozen effective December 31, 2009 and the Plan sponsor no longer grants credits to participants for service costs, the updated guidance on service costs is not applicable. The presentation as required by this guidance is reflected within the employee benefit plans footnote disclosures. (See Note 13.) Accounting and Reporting Pronouncements Not Yet Adopted Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued updated guidance which permits entities to reclassify tax effects stranded in accumulated other comprehensive income as a result of the 2017 Tax Cuts and Jobs Act ("TCJA") to retained earnings for each period in which the effect of the change is recorded. The update also requires entities to disclose their accounting policy for releasing income tax effects from accumulated other comprehensive income. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements. Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued significant amendments to hedge accounting which expand the eligibility for hedge accounting to more financial and nonfinancial hedging strategies. The guidance is intended to align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. In addition, the guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The updated guidance is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements. Goodwill Under the current accounting guidance, the quantitative goodwill impairment test is performed using a two-step process. The first step of the process is to compare the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not impaired and the second step of the quantitative impairment test is not necessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the quantitative goodwill impairment test is required to be performed to measure the amount of impairment loss, if any. The second step of the quantitative goodwill impairment test compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. In other words, the estimated fair value of the reporting unit’s identifiable net assets excluding goodwill is compared to the fair value of the reporting unit as if the reporting unit had been acquired in a business combination and the fair value of the reporting unit was the purchase price paid. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. In January 2017, the FASB issued guidance that simplifies the subsequent measurement of goodwill. The new guidance eliminates Step 2 from the goodwill impairment test, and eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. Therefore, an entity will recognize impairment charges for the amount by which the carrying amount exceeds the reporting unit's fair value, and the same impairment assessment applies to all reporting units. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017 . The amendments in this update must be adopted on a prospective basis for the annual or any interim goodwill impairment tests beginning after December 15, 2019 . Leases In February 2016 , the FASB issued guidance on leases that will require lessees to recognize almost all of their leases on the balance sheet by recording a right-of-use asset and liability. The new standard will be effective for reporting periods beginning after December 15, 2018 , and the new accounting guidance may be applied at the beginning of the earliest comparative period presented in the year of adoption or at effective date without applying the provisions of the new guidance to comparative periods presented. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements; however, it is expected that assets and liabilities will increase materially when operating leases are recorded under the new standard. The method of transition will be determined when the Company has completed its evaluation. Concentrations Risk Customers The Company has long-term contracts with distributors around the world. For the U.S. Networks segment, more than 95% of distribution revenue comes from the Company's largest 10 distributors in the U.S. For the International Networks segment, approximately 40% of distribution revenue comes from the Company's largest 10 distributors outside of the U.S. Agreements in place with the 10 largest cable and satellite operators in the U.S. Networks and International Networks expire at various times from 2018 through 2024 . Although the Company seeks to renew its agreements with its distributors prior to expiration of a contract, a delay in securing a renewal that results in a service disruption, a failure to secure a renewal or a renewal on less favorable terms may have a material adverse effect on the Company’s financial condition and results of operations. Not only could the Company experience a reduction in distribution revenue, but it could also experience a reduction in advertising revenue, as viewership is impacted by affiliate subscriber levels. No individual customer accounted for more than 10% of total consolidated revenues for the three months ended March 31, 2018 or 2017 . As of March 31, 2018 and December 31, 2017 , the Company’s trade receivables did not represent a significant concentration of credit risk as the customers and markets in which the Company operates are varied and dispersed across many geographic areas. Financial Institutions Cash and cash equivalents are maintained with several financial institutions. The Company has deposits held with banks that exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and, therefore, bear minimal credit risk. The Company performs periodic evaluations of the relative credit standing of the financial institutions and attempts to limit exposure with any one institution. Additionally, the Company has cash and cash equivalents held by its foreign subsidiaries. Under the TCJA, the Company is subject to U.S. taxes for the deemed repatriation of certain cash balances held by foreign corporations. The Company intends to continue to permanently reinvest these funds outside of the U.S., and current plans do not demonstrate a need to repatriate them to fund our U.S. operations. Lender Counterparties There is a risk that the counterparties associated with the Company’s revolving credit facility will not be available to fund as obligated under the terms of the facility and that the Company may, at the time of such unavailability to fund, have limited or no access to the commercial paper market. If funding under the revolving credit facility is unavailable, the Company may have to acquire a replacement credit facility from different counterparties at a higher cost or may be unable to find a suitable replacement. Typically, the Company seeks to manage such risks from its revolving credit facility by contracting with experienced large financial institutions and monitoring the credit quality of its lenders. As of March 31, 2018 , the Company did not anticipate nonperformance by any of its counterparties. Counterparty Credit Risk The Company is exposed to the risk that the counterparties to outstanding derivative financial instruments will default on their obligations. The Company manages these credit risks by evaluating and monitoring the creditworthiness of, and concentration of risk with, the respective counterparties. In this regard, credit risk associated with outstanding derivative financial instruments is spread across a relatively broad counterparty base of banks and financial institutions. In connection with the Company's economic hedge of certain investments classified as common stock investments with readily determinable fair value, the Company has pledged shares as collateral to the derivative counterparty. (See Note 3.) The Company also has a limited number of arrangements where collateral is required to be posted in the instance that certain fair value thresholds are exceeded. As of March 31, 2018 , $43 million of collateral has been posted by the Company under these arrangements and classified as other noncurrent assets in the consolidated balance sheets. As of March 31, 2018 , our exposure to counterparty credit risk included derivative assets with an aggregate fair value of $31 million . (See Note 4.)

Acquisitions and Dispositions

Acquisitions and Dispositions	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions and Dispositions	ACQUISITIONS AND DISPOSITIONS Acquisitions Scripps Networks Interactive, Inc. ("Scripps Networks") On March 6, 2018 , Discovery acquired Scripps Networks pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among Discovery, Scripps Networks and Skylight Merger Sub, Inc.; dated July 30, 2017 (the "acquisition of Scripps Networks"). The acquisition of Scripps Networks allows the Company to offer complementary brands with an extensive library of original programming to consumers and to create a scale player with the ability to compete for audiences and advertising revenue. The acquisition is intended to extend Scripps Networks' content to a broader international audience through Discovery's global distribution infrastructure. Finally, the acquisition of Scripps Networks is expected to create significant cost synergies for the Company. The consideration paid for the acquisition of Scripps Networks consisted of (i) for Scripps Networks shareholders that did not make an election or elected to receive the mixed consideration, $65.82 in cash and 1.0584 shares of Discovery Series C common stock for each Scripps Networks share, (ii) for Scripps Networks shareholders that elected to receive the cash consideration, $90.00 in cash for each Scripps Networks share, (iii) for Scripps Networks shareholders that elected to receive the stock consideration, 3.9392 shares of Discovery Series C common stock for each Scripps Networks share, subject to the terms and conditions set forth in the Merger Agreement and (iv) transaction costs related to amounts reimbursed by Discovery to Scripps Networks for costs incurred in conjunction with the acquisition. The following table summarizes the components of the aggregate consideration paid for the acquisition of Scripps Networks (in millions of dollars and shares, except for per share amounts, share conversion ratio and stock option conversion ratio) as of March 6, 2018 . Scripps Networks equity Scripps Networks shares outstanding 131 Cash consideration including collar payment (per Scripps Networks share) $ 65.82 Cash portion of purchase price $ 8,590 Scripps Networks shares outstanding 131 Share conversion ratio (per Scripps Networks share) 1.0584 Discovery Series C common stock 138 Discovery Series C common stock price per share $ 23.01 Equity portion of purchase price $ 3,179 Shares under Scripps Networks share-based compensation programs Shares under Scripps Networks share-based compensation programs 3 Scripps Networks share-based compensation converting to cash 2 Average cash consideration (per share less applicable exercise price) $ 46.90 Cash portion of purchase price $ 88 Scripps Networks share-based compensation awards 1 Share-based compensation conversion ratio (based on intrinsic value per award) 3 Discovery Series C common stock issued (1) or share-based compensation converted (2) 3 Average equity value (intrinsic value of Discovery Series C common stock or options to be issued) $ 15.19 Share-based compensation equity value $ 51 Less: post-combination compensation expense $ (12 ) Equity portion of consideration $ 39 Scripps Networks transaction costs paid by Discovery $ 117 Total consideration paid $ 12,013 Balances reflect rounding of dollar and share amounts to millions, which may result in differences for recalculated standalone amounts compared with the amounts presented above. The Company applied the acquisition method of accounting to Scripps Networks' business, whereby the excess of the fair value of the business over the fair value of identifiable net assets was allocated to goodwill. Goodwill reflects workforce and synergies expected from cost savings, operations and revenue enhancements of the combined company that are expected to result from the acquisition. The goodwill recorded as part of this acquisition has been provisionally allocated to the U.S. Networks and International Networks reportable segments in the amounts of $5.4 billion and $600 million , respectively, and is not amortizable for tax purposes. The preliminary opening balance sheet is subject to adjustment based on final assessment of the fair values of certain acquired assets, principally intangibles, equity method investments, content and income taxes. The Company used discounted cash flow ("DCF") analyses, which represent Level 3 fair value measurements, to assess certain components of its purchase price allocation. The fair value of equity interests previously held by Scripps Networks was determined using the discounted cash flow method. The fair value for trade-names and trademarks was determined using the relief from royalty method of the income approach; the remaining intangibles were determined using the excess earnings method of the income approach. The fair value of interest-bearing debt was determined using publicly-traded prices. The fair value estimates for the previously held equity interest and intangible assets are based on (i) projected discounted cash flows, (ii) historical and projected financial information, (iii) synergies including cost savings and (iv) attrition rates, as relevant, that market participants would consider when estimating fair values. As the Company finalizes the fair value of assets acquired and liabilities assumed, additional purchase price adjustments may be recorded during the measurement period. The Company will reflect measurement period adjustments, if any, in the period in which the adjustments occur. The preliminary fair value of assets acquired and liabilities assumed, as well as a reconciliation to cash consideration transferred is presented in the table below (in millions). Preliminary March 6, 2018 Accounts receivable $ 783 Other current assets 421 Content rights 1,088 Property and equipment 315 Goodwill 6,003 Intangible assets 9,175 Equity method investments, including note receivable 870 Other noncurrent assets 111 Current liabilities assumed (494 ) Debt assumed (2,481 ) Deferred income taxes (1,695 ) Other noncurrent liabilities (383 ) Noncontrolling interests (1,700 ) Total consideration paid $ 12,013 The table below presents a summary of intangible assets acquired and weighted average estimated useful life of these assets. Fair Value Weighted Average Useful Life in Years Trademarks and trade names $ 1,225 10 Advertiser relationships 4,995 10 Advertising backlog 280 1 Affiliate relationships 2,455 12 Broadcast licenses 220 6 Total intangible assets acquired $ 9,175 OWN On November 30, 2017 , the Company acquired from Harpo, Inc. ("Harpo") a controlling interest in the Oprah Winfrey Network ("OWN"), increasing Discovery’s ownership from 49.50% to 73.75% . OWN is a pay-TV network and website that provides adult lifestyle and entertainment content, which is focused on African Americans. Discovery paid $70 million in cash and recognized a gain of $33 million to account for the difference between the carrying value and the fair value of the previously held 49.50% equity interest. The price included an assessment of fair value of the equity interest in the network, subject to the impact of the note payable to Discovery. Discovery consolidated OWN under the VIE consolidation model upon closing of the transaction. Following the acquisition of the incremental equity interest and change to governance provisions, the Company has determined that it is now the primary beneficiary of OWN as Discovery obtained control of the Board of Directors and operational rights that significantly impact the economic performance of the business such as programming and marketing, and selection of key personnel. As a result, the accounting for OWN was changed from an equity method investment to a consolidated subsidiary. As the primary beneficiary, Discovery includes OWN's assets, liabilities and results of operations in the Company's consolidated financial statements. As of March 31, 2018 , the carrying amounts of assets and liabilities of the consolidated VIE were $733 million and $267 million , respectively. The Company applied the acquisition method of accounting to OWN’s business, whereby the excess of the fair value of the business over the fair value of identifiable net assets was allocated to goodwill. The goodwill reflects the workforce and synergies expected from broader exposure to the self-discovery and self-improvement entertainment sector. The goodwill recorded as part of this acquisition is included in the U.S. Network reportable segment and is not amortizable for tax purposes. Intangible assets consist of advertiser backlog, advertiser relationships and affiliate relationships with a weighted average estimated useful life of 9 years. The preliminary opening balance sheet is subject to adjustment based on final assessment of the fair values of contingent liabilities. The Company used DCF analyses, which represent Level 3 fair value measurements, to assess certain components of its purchase price allocation. The Company will reflect measurement period adjustments, if any, in the period in which the adjustment occurs. The preliminary fair value of assets acquired and liabilities assumed, as well as a reconciliation to cash consideration transferred is presented in the table below (in millions). Preliminary November 30, 2017 Intangible assets $ 295 Content rights 176 Accounts receivable 84 Other assets 26 Other liabilities (230 ) Net assets acquired $ 351 Goodwill 136 Remeasurement gain on previously held equity interest (33 ) Carrying value of previously held equity interest (329 ) Redeemable noncontrolling interest (55 ) Cash consideration transferred $ 70 Harpo has the right to require the Company to purchase its remaining non-controlling interest during 90-day windows beginning on July 1, 2018 and every two and half years thereafter through January 1, 2026. As OWN’s put right is outside the Company's control, OWN’s noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. (See Note 8.) The Enthusiast Network, Inc. On September 25, 2017 , the Company contributed its linear cable network focused on cars and motor sports, Velocity, to a new joint venture ("VTEN"), with GoldenTree Asset Management L.P. ("GoldenTree"). GoldenTree's contributions to the joint venture included businesses from The Enthusiast Network, Inc. ("TEN"), primarily MotorTrend.com, Motor Trend YouTube channel and the Motor Trend OnDemand OTT service. TEN did not contribute its print businesses to the joint venture. The joint venture has a portfolio of digital content, social groups, live events and original content focused on the automotive audience. In exchange for their contributions, Discovery and GoldenTree received 67.5% and 32.5% ownership of the new joint venture, respectively. Discovery consolidated the joint venture under the voting interest consolidation model upon the closing of the transaction. As the Company controlled Velocity and continues to control Velocity after the transaction, the change in the value of the Company's ownership interest was accounted for as an equity transaction and no gain or loss was recognized in the Company's consolidated statements of operations. The Company applied the acquisition method of accounting to TEN's contributed businesses, whereby the excess of the fair value of the contributed business over the fair value of identifiable net assets was allocated to goodwill. The goodwill reflects the workforce and synergies expected from broader exposure to the automotive entertainment sector. The goodwill recorded as part of this acquisition is included in the U.S. Network reportable segment and is not amortizable for tax purposes. Intangible assets primarily consist of trade names, licensing agreements and customer relationships with a weighted average estimated useful life of 16 years . The Company used DCF analyses, which represent Level 3 fair value measurements, to assess certain components of its purchase price allocation. The fair value of the assets acquired and liabilities assumed is presented in the table below (in millions). Preliminary September 25, 2017 Measurement Period Adjustments Final September 25, 2017 Goodwill $ 59 $ 16 $ 75 Intangible assets 71 (18 ) 53 Property plant and equipment, net 16 1 17 Other assets acquired 6 — 6 Liabilities assumed (8 ) 1 (7 ) Net assets acquired $ 144 $ — $ 144 Discovery has a fair value call right exercisable during 30 day windows beginning in September 2022 and March 2024 to require GoldenTree to sell its entire ownership interest in the joint venture to the Company at fair value. GoldenTree has a fair value put right exercisable during 30 day windows beginning in March 2021, September 2022 and March 2024 that requires Discovery to either purchase all of GoldenTree's interest in the joint venture at fair value or participate in an initial public offering for the joint venture. GoldenTree's 32.5% noncontrolling interest in the joint venture is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. The opening balance sheet value recognized for the redeemable noncontrolling interest upon closing was $82 million , based on GoldenTree's ownership interest in the book value of Velocity and fair value of GoldenTree's contribution. The balance was subsequently increased by $38 million to adjust the redemption value to fair value of $120 million . (See Note 8.) Other On March 2, 2018 , the Company acquired a sports broadcaster in Turkey for $5 million . On September 1, 2017 , the Company exercised its call right for the remaining outstanding equity in an equity method investment in a FTA company in Poland for $4 million . The operations of these entities were consolidated upon their acquisition dates. Pro Forma Financial Information The following unaudited pro forma information has been presented as if the Scripps Networks, OWN and VTEN transactions ("the Transactions") occurred on January 1, 2017. The information is based on the historical results of operations of the acquired businesses, adjusted for: 1. The allocation of purchase price and related adjustments, including adjustments to amortization expense related to the fair value of intangible assets acquired and the recognition of the noncontrolling interests; 2. Impacts of debt financing, including interest for debt issued and amortization associated with the fair value adjustments of debt assumed; 3. The exclusion of acquisition-related costs incurred during the three months ended March 31, 2018 and allocation of all acquisition-related costs to the three months ended March 31, 2017 . 4. Associated tax-related impacts of adjustments; and 5. Changes to align accounting policies The pro forma results do not necessarily represent what would have occurred if the Transactions had taken place on January 1, 2017, nor do they represent the results that may occur in the future. The pro forma adjustments were based on available information and upon assumptions that the Company believes are reasonable to reflect the impact of these acquisitions on the Company's historical financial information on a supplemental pro forma basis (in millions). Pro Forma Combined Three Months Ended March 31, 2018 2017 Revenues $ 2,930 $ 2,569 Net income available to Discovery, Inc. $ 107 $ 171 Net income per share - basic $ 0.10 $ 0.20 Net income per share - diluted $ 0.10 $ 0.20 Impact of Business Combinations The operations of each of the business combinations discussed above were included in the consolidated financial statements as of each of their respective acquisition dates. The following table presents their revenue and earnings as reported within the consolidated financial statements for the three months ended March 31, 2018 (in millions). Three Months Ended March 31, 2018 Revenues: Distribution $ 108 Advertising 244 Other 28 Total revenues $ 380 Net income $ (50 ) Dispositions Education Business Held for Sale On April 30, 2018 , the Company sold an 87.5% controlling equity stake in its education business to Francisco Partners for cash of $120 million subject to working capital adjustments. No loss occurred upon sale. As of March 31, 2018 , the Company determined that the education business met the held for sale criteria, as defined in GAAP. Given the relative size of the carrying amounts of the assets and liabilities of the education business, the Company has elected to disclose these amounts in this footnote in lieu of disclosure on the balance sheet. As of March 31, 2018 , the carrying amounts of assets and liabilities of the education business were $129 million and $80 million , respectively. The disposal will not meet the definition of discontinued operations, because the disposition does not represent a strategic shift that has a significant impact on the Company's operations and consolidated financial results. The Company retained a 12.5% equity interest in the business and will have ongoing license agreements which are considered to be at fair value.

Investments

Investments	3 Months Ended
	Mar. 31, 2018
Investments [Abstract]
Investments	INVESTMENTS The Company’s investments consisted of the following (in millions). Category Balance Sheet Location March 31, 2018 December 31, 2017 Cash equivalents: Time deposits Cash and cash equivalents $ — $ 1,305 Trading securities: Money market funds Cash and cash equivalents 39 2,707 Mutual funds Prepaid expenses and other current assets 237 182 Equity method investments Equity method investments, including note receivable 1,231 335 Common stock investments with readily determinable fair values Other noncurrent assets 126 164 Equity investments without readily determinable fair values Other noncurrent assets 374 295 Total investments $ 2,007 $ 4,988 Money Market Funds, Time Deposits and U.S. Treasury Securities During 2017, the Company issued $6.8 billion in senior notes to fund the March 6, 2018 acquisition of Scripps Networks. (See Note 2 and Note 6.) A portion of the proceeds were invested in various short-term investments prior to the acquisition of Scripps Networks, and were classified as cash and cash equivalents on the consolidated balance sheet. As of March 31, 2018 , the decrease in these funds is the result of funding the Scripps Networks acquisition. Mutual Funds Trading securities include investments in mutual funds held in separate trusts, which are owned as part of the Company’s supplemental retirement plans. (See Note 4.) Equity Method Investments The Company makes investments that support its underlying business strategy and enable it to enter new markets and develop programming. Certain of the Company's equity method investments are VIEs, for which the Company is not the primary beneficiary. As of March 31, 2018 , the Company’s maximum exposure for all its unconsolidated VIEs including the investment carrying values, unfunded contractual commitments, and guarantees made on behalf of VIEs was approximately $737 million . The Company's maximum estimated exposure excludes the non-contractual future funding of VIEs. The aggregate carrying values of these VIE investments were $692 million and $181 million as of March 31, 2018 and December 31, 2017 , respectively. The Company recognized its portion of VIE operating results with losses of $11 million and $43 million for the three months ended March 31, 2018 and 2017 , respectively. UKTV In connection with the acquisition of Scripps Networks, the Company acquired a 50% ownership interest in UKTV, a British multi-channel broadcaster jointly owned with BBC Studios (“BBC”). UKTV was formed on March 26, 1992, through a joint venture arrangement between BBC and Virgin Media Inc. ("VMED"). On August 11, 2011, Scripps Networks acquired VMED's 50% equity interest in UKTV along with a note receivable for debt instruments provided by VMED to UKTV. The Company has determined that UKTV is a VIE as the entity is unable to fund its activities without additional subordinated financial support provided by the note receivable. While the Company and BBC have equal voting rights in the management committee, the governing body of UKTV, power is not shared because BBC holds operational rights related to programming and creative development that significantly impact UKTV’s economic performance. Therefore, Discovery is not the primary beneficiary. The Company determined that its 50% equity interest in UKTV gives the Company the ability to exercise significant influence over the entity's operating and financial policies. Accordingly, the Company accounts for its investment in UKTV using the equity method. As of March 31, 2018 , the Company’s investment in UKTV totaled $506 million , including a note receivable of $103 million . nC+ In connection with the acquisition of Scripps Networks, the Company acquired a 32% ownership interest in nC+, a Polish satellite distributor of television content. nC+ is controlled by Group Canal+ S.A, a French broadcaster. The Company applies the equity method of accounting to its 32% investment in nC+ ordinary shares, which provide the ability to exercise significant influence over the operating and financial policies of nC+. The Company's investment in nC+ totaled $299 million as of March 31, 2018 . Renewable Energy Investments During the three months ended March 31, 2018 and 2017 , the Company invested $17 million and $181 million , respectively, in limited liability companies that sponsor renewable energy projects related to solar energy. The Company expects these investments to result in tax benefits, which would reduce the Company's future tax liability, and cash flows from the operations of the investees. These investments are considered VIEs of the Company. The Company accounts for these investments under the equity method of accounting. While the Company possesses rights that allow it to exercise significant influence over the investments, the Company does not have the power to direct the activities that will most significantly impact their economic performance, such as the investee's ability to obtain sufficient customers or control solar panel assets. Once a stipulated return on investment is earned by the Company, the investment allocations to the Company are significantly reduced. Accordingly, the Company applies the Hypothetical Liquidation at Book Value ("HLBV") methodology for allocating earnings, which is a generally accepted method under the equity method of accounting when a substantive profit sharing arrangement exists. During the three months ended March 31, 2018 and 2017 , the Company recognized $8 million and $83 million , respectively of net losses on renewable energy investments as part of loss from equity investees, net in the consolidated statements of operations. The Company recorded benefits of $2 million and $56 million associated with these investments during the three months ended March 31, 2018 and 2017 , respectively, that were recorded as a component of income tax benefit (expense) and operating cash flows. These benefits are comprised of $2 million from the entities' passive losses for the three months ended March 31, 2018 and $31 million from the entities' passive losses and $25 million from investment tax credits for the three months ended March 31, 2017 . The Company accounts for investment tax credits utilizing the flow through method. As of March 31, 2018 and December 31, 2017 , the Company's carrying value of renewable energy investments was $105 million and $98 million , respectively. The Company has $3 million of future funding commitments for these investments as of March 31, 2018 , which are cancelable under limited circumstances. The Company has concluded that losses incurred on these investments to-date are not indicative of an other-than-temporary impairment due to the nature of these investments. Losses in the early stages of investments in companies that sponsor renewable energy projects are not uncommon, and the Company expects improved performance from these investments in future periods. Other Equity Method Investments At March 31, 2018 and December 31, 2017 , the Company's other equity method investments included All3Media, a Russian cable television business, Mega TV in Chile and certain joint ventures in Canada. Other equity method investments acquired in conjunction with the Scripps Networks include joint ventures in Canada, and HGTV and Food Network Magazines. Investor Basis Differential With the exception of the OWN investment prior to the Company's November 30, 2017 consolidation (see Note 2), UKTV, nC+ and certain investments in renewable energy projects for which we use the HLBV methodology for allocating earnings, the carrying values of the Company’s remaining equity method investments are consistent with its ownership in the underlying net assets of the investees. A portion of the purchase prices of these investments were attributed to amortizable intangible assets, which are included in their carrying values. Earnings from our equity investees were reduced by amortization of $1 million during the period of March 6, 2018 to March 31, 2018 . Amortization that reduces the Company's equity in earnings of equity method investees for future periods is expected to be approximately $180 million . Summarized Financial Information The table set forth below presents selected statement of operations financial information for certain investments accounted for under the equity method. Because renewable energy projects discussed above are accounted for under the HLBV equity method of accounting, the Company's equity method losses do not directly correlate with the GAAP results of the investees presented below. The following are selected statement of operations information for each of the three months ended March 31, 2018 and 2017 (in millions). Three Months Ended March 31, 2018 2017 Selected statement of operations information: Revenues $ 286 $ 150 Costs of revenues 201 111 Operating income (loss) 12 (7 ) Pre-tax income (loss) from continuing operations before extraordinary items 7 (16 ) After-tax net income (loss) 4 (16 ) Net income (loss) attributable to the entity 4 (16 ) Common stock investments with readily determinable fair value The Company owns 5 million shares of common stock, or approximately 3% , of Lions Gate Entertainment Corp. ("Lionsgate"), an entertainment company. Lionsgate operates in the motion picture production and distribution, television programming and syndication, home entertainment and digital distribution business. Upon the adoption of ASU 2016-01, as the shares have a readily determinable fair value and the Company has the intent to retain the investment, the shares are measured at fair value, with realized gains and losses recorded in other expense, net. The accumulated amounts associated with the components of the Company's common stock investments with readily determinable fair values, which are included in other non-current assets, are summarized in the table below (in millions). March 31, 2018 December 31, 2017 Cost $ 195 $ 195 Accumulated change in the value of: Equity securities recognized in other expense, net (39 ) (1 ) Unhedged equity securities recorded in other comprehensive income (a) — 32 Reclassification of accumulated other comprehensive income to retained earnings (a) 32 — Other-than-temporary impairment (62 ) (62 ) Carrying value $ 126 $ 164 (a) As of January 1, 2018 , upon adoption of ASU 2016-01, the Company recorded a transition adjustment to reclassify accumulated other comprehensive income associated with Lionsgate shares in the amount of $32 million pre-tax ( $26 million , net of tax) to retained earnings. Previously, amounts were recorded as a component of other comprehensive income. The Company hedged 50% of the Lionsgate shares with an equity collar (the “Lionsgate Collar”) and pledged those shares as collateral to the derivative counterparty on November 12, 2015. Prior to adoption of ASU 2016-01, when the share price of Lionsgate was within the boundaries of the collar and the hedge had no intrinsic value, the Company recorded the gains or losses on the Lionsgate shares as a component of other comprehensive income (loss) . When the share price of the Lionsgate shares was outside the boundaries of the collar and the hedge had intrinsic value, the Company recorded the gains or losses resulting from a change in the fair value of the hedged portion of Lionsgate shares that correspond to the change in intrinsic value of the hedge as a component of other expense, net . Upon adoption of ASU 2016-01, the Lionsgate Collar no longer receives hedge accounting designation. There is no change to the manner in which movements in fair value of the Lionsgate Collar will be reflected in the financial statements as gains and losses will continue to be recorded as a component of other expense, net on the consolidated statements of operations. (See Note 1, Note 4 and Note 7.) In 2016 , the Company determined that the decline in value of equity securities related to its investment in Lionsgate was other-than-temporary in nature and, as such, the cost basis was adjusted to fair value. The impairment determination was based on the sustained decline in the stock price of Lionsgate in relation to the purchase price and the prolonged length of time the fair value of the investment had been less than the carrying value. Based on the other-than-temporary impairment determination, unrealized pre-tax losses of $62 million previously recorded as a component of other comprehensive income (loss) were recognized as an impairment charge that was included as a component of other expense, net for the quarter ended September 30, 2016 . Equity investments without readily determinable fair values assessed under the measurement alternative The Company's equity investments without readily determinable fair values assessed under the measurement alternative as of March 31, 2018 primarily include its 42% minority interest in Group Nine Media valued at $212 million . Discovery has significant influence through its voting rights in the preferred stock of Group Nine Media, however, this ownership interest has liquidation preferences that do not allow the investment to meet the definition of in-substance common stock. The Company accounts for its ownership interest in Group Nine Media as an equity investment without readily determinable fair values assessed under the measurement alternative. The Company also has similar investments in an educational website, an electric car racing series and certain investments to enhance the Company's digital distribution strategies, such as a $35 million investment in Refinery29. The Company completed its quarterly qualitative assessment and concluded that its equity investments without readily determinable fair values had no indicators that a change in fair value had taken place as of March 31, 2018 .

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair value is defined as the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants. Assets and liabilities carried at fair value are classified in the following three categories: Level 1 – Quoted prices for identical instruments in active markets. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Valuations derived from techniques in which one or more significant inputs are unobservable. The tables below present assets and liabilities measured at fair value on a recurring basis (in millions). March 31, 2018 Category Balance Sheet Location Level 1 Level 2 Level 3 Total Assets Trading securities: Money market funds Cash and cash equivalents $ 39 $ — $ — $ 39 Mutual funds Prepaid expenses and other current assets 237 — — 237 AFS securities: Common stock Other noncurrent assets 126 — — 126 Derivatives: Cash flow hedges: Foreign exchange Prepaid expenses and other current assets — 8 — 8 No hedging designation: (a) Equity (Lionsgate Collar) Other noncurrent assets — 23 — 23 Total $ 402 $ 31 $ — $ 433 Liabilities Deferred compensation plan Accrued liabilities $ 245 $ — $ — $ 245 Derivatives: Cash flow hedges: Foreign exchange Accrued liabilities — 20 — 20 Net investment hedges: Cross-currency swaps Accrued liabilities — 19 — 19 Cross-currency swaps Other noncurrent liabilities — 145 — 145 No hedging designation: Cross-currency swaps Accrued liabilities — 1 — 1 Cross-currency swaps Other noncurrent liabilities — 7 — 7 Total $ 245 $ 192 $ — $ 437 December 31, 2017 Category Balance Sheet Location Level 1 Level 2 Level 3 Total Assets Cash equivalents: Time deposits Cash and cash equivalents $ — $ 1,305 $ — $ 1,305 Trading securities: Money market funds Cash and cash equivalents 2,707 — — 2,707 Mutual funds Prepaid expenses and other current assets 182 — — 182 Equity investments with readily determinable fair value: (a) Common stock Other noncurrent assets 82 — — 82 Common stock - pledged Other noncurrent assets 82 — — 82 Derivatives: Cash flow hedges: Foreign exchange Prepaid expenses and other current assets — 7 — 7 Net investment hedges: Cross-currency swaps Other noncurrent assets — 3 — 3 Foreign exchange Prepaid expenses and other current assets — 2 — 2 Fair value hedges: (a) Equity (Lionsgate Collar) Other noncurrent assets — 13 — 13 Total $ 3,053 $ 1,330 $ — $ 4,383 Liabilities Deferred compensation plan Accrued liabilities $ 182 $ — $ — $ 182 Derivatives: Cash flow hedges: Foreign exchange Accrued liabilities — 12 — 12 Net investment hedges: Cross-currency swaps Accrued liabilities — 13 — 13 Cross-currency swaps Other noncurrent liabilities — 98 — 98 Foreign exchange Accrued liabilities — 8 — 8 No hedging designation: Credit contracts Other noncurrent liabilities — 1 — 1 Cross-currency swaps Other noncurrent liabilities — 6 — 6 Total $ 182 $ 138 $ — $ 320 (a) Prior to January 1, 2018, and the adoption of ASU 2016-01, the Company applied hedge accounting to the Lionsgate Collar. (See Note 1 and Note 7.) Cash obtained as a result of the issuance of senior notes to fund a portion of the purchase price of the Scripps Networks acquisition was invested in money market funds, time deposit accounts, U.S. Treasury securities and highly liquid short-term instruments that qualify as cash and cash equivalents. Any accrued interest received after maturity was reinvested into additional short-term instruments. (See Note 3.) The Company values cash and cash equivalents using quoted market prices. As of March 31, 2018 , following the acquisition of Scripps Networks, the Company no longer holds these investments as these investments were liquidated and utilized in the acquisition of Scripps Networks. The fair value of Level 1 trading securities was determined by reference to the quoted market price per share in active markets multiplied by the number of shares held without consideration of transaction costs. (See Note 3.) The fair value of the deferred compensation plan liability was determined based on the fair value of the related investments elected by employees. Changes in the fair value of the investments are offset by changes in the fair value of the deferred compensation obligation. (See Note 3.) Common stock investments represent equity investments with readily determinable fair values. The fair value of Level 1 common stock investments was determined by reference to the quoted market price per unit in active markets multiplied by the number of units held without consideration of transaction costs. (See Note 3.) As of January 1, 2018 , the Company adopted ASU 2016-01, which eliminates the AFS classification. (See Note 1 and Note 3.) Derivative financial instruments are comprised of foreign exchange, interest rate, credit and equity contracts. (See Note 7.) The fair value of Level 2 derivative financial instruments was determined using a market-based approach. In addition to the financial instruments listed in the tables above, the Company holds other financial instruments, including cash deposits, accounts receivable, accounts payable, borrowings under the revolving credit facility and senior notes. The carrying values for such financial instruments, other than the senior notes, each approximated their fair values as of March 31, 2018 and December 31, 2017 . The estimated fair value of the Company’s outstanding senior notes using quoted prices from over the counter markets, considered Level 2 inputs, was $16.9 billion and $14.8 billion as of March 31, 2018 and December 31, 2017 , respectively.

Content Rights

Content Rights	3 Months Ended
	Mar. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Content Rights	CONTENT RIGHTS The table below presents the components of content rights (in millions). March 31, 2018 December 31, 2017 Produced content rights: Completed $ 5,299 $ 4,355 In-production 690 442 Coproduced content rights: Completed 757 745 In-production 65 27 Licensed content rights: Acquired 1,078 1,070 Prepaid (a) 187 181 Content rights, at cost 8,076 6,820 Accumulated content rights expense (4,334 ) (4,197 ) Total content rights, net 3,742 2,623 Current portion (419 ) (410 ) Noncurrent portion $ 3,323 $ 2,213 (a) Prepaid licensed content rights includes payments for rights to the Olympic games of $61 million that are reflected as noncurrent content rights and $83 million that are reflected as current content rights assets on the consolidated balance sheet as of March 31, 2018 and December 31, 2017 , respectively.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT The table below presents the components of outstanding debt (in millions). March 31, 2018 December 31, 2017 5.625% Senior notes, semi-annual interest, due August 2019 $ 411 $ 411 2.200% Senior notes, semi-annual interest, due September 2019 500 500 Floating rate notes, quarterly interest, due September 2019 400 400 2.750% Senior notes, semi-annual interest, due November 2019 500 — 2.800% Senior notes, semi-annual interest, due June 2020 600 — 5.050% Senior notes, semi-annual interest, due June 2020 789 789 4.375% Senior notes, semi-annual interest, due June 2021 650 650 2.375% Senior notes, euro denominated, annual interest, due March 2022 370 358 3.300% Senior notes, semi-annual interest, due May 2022 500 500 3.500% Senior notes, semi-annual interest, due June 2022 400 — 2.950% Senior notes, semi-annual interest, due March 2023 1,200 1,200 3.250% Senior notes, semi-annual interest, due April 2023 350 350 3.800% Senior notes, semi-annual interest, due March 2024 450 450 2.500% Senior notes, sterling denominated, annual interest, due September 2024 563 538 3.900% Senior notes, semi-annual interest, due November 2024 500 — 3.450% Senior notes, semi-annual interest, due March 2025 300 300 3.950% Senior notes, semi-annual interest, due June 2025 500 — 4.900% Senior notes, semi-annual interest, due March 2026 700 700 1.900% Senior notes, euro denominated, annual interest, due March 2027 739 717 3.950% Senior notes, semi-annual interest, due March 2028 1,700 1,700 5.000% Senior notes, semi-annual interest, due September 2037 1,250 1,250 6.350% Senior notes, semi-annual interest, due June 2040 850 850 4.950% Senior notes, semi-annual interest, due May 2042 500 500 4.875% Senior notes, semi-annual interest, due April 2043 850 850 5.200% Senior notes, semi-annual interest, due September 2047 1,250 1,250 Term loans 2,000 — Revolving credit facility 425 425 Program financing line of credit 22 — Capital lease obligations 244 225 Total debt 19,513 14,913 Unamortized discount, premium and debt issuance costs, net (146 ) (128 ) Debt, net of unamortized discount, premium and debt issuance costs 19,367 14,785 Current portion of debt (153 ) (30 ) Noncurrent portion of debt $ 19,214 $ 14,755 Senior Notes In connection with the acquisition of Scripps Networks on March 6, 2018 , the Company assumed $2.5 billion aggregate principal amount of Scripps Networks 2.750% senior notes due 2019 , 2.800% senior notes due 2020 , 3.500% senior notes due 2022 , 3.900% senior notes due 2024 and 3.950% senior notes due 2025 (the "Scripps Networks Senior Notes"). As part of accounting for the acquisition of Scripps Networks, the Scripps Networks Senior Notes were adjusted to fair value using observable trades as of the acquisition date. (See Note 2.) The fair value adjustment resulted in an opening balance sheet carrying value that is $19 million less than the face amount of the senior notes. This difference will be amortized to interest expense until maturity. On April 3, 2018 , pursuant to the Offering Memorandum and Consent Solicitation Statement to Exchange dated March 5, 2018, Discovery Communications, LLC ("DCL"), a wholly-owned subsidiary of the Company, completed the exchange of $2.3 billion aggregate principal amount of Scripps Networks Senior Notes, for equivalent $2.3 billion aggregate principal amount 2.750% senior notes due 2019 (the "2019 Notes"), 2.800% senior notes due 2020 (the "2020 Notes"), 3.500% senior notes due 2022 (the "2022 Notes"), 3.900% senior notes due 2024 (the "2024 Notes") and 3.950% senior notes due 2025 . Interest on the 2019 Notes and the 2024 Notes is payable semi-annually in arrears on May 15 and November 15 of each year beginning on May 15, 2018. Interest on the 2020 Notes, the 2022 Notes and the 2025 Notes is payable semi-annually in arrears on June 15 and December 15 of each year commencing on June 15, 2018. In connection with this transaction, Scripps Networks Interactive, Inc., a wholly-owned subsidiary of the Company, fully and unconditionally guaranteed these senior notes (See Note 21.) These notes are unsecured and rank equally in right of payment with all of DCL’s other unsecured senior indebtedness. The exchange will be accounted for as a debt modification and therefore all third-party issuance costs will be expensed as incurred. The unexchanged Scripps Networks Senior Notes with an aggregate principal balance of $243 million will lose certain covenants or guarantees. On September 21, 2017 , DCL issued $500 million principal amount of 2.200% senior notes due 2019, $1.20 billion principal amount of 2.950% senior notes due 2023, $1.70 billion principal amount of 3.950% senior notes due 2028, $1.25 billion principal amount of 5.000% senior notes due 2037, $1.25 billion principal amount of 5.200% senior notes due 2047 (collectively, the “Senior Fixed Rate Notes”) and $400 million principal amount of floating rate senior notes due 2019 (the “Senior Floating Rate Notes” and, together with the Senior Fixed Rate Notes, the “USD Notes”). Interest on the Senior Fixed Rate Notes is payable on March 20 and September 20 of each year. Interest on the Senior Floating Rate Notes is payable on March 20, June 20, September 20 and December 20 of each year. The USD Notes are fully and unconditionally guaranteed by the Company. On September 21, 2017, DC L also issued £400 million principal amount ( $540 million at issuance based on the exchange rate of $1.35 per pound at September 21, 2017) of 2.500% senior notes due 2024 (the “Sterling Notes”). Interest on the Sterling Notes is payable on September 20 of each year, beginning September 20, 2018. The proceeds received by DCL from the USD Notes and the Sterling Notes were net of a $11 million issuance discount and $57 million of debt issuance costs. On March 13, 2017 , DCL issued $ 450 million principal amount of 3.80% senior notes due March 13, 2024 (the "2017 USD Notes") and an additional $200 million principal amount of its existing 4.90% senior notes due March 11, 2026 (the "2016 USD Notes"). Interest on the 2017 USD Notes is payable semi-annually on March 13 and September 13 of each year. Interest on the 2016 USD Notes is payable semi-annually on March 11 and September 11 of each year. The proceeds received by DCL from the 2017 USD Notes were net of a $1 million issuance discount and $4 million of debt issuance costs. The proceeds received by DCL from the 2016 USD Notes included a $10 million issuance premium and were net of $2 million of debt issuance costs. DCL used the proceeds from the offerings of the 2017 USD Notes and the 2016 USD Notes to repurchase $600 million aggregate principal amount of DCL's 5.050% senior notes due 2020 and 5.625% senior notes due 2019 in a cash tender offer. The repurchase resulted in a pretax loss on extinguishment of debt of $54 million for the three months ended March 31, 2017 , which is presented as a separate line item on the Company's consolidated statements of operations and recognized as a component of financing cash outflows on the consolidated statements of cash flows. The loss included $50 million for premiums to par value, $2 million of non-cash write-offs of unamortized deferred financing costs, $1 million for the write-off of the original issue discount of these senior notes and $1 million accrued for other third-party fees. With the exception of the $2.5 billion of Scripps Networks Senior Notes acquired in conjunction with the acquisition of Scripps Networks, as of March 31, 2018 , the remaining senior notes are fully and unconditionally guaranteed by the Company. Term Loans On August 11, 2017, DCL entered into a three -year delayed draw tranche and a five -year delayed draw tranche unsecured term loan credit facility (the "Term Loans"), each with a principal amount of up to $1 billion . The term of each delayed draw loan commenced on March 6, 2018 when Discovery used these funds to finance a portion of the Scripps Networks acquisition. The Term Loans' interest rates are based, at the Company's option, on either adjusted LIBOR plus a margin, or an alternate base rate plus a margin. The Company paid a commitment fee of 20 basis points per annum for each loan, based on its then-current credit rating, beginning September 28, 2017 through March 6, 2018 . As of March 31, 2018 , the Company had an outstanding balance of $2 billion under the Term Loan. Revolving Credit Facility On August 11, 2017 , DCL amended its $2.0 billion revolving credit facility to allow DCL and certain designated foreign subsidiaries of DCL to borrow up to $2.5 billion , including a $100 million sublimit for the issuance of standby letters of credit and a $50 million sublimit for Euro-denominated swing line loans. Borrowing capacity under this credit facility is reduced by any outstanding borrowings under the commercial paper program. There were no outstanding borrowings of commercial paper for the periods ended March 31, 2018 and December 31, 2017 . The revolving credit facility agreement amendment extends the maturity date from February 4, 2021 to August 11, 2022 . The original agreement includes the option for up to two additional 364 -day renewal periods. The credit agreement governing the revolving credit facility contains customary representations, warranties and events of default, as well as affirmative and negative covenants. In addition to the change in the revolver's capacity, on August 11, 2017 , the financial covenants were modified to increase the maximum consolidated leverage ratio financial covenant to 5.50 to 1.00 , with step-downs to 5.00 to 1.00 and to 4.50 to 1.00 , one year and two years after the closing of the Scripps Networks acquisition, respectively. As of March 31, 2018 , the Company's subsidiary, DCL, was in compliance with all covenants and there were no events of default under the revolving credit facility. As of March 31, 2018 , the Company had outstanding U.S. dollar-denominated borrowings under the revolving credit facility of $425 million at a weighted average interest rate of 3.14% . As of December 31, 2017 , the Company had outstanding U.S. dollar-denominated borrowings under the revolving credit facility of $425 million at a weighted average interest rate of 2.69% . The interest rate on borrowings under the revolving credit facility is variable based on DCL's then-current credit ratings for its publicly traded debt and changes in financial index rates. For U.S. dollar-denominated borrowings, the interest rate is based, at the Company's option, on either adjusted LIBOR plus a margin, or an alternate base rate plus a margin. The Company may also borrow in foreign currencies under the credit facility, at an interest rate based on adjusted LIBOR, plus a margin. The current margins are 1.30% and 0.30% , respectively, per annum for adjusted LIBOR and alternate base rate borrowings. The Company had no borrowings under the credit facility in foreign currencies as of March 31, 2018 or December 31, 2017 . A monthly facility fee is charged based on the total capacity of the facility, and interest is charged based on the amount borrowed on the facility. The current facility fee rate is 0.20% per annum and subject to change based on DCL's then-current credit ratings. All obligations of DCL and the other borrowers under the revolving credit facility are unsecured and are fully and unconditionally guaranteed by Discovery. Program Financing Line of Credit On January 12, 2018 , the Company entered into a secured line of credit for an aggregate principal amount of $26 million to finance content production costs. Interest rates on this line of credit are based on the Company’s option to elect either an adjusted LIBOR or a variable prime rate. Interest on the outstanding balance is due quarterly commencing on October 15, 2018 with a final payment due on October 15, 2020 . As of March 31, 2018 , the Company has an outstanding balance of $22 million .

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTS The Company uses derivative financial instruments to modify its exposure to market risks from changes in foreign currency exchange rates and interest rates. At the inception of a derivative contract, the Company designates the derivative as one of four types based on the Company's intentions and belief as to its likely effectiveness as a hedge. These four types are: (1) a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability ("cash flow hedge"), (2) a hedge of net investments in foreign operations ("net investment hedge"), (3) a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment ("fair value hedge"), or (4) an instrument with no hedging designation. The Company does not enter into or hold derivative financial instruments for speculative trading purposes. Unsettled derivative contracts are recorded at their gross fair values on the consolidated balance sheets. (See Note 4.) The portion of the fair value that represents cash flows occurring within one year are classified as current, and the portion related to cash flows occurring beyond one year are classified as noncurrent. Gains and losses on the effective portions of designated cash flow and net investment hedges are initially recognized as components of accumulated other comprehensive loss on the consolidated balance sheets and reclassified into the statements of operations in the same line item in which the hedged item is recorded and in the same period as the hedged item affects earnings. The ineffective portion of any previous gains and losses recorded in accumulated other comprehensive loss on the consolidated balance sheets are reclassified immediately to other expense, net on the consolidated statements of operations. The Company recorded gains and losses for instruments that receive no hedging designation, as a component of other expense, net on the consolidated statements of operations. The cash flows from the effective portion of derivative instruments used as hedges are classified in the consolidated statements of cash flows in the same section as the cash flows of the hedged item. Effective January 1, 2018 , upon adoption of ASU 2016-01, the Company no longer applies hedge accounting to the Lionsgate Collar. There is no change to the manner in which the Company accounts for the collar as movements in fair value of the collar will continue to be recorded as a component of other expense, net on the consolidated statements of operations. (See Note 1 and Note 4.) The following table summarizes the impact of derivative financial instruments on the Company's consolidated balance sheets (in millions). There were no amounts eligible to be offset under master netting agreements as of March 31, 2018 and December 31, 2017 . March 31, 2018 December 31, 2017 Fair Value Fair Value Notional Prepaid expenses and other current assets Other non- current assets Accrued liabilities Other non- current liabilities Notional Prepaid expenses and other current assets Other non- current assets Accrued liabilities Other non- current liabilities Cash flow hedges: Foreign exchange $ 806 $ 8 $ — $ 20 $ — $ 817 $ 7 $ — $ 12 $ — Net investment hedges: (a) Cross-currency swaps 1,737 — — 19 145 1,708 — 3 13 98 Foreign exchange — — — — — 303 2 — 8 — Fair value hedges: Equity (Lionsgate collar) (b) — — — — — 97 — 13 — — No hedging designation: Interest rate swaps 25 — — — — 25 — — — — Cross-currency swaps 64 — — 1 7 64 — — — 6 Equity (Lionsgate collar) (b) 97 — 23 — — — — — — — Credit contracts — — — — — 665 — — — 1 Total $ 8 $ 23 $ 40 $ 152 $ 9 $ 16 $ 33 $ 105 (a) Excludes £400 million of sterling notes ( $563 million equivalent at March 31, 2018 ) designated as a net investment hedge. (See Note 6.) (b) Effective January 1, 2018, upon adoption of ASU 2016-01, the Lionsgate Collar no longer receives the hedge accounting designation. (See Note 1 and Note 4.) The following table presents the pretax impact of derivatives designated as cash flow hedges on income and other comprehensive income (loss) (in millions). Three Months Ended March 31, 2018 2017 Losses recognized in accumulated other comprehensive loss: Foreign exchange - derivative adjustments $ (10 ) $ (13 ) Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion): Foreign exchange - distribution revenue — (3 ) Foreign exchange - advertising revenue 1 — Foreign exchange - costs of revenues (4 ) 4 Interest rate - interest expense — (1 ) If current fair values of designated cash flow hedges as of March 31, 2018 remained static over the next twelve months, the Company would reclassify $13 million of net deferred losses from accumulated other comprehensive loss into income in the next twelve months. The following table presents the pretax impact of derivatives designated as net investment hedges on other comprehensive income (loss) (in millions). Three Months Ended March 31, 2018 2017 Currency translation adjustments: Cross-currency swaps - changes in fair value $ (56 ) $ (9 ) Cross-currency swaps - interest settlements 7 5 Foreign exchange - changes in fair value (1 ) — Sterling Notes - changes in foreign exchange rates (25 ) — Total other comprehensive loss $ (75 ) $ (4 ) The following table presents the pretax impact of derivatives designated as fair value hedges on income, including offsetting changes in fair value of the hedged items and amounts excluded from the assessment of effectiveness (in millions). Upon adoption of ASU 2016-01 on January 1, 2018 , the Company no longer designated any of its derivatives as fair value hedges. As a result, there was no activity related to derivatives designated as fair value hedges for the three months ended March 31, 2018 . There were no amounts of ineffectiveness recognized on fair value hedges for the three months ended March 31, 2017 . Three Months Ended March 31, 2017 Gains on changes in fair value of hedged AFS $ — Gains on changes in the intrinsic value of equity contracts — Fair value of equity contracts excluded from effectiveness assessment (2 ) Total in other expense, net $ (2 ) The following table presents the pretax impact of derivatives not designated as hedges and recognized in other expense, net in the consolidated statements of operations (in millions). Three Months Ended March 31, 2018 2017 Cross-currency swaps $ (4 ) $ (1 ) Credit contracts (1 ) — Equity 10 — Total in other expense, net $ 5 $ (1 )

Redeemable Noncontrolling Inter

Redeemable Noncontrolling Interests	3 Months Ended
	Mar. 31, 2018
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interests	REDEEMABLE NONCONTROLLING INTERESTS The table below presents the reconciliation of changes in redeemable noncontrolling interests (in millions). Three Months Ended March 31, 2018 2017 Beginning balance $ 413 $ 243 Cash distributions to redeemable noncontrolling interests (2 ) (3 ) Comprehensive income adjustments: Net income attributable to redeemable noncontrolling interests 6 6 Other comprehensive income attributable to redeemable noncontrolling interests — 1 Currency translation on redemption values 2 1 Retained earnings adjustments: Adjustments of redemption values to the floor — 1 Ending balance $ 419 $ 249 Redeemable noncontrolling interests consist of the arrangements described below: In connection with its non-controlling interest in OWN, Harpo has the right to require the Company to purchase its remaining non-controlling interest during 90-day windows beginning on July 1, 2018 and every two and a half years thereafter through January 1, 2026. As OWN’s put right is outside the control of the Company, OWN’s noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded $56 million for the redeemable noncontrolling interest in equity associated with the value of OWN. (See Note 2.) In connection with the joint venture created between Discovery and GoldenTree on September 25, 2017 , GoldenTree acquired a put right exercisable during 30-day windows beginning in March 2021, September 2022 and March 2024 that requires Discovery to either purchase all of GoldenTree's 32.5% interest in the joint venture at fair value or participate in an initial public offering for the joint venture. As the put right is outside of the Company's control, GoldenTree's 32.5% noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded a redeemable noncontrolling interest of $82 million and an adjustment to redemption value of $38 million for VTEN's put right. (See Note 2.) In connection with its non-controlling interest in Discovery Family, Hasbro Inc. ("Hasbro") has the right to put the entirety of its remaining 40% non-controlling interest to the Company for one year after December 31, 2021 , or in the event a Discovery performance obligation related to Discovery Family is not met. Embedded in the redeemable noncontrolling interest is also a Discovery call right that is exercisable for one year after December 31, 2021 . Upon the exercise of the put or call options, the price to be paid for the redeemable noncontrolling interest is generally a function of the then-current fair market value of the redeemable noncontrolling interest, to which certain discounts and floor values may apply in specified situations depending upon the party exercising the put or call and the basis for the exercise of the put or call. As Hasbro's put right is outside the control of the Company, Hasbro's 40% noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded $215 million for the redeemable noncontrolling interest in equity of Discovery Family. In connection with its non-controlling interest in Discovery Japan, Jupiter Telecommunications Co., Ltd ("J:COM") has the right to put all, but not less than all, of its 20% noncontrolling interest to Discovery at any time for cash. As amended, through January 10, 2018, the redemption value is the January 10, 2013 , fair value denominated in Japanese yen; thereafter, as chosen by J:COM, the redemption value is the then-current fair value or the January 10, 2013 , fair value denominated in Japanese yen. As of March 31, 2018, the Company recorded $28 million for the redeemable noncontrolling interest in equity of Discovery Japan. Redeemable noncontrolling interests reflected as of the balance sheet date are the greater of the noncontrolling interest balances adjusted for comprehensive income items and distributions or the redemption values remeasured at the period end foreign exchange rates (i.e., the "floor"). Adjustments to the carrying amount of redeemable noncontrolling interests to redemption value as a result of changes in exchange rates are reflected in currency translation adjustments, a component of other comprehensive income (loss) ; however, such currency translation adjustments to redemption value are allocated to Discovery stockholders only. Redeemable noncontrolling interest adjustments of redemption value to the floor are reflected in retained earnings. NONCONTROLLING INTEREST In conjunction with the acquisition of Scripps Networks, the Company acquired a controlling interest in the TV Food Network Partnership ("the Partnership"), which is jointly owned with Tribune Media Company (the "Tribune Company"). Food Network and Cooking Channel are operated and organized under the terms of the Partnership. The Company holds 80% of the voting interest and 68.7% of the economic interest in the Partnership. Under the terms of the Partnership, the Partnership has a dissolution date of December 31, 2020. If the term of the Partnership is not extended prior to that date, the Partnership agreement permits the Company, as holder of 80% of the applicable votes, to reconstitute the Partnership and continue its business. If for some reason the Partnership is not continued, it will be required to limit its activities to winding up, settling debts, liquidating assets and distributing proceeds to the partners in proportion to their partnership interests. Ownership interests attributable to the Tribune Company are presented as noncontrolling interests on the Company's consolidated financial statements. Under the terms of the Partnership, Tribune Company cannot force a redemption outside of the Company's control. As such, the noncontrolling interests are reflected as a component of permanent equity in the Company's consolidated financial statements.

Equity

Equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Equity	EQUITY Common Stock Issued in Connection with Scripps Networks Acquisition On March 6, 2018 , the Company issued 139 million shares of Series C common stock as part of the consideration paid for the acquisition of Scripps Networks, inclusive of the conversion of 1 million Scripps Networks share-based compensation awards. (See Note 2.) Repurchase Programs Common Stock On August 3, 2010 , the Company implemented a stock repurchase program. Under the Company's stock repurchase program, management was authorized to purchase shares of the Company's common stock from time to time through open market purchases, privately negotiated transactions at prevailing prices, pursuant to one or more accelerated stock repurchase agreements, or other derivative arrangements as permitted by securities laws and other legal requirements, and subject to stock price, business and market conditions and other factors. The Company's authorization under the program expired on October 8, 2017 . All common stock repurchases, including prepaid common stock repurchase contracts, have been made through open market transactions and have been recorded as treasury stock on the consolidated balance sheet. As of March 31, 2018 , the Company had repurchased over the life of the program 3 million and 164 million shares of Series A and Series C common stock, respectively, for an aggregate purchase price of $171 million and $6.6 billion , respectively. The table below presents a summary of common stock repurchases (in millions). Three Months Ended March 31, 2018 2017 Series C Common Stock: Shares repurchased — 5.2 Purchase price $ — $ 140 Convertible Preferred Stock and Preferred Stock Modification The Company has two series of preferred stock authorized, issued and outstanding as of March 31, 2018 : Series A-1 convertible preferred stock and Series C-1 convertible preferred stock. There are 8 million shares authorized for Series A-1 convertible preferred stock and 6 million shares authorized for Series C-1 convertible preferred stock. On August 7, 2017 , Discovery completed the transactions contemplated by the Exchange Agreement with Advance/Newhouse. Under the Exchange Agreement, Discovery issued a number of shares of newly designated Series A-1 and Series C-1 convertible preferred stock (collectively, the "New Preferred Stock") to Advance/Newhouse in exchange for all outstanding shares of Discovery Series A and Series C convertible participating preferred stock (the "Exchange"). The terms of the Exchange Agreement resulted in Advance/Newhouse's aggregate voting and economic rights before the exchange being equal to its aggregate voting and economic rights after the exchange. Immediately following the Exchange, Advance/Newhouse’s beneficial ownership of the aggregate number of shares of Discovery’s Series A common stock and Series C common stock into which the New Preferred Stock received by Advance/Newhouse in the Exchange are convertible, remained unchanged. The terms of the exchange agreement also provide that certain of the shares of Discovery Series C-1 convertible preferred stock received by Advance/Newhouse in the Exchange (including the Discovery Series C common stock into which such shares are convertible) are subject to transfer restrictions on the terms set forth in the Exchange Agreement. While subject to transfer restrictions, such shares may be pledged in certain bona fide financing transactions, but may not be pledged in connection with hedging or similar transactions. Prior to the Exchange each share of Series A preferred stock was convertible into one share of Series A common stock and one share of Series C common stock (referred to as the “embedded Series C common stock”). Through its ownership of the Series A convertible preferred stock, Advance/Newhouse had the right to elect three directors (the “preferred directors”) and maintained special voting rights on certain matters, including but not limited to blocking rights for material acquisitions, the issuance of debt securities and the issuance of equity securities (collectively, the “preferred rights”). Additionally, Advance/Newhouse was subject to certain transfer restrictions with respect to its governance rights. Prior to the Exchange, the Series C convertible preferred stock was considered the economic equivalent of Series C common stock. Following the Exchange, shares of Series A-1 preferred stock and Series C-1 preferred stock are convertible into Series A common stock and Series C common stock, respectively. The aforementioned preferred rights and transfer restrictions are retained as features of the Series A-1 preferred stock, and holders of Series A-1 preferred stock are now subject to a right of first offer in favor of Discovery should Advance/Newhouse desire to sell 80% or more of the Series A-1 shares in a “Permitted Transfer” (as defined in the Discovery charter). Following the Exchange, Series C-1 convertible preferred stock is considered the economic equivalent of Series C common stock and is subject to certain transfer restrictions. Discovery considers the Exchange of the Series A convertible preferred stock for Series A-1 convertible preferred stock and Series C-1 convertible preferred stock to be a modification to the conversion option of the Series A convertible preferred stock. Previously, conversion of Series A preferred stock required simultaneous conversion into Series A common stock and Series C common stock. The Exchange, however, allows for the independent conversion of the Series C-1 convertible preferred stock into Series C common stock without the conversion of Series A-1 convertible preferred stock. Advance/Newhouse’s aggregate voting, economic and preferred rights before the Exchange are equal to its aggregate voting, economic and preferred rights after the Exchange. As of March 31, 2018 , all outstanding shares of Series A-1 and Series C-1 convertible preferred stock were held by Advance/Newhouse. Consistent with the terms of the arrangement prior to the Exchange, holders of Series A-1 and Series C-1 convertible preferred stock have equal rights, powers and privileges, except as otherwise noted. Except for the election of common stock directors, the holders of Series A-1 convertible preferred stock are entitled to vote on matters to which holders of Series A and Series B common stock are entitled to vote, and holders of Series C-1 convertible preferred stock are entitled to vote on matters to which holders of Series C common stock, which is generally non-voting, are entitled to vote pursuant to Delaware law. Series A-1 convertible preferred stockholders vote on an as converted to common stock basis together with the Series A and Series B common stockholders as a single class on all matters except the election of directors. Additionally, through its ownership of the Series A-1 convertible preferred stock, Advance/Newhouse has special voting rights on certain matters and the right to elect three directors. Holders of the Company’s common stock are not entitled to vote in the election of such directors. Advance/Newhouse retains these rights so long as it or its permitted transferees own or have the right to vote such shares that equal at least 80% of the shares of Series A-1 convertible preferred stock issued to Advance/Newhouse in connection with the formation of Discovery plus any Series A-1 convertible preferred stock released from escrow, as may be adjusted for certain capital transactions. Subject to the prior preferences and other rights of any senior stock, holders of Series A-1 and Series C-1 convertible preferred stock will participate equally with common stockholders on an as converted to common stock basis in any cash dividends declared by the Board of Directors. In the event of a liquidation, dissolution or winding up of Discovery, after payment of Discovery’s debts and liabilities and subject to the prior payment with respect to any stock ranking senior to Series A-1 and Series C-1 convertible preferred stock, the holders of Series A-1 and Series C-1 convertible preferred stock will receive, before any payment or distribution is made to the holders of any common stock or other junior stock, an amount (in cash or property) equal to $0.01 per share. Following payment of such amount and the payment in full of all amounts owing to the holders of securities ranking senior to Discovery’s common stock, holders of Series A-1 and Series C-1 convertible preferred stock will share equally on an as converted to common stock basis with the holders of common stock with respect to any assets remaining for distribution to such holders. Preferred Stock Conversion and Repurchases Prior to the Exchange, the Company had an agreement with Advance/Newhouse to repurchase, on a quarterly basis, a number of shares of Series C convertible preferred stock convertible into Series C common stock based on the number of shares of Series C common stock purchased under the Company’s stock repurchase program during the then most recently completed fiscal quarter. The price paid per share is calculated as 99% of the average price paid for the Series C common shares repurchased by the Company during the applicable fiscal quarter multiplied by the Series C conversion rate. The Advance/Newhouse repurchases are made outside of the Company’s publicly announced common stock repurchase program. The repurchase transactions are recorded as a decrease in par value of preferred stock and retained earnings upon settlement as there is no remaining additional paid-in capital ("APIC") for this class of stock and the shares are retired upon repurchase. The Advance/Newhouse repurchase agreement was amended on August 7, 2017 to conform the terms of the previous agreement, as detailed above, to the conversion ratio of the newly issued Series C-1 convertible preferred stock. The table below presents a summary of Series C and Series C-1 convertible preferred stock repurchases made under the repurchase agreement (in millions). Three Months Ended March 31, 2018 2017 Series C Convertible Preferred Stock: Shares repurchased — 1.2 Purchase price $ — $ 60 Series C-1 Convertible Preferred Stock: Shares repurchased — — Purchase price $ — $ — There are no planned repurchases of Series C-1 convertible preferred stock for the second quarter of 2018, and there were no repurchases of Series C common stock during the three months ended March 31, 2018 . Stock Repurchases As of March 31, 2018 , total shares repurchased, on a split-adjusted and as-converted basis, under these programs were 33% of the Company's outstanding shares on a fully-diluted basis since the repurchase programs were authorized. Common Stock Repurchase Contract On March 15, 2017 , the Company settled a December 15, 2016 common stock repurchase contract through the receipt of $58 million of cash. The Company had prepaid $57 million for the common stock repurchase contract in 2016 with the option to settle the contract in cash or Series C common stock in March 2017. The Company elected to receive a cash settlement inclusive of a $1 million premium, which is reflected as an adjustment to APIC. Other Comprehensive Income (Loss) The table below presents the tax effects related to each component of other comprehensive income (loss) and reclassifications made in the consolidated statements of operations (in millions). Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Pretax Tax Net-of-tax Pretax Tax Net-of-tax Currency translation adjustments: Unrealized gains (losses) Foreign currency $ 71 $ 7 $ 78 $ 71 $ 1 $ 72 Net investment hedges (75 ) — (75 ) (4 ) — (4 ) Total currency translation adjustments (4 ) 7 3 67 1 68 AFS adjustments: (a) Unrealized losses — — — (1 ) — (1 ) Total equity investment adjustments — — — (1 ) — (1 ) Derivative adjustments: Unrealized (losses) gains (10 ) 3 (7 ) (13 ) 5 (8 ) Reclassifications: Distribution revenue — — — 3 (1 ) 2 Advertising revenue (1 ) — (1 ) — — — Costs of revenues 4 (1 ) 3 (4 ) 1 (3 ) Interest expense — — — 1 — 1 Total derivative adjustments (7 ) 2 (5 ) (13 ) 5 (8 ) Other comprehensive (loss) income $ (11 ) $ 9 $ (2 ) $ 53 $ 6 $ 59 (a) Effective January 1, 2018 , upon adoption of ASU 2016-01, unrealized gains and losses on equity investments with readily determinable fair values are recorded in other expense, net. The Company recorded a transition adjustment to reclassify prior period amounts in other comprehensive income to retained earnings. (See Note 1 and Note 3.) Accumulated Other Comprehensive Loss The table below presents the changes in the components of accumulated other comprehensive loss , net of taxes (in millions). Three Months Ended March 31, 2018 Currency Translation AFS (a) Derivatives Accumulated Other Comprehensive Loss Beginning balance $ (615 ) $ 26 $ 4 $ (585 ) Other comprehensive income (loss) before reclassifications 3 — (7 ) (4 ) Reclassifications from accumulated other comprehensive loss to net income — — 2 2 Other comprehensive income (loss) 3 — (5 ) (2 ) Reclassifications to retained earnings resulting from the adoption of ASU 2016-01 — (26 ) — (26 ) Ending balance $ (612 ) $ — $ (1 ) $ (613 ) Three Months Ended March 31, 2017 Currency Translation AFS (a) Derivatives Accumulated Other Comprehensive Loss Beginning balance $ (797 ) $ 11 $ 24 $ (762 ) Other comprehensive income (loss) 68 (1 ) (8 ) 59 Other comprehensive income attributable to redeemable noncontrolling interests (1 ) — — (1 ) Ending balance $ (730 ) $ 10 $ 16 $ (704 ) (a) Effective January 1, 2018 , unrealized gains and losses on equity investments with readily determinable fair values are recorded in other expense, net. (See Note 1 and Note 3.)

Noncontrolling Interest

Noncontrolling Interest	3 Months Ended
	Mar. 31, 2018
Noncontrolling Interest [Abstract]
Noncontrolling Interest	REDEEMABLE NONCONTROLLING INTERESTS The table below presents the reconciliation of changes in redeemable noncontrolling interests (in millions). Three Months Ended March 31, 2018 2017 Beginning balance $ 413 $ 243 Cash distributions to redeemable noncontrolling interests (2 ) (3 ) Comprehensive income adjustments: Net income attributable to redeemable noncontrolling interests 6 6 Other comprehensive income attributable to redeemable noncontrolling interests — 1 Currency translation on redemption values 2 1 Retained earnings adjustments: Adjustments of redemption values to the floor — 1 Ending balance $ 419 $ 249 Redeemable noncontrolling interests consist of the arrangements described below: In connection with its non-controlling interest in OWN, Harpo has the right to require the Company to purchase its remaining non-controlling interest during 90-day windows beginning on July 1, 2018 and every two and a half years thereafter through January 1, 2026. As OWN’s put right is outside the control of the Company, OWN’s noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded $56 million for the redeemable noncontrolling interest in equity associated with the value of OWN. (See Note 2.) In connection with the joint venture created between Discovery and GoldenTree on September 25, 2017 , GoldenTree acquired a put right exercisable during 30-day windows beginning in March 2021, September 2022 and March 2024 that requires Discovery to either purchase all of GoldenTree's 32.5% interest in the joint venture at fair value or participate in an initial public offering for the joint venture. As the put right is outside of the Company's control, GoldenTree's 32.5% noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded a redeemable noncontrolling interest of $82 million and an adjustment to redemption value of $38 million for VTEN's put right. (See Note 2.) In connection with its non-controlling interest in Discovery Family, Hasbro Inc. ("Hasbro") has the right to put the entirety of its remaining 40% non-controlling interest to the Company for one year after December 31, 2021 , or in the event a Discovery performance obligation related to Discovery Family is not met. Embedded in the redeemable noncontrolling interest is also a Discovery call right that is exercisable for one year after December 31, 2021 . Upon the exercise of the put or call options, the price to be paid for the redeemable noncontrolling interest is generally a function of the then-current fair market value of the redeemable noncontrolling interest, to which certain discounts and floor values may apply in specified situations depending upon the party exercising the put or call and the basis for the exercise of the put or call. As Hasbro's put right is outside the control of the Company, Hasbro's 40% noncontrolling interest is presented as redeemable noncontrolling interest outside of permanent equity on the Company's consolidated balance sheet. As of March 31, 2018, the Company recorded $215 million for the redeemable noncontrolling interest in equity of Discovery Family. In connection with its non-controlling interest in Discovery Japan, Jupiter Telecommunications Co., Ltd ("J:COM") has the right to put all, but not less than all, of its 20% noncontrolling interest to Discovery at any time for cash. As amended, through January 10, 2018, the redemption value is the January 10, 2013 , fair value denominated in Japanese yen; thereafter, as chosen by J:COM, the redemption value is the then-current fair value or the January 10, 2013 , fair value denominated in Japanese yen. As of March 31, 2018, the Company recorded $28 million for the redeemable noncontrolling interest in equity of Discovery Japan. Redeemable noncontrolling interests reflected as of the balance sheet date are the greater of the noncontrolling interest balances adjusted for comprehensive income items and distributions or the redemption values remeasured at the period end foreign exchange rates (i.e., the "floor"). Adjustments to the carrying amount of redeemable noncontrolling interests to redemption value as a result of changes in exchange rates are reflected in currency translation adjustments, a component of other comprehensive income (loss) ; however, such currency translation adjustments to redemption value are allocated to Discovery stockholders only. Redeemable noncontrolling interest adjustments of redemption value to the floor are reflected in retained earnings. NONCONTROLLING INTEREST In conjunction with the acquisition of Scripps Networks, the Company acquired a controlling interest in the TV Food Network Partnership ("the Partnership"), which is jointly owned with Tribune Media Company (the "Tribune Company"). Food Network and Cooking Channel are operated and organized under the terms of the Partnership. The Company holds 80% of the voting interest and 68.7% of the economic interest in the Partnership. Under the terms of the Partnership, the Partnership has a dissolution date of December 31, 2020. If the term of the Partnership is not extended prior to that date, the Partnership agreement permits the Company, as holder of 80% of the applicable votes, to reconstitute the Partnership and continue its business. If for some reason the Partnership is not continued, it will be required to limit its activities to winding up, settling debts, liquidating assets and distributing proceeds to the partners in proportion to their partnership interests. Ownership interests attributable to the Tribune Company are presented as noncontrolling interests on the Company's consolidated financial statements. Under the terms of the Partnership, Tribune Company cannot force a redemption outside of the Company's control. As such, the noncontrolling interests are reflected as a component of permanent equity in the Company's consolidated financial statements.

Revenues

Revenues	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenues	REVENUES The Company generates revenues principally from: (i) distribution revenues for fees charged to distributors of its network content, which include cable, direct-to-home ("DTH") satellite, telecommunications and digital service providers and bundled long-term content arrangements, (ii) advertising revenue for advertising sold on its television networks, and websites and (iii) other revenue related to several items including: (a) production studios content development and services, (b) affiliate and advertising sales representation services and (c) the licensing of the Company's brands for consumer products. Revenue is recognized upon transfer of control of promised services or goods to customers in an amount that reflects the consideration we expect to receive in exchange for those services or goods. Revenues do not include taxes collected from customers on behalf of taxing authorities such as sales tax and value-added tax. However, certain revenues include taxes that customers pay to taxing authorities on the Company’s behalf, such as foreign withholding tax. Revenue recognition for each source of revenue is also based on the following policies. Distribution Cable operators, DTH satellite operators and telecommunications service providers typically pay a per-subscriber fee for the right to distribute the Company’s programming under the terms of distribution contracts. The majority of the Company’s distribution fees are collected monthly throughout the year and distribution revenue is recognized over the term of the contracts based on contracted programming rates and reported subscriber levels. The amount of distribution fees due to the Company is reported by distributors based on actual subscriber levels. Such information is generally not received until after the close of the reporting period. In these cases, the Company estimates the number of subscribers receiving the Company’s programming. Historical adjustments to recorded estimates have not been material. Distribution revenue from fixed-fee contracts is recognized over the contract term based on the continuous delivery of the content to the affiliate. Any monetary incentives provided to distributors are recognized as a reduction of revenue over the service term. Revenues associated with digital distribution arrangements are recognized when the Company transfers control of the content and the rights to distribute the content to the customer. Delivery of linear feeds and digital direct-to-consumer products, such as video on demand (“VOD”) are considered distinct performance obligations. The Company recognizes revenue for contracts that include linear feeds and VOD as royalties are earned, as these performance obligations are delivered simultaneously. The VOD offerings generally match the programs that are airing on the linear network. Advertising Advertising revenues are principally generated from the sale of bundled commercial time on linear and digital platforms. A substantial portion of the advertising contracts in the U.S. and certain international markets guarantee the advertiser a minimum audience level that either the program in which their advertisements are aired or the advertisement will reach. Revenues are recognized based on the audience level delivered multiplied by the average price per impression. The Company provides the advertiser with advertising until the guaranteed audience level is delivered. Audience guarantees are initially developed internally based on planned programming, historical audience levels, the success of pilot programs, and market trends. Invoiced advertising revenue receivables may exceed the value of the audience delivery, resulting in deferred revenue balances. Revenues are deferred until the guaranteed audience level is delivered or the rights associated with the guarantee lapse. Actual audience and delivery information is published by independent ratings services. In certain instances, the independent ratings information is not received until after the close of the reporting period. In these cases, reported advertising revenue and related deferred revenue are based upon the Company’s estimates of the audience level delivered. Historical adjustments to recorded estimates have not been material. For contracts without an audience guarantee, advertising revenues are recognized as each spot airs. Advertising revenues from digital platforms are recognized as impressions are delivered or the services are performed. The airing of a campaign of advertising spots with a guaranteed audience level is considered a single, distinct performance obligation. The airing of individual spots without a guaranteed audience level are each distinct, individual performance obligations. The Company allocates the consideration to each spot based on their standalone selling prices. Other Revenue for curriculum-based services is recognized ratably over the contract term as service is provided. Royalties from brand licensing arrangements are earned as products are sold by the licensee. License fees from the sublicensing of sports rights are recognized when the rights become available for airing. Revenue from the production studios segment is recognized when the content is delivered and available for airing by the customer. Multiple Performance Obligations Contracts with customers may include multiple distinct performance obligations. For example, distribution contracts may include VOD and digital direct-to-consumer products in addition to the linear feed delivery. Advertising contracts may include sponsorship, production, or product integration in addition to the airing of spots and the satisfaction of an audience guarantee. For such arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price, which is determined based on the cost plus an expected margin. In the case of VOD and linear feed, performance obligations satisfaction occurs at the same time. Therefore, any transaction price allocated to the VOD performance obligation would be recognized using the same pattern of recognition as the linear feed. Deferred Revenue Deferred revenue consists of cash received for television advertising for which the guaranteed viewership has not been provided, product licensing arrangements in which fee collections are in excess of the license value provided, advanced fees received related to the sublicensing of Olympic rights and advanced billings to subscribers for access to the Company’s curriculum-based streaming services. The amounts classified as current are expected to be earned within the next year. Payment terms vary by the type and location of the customer and the products or services offered. The term between invoicing and when payment is due is not significant. For certain products or services and customer types, we require payment before the products or services are delivered to the customer. Revenue Recognition The following table presents the Company’s revenues disaggregated by revenue source (in millions). Three Months Ended March 31, 2018 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 514 $ 537 $ — $ — Advertising 627 385 — — Other 33 176 35 — Total revenues $ 1,174 $ 1,098 $ 35 $ — Three Months Ended March 31, 2017 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 408 $ 447 $ — $ — Advertising 405 282 — — Other 16 18 37 — Total revenues $ 829 $ 747 $ 37 $ — Transaction Price Allocated to Remaining Performance Obligations Most of the Company's distribution contracts are licenses of functional intellectual property where revenue is derived from royalty-based arrangements, for which the guidance allows for the application of a practical expedient instead of estimating incremental royalty contract revenue. However, there are certain other distribution arrangements that are fixed price or contain minimum guarantees that extend beyond one year. The transaction price allocated to remaining performance obligations within these fixed price or minimum guarantee distribution revenue contracts was $2.1 billion as of March 31, 2018 , and is expected to be recognized over the next 10 years. The Company's content licensing contracts and sports sublicensing deals are licenses of functional intellectual property. Certain of these arrangements extend beyond one year. The transaction price allocated to remaining performance obligations on these long-term contracts was $559 million as of March 31, 2018 , and is expected to be recognized over the next five years. The Company's brand licensing contracts are licenses of symbolic intellectual property. Certain of these arrangements extend beyond one year. The transaction price allocated to remaining performance obligations on these long-term contracts was $114 million as of March 31, 2018 , and is expected to be recognized over the next five years. Contract Balances A receivable is recorded when there is an unconditional right to consideration based on a contract with a customer. A contract liability, deferred revenue, is recorded when cash is received in advance of performing services. The following table presents (in millions) the Company’s opening and closing balances of the receivables and deferred revenues, as well as activity since the beginning of the period. December 31, 2017 Additions Reductions Foreign Currency March 31, 2018 Accounts receivable $ 1,838 2,981 (2,163 ) (2 ) $ 2,654 Deferred revenues $ 363 357 (303 ) (6 ) $ 411 December 31, 2016 Additions Reductions Foreign Currency March 31, 2017 Accounts receivable $ 1,495 1,613 (1,563 ) 15 $ 1,560 Deferred revenues $ 285 191 (218 ) 30 $ 288 Practical Expedients and Exemptions With the exception of commissions related to certain education products, sales commissions are generally expensed as incurred because contracts for which the sales commission are generated are one year or less or are not material. Sales commissions are recorded as a component of cost of revenues on the consolidated statements of operations. The financing component of content licensing arrangements is not capitalized because the period between delivery of the license and customer payment is one year or less or is not material. The value of unsatisfied performance obligations is not disclosed for: (i) contracts involving variable consideration for which revenues are recognized in accordance with the usage-based royalty exception, and (ii) contracts with an original expected length of one year or less.

Share-based Payments

Share-based Payments	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Payments	SHARE-BASED PAYMENTS The Company has various incentive plans under which stock options, time-based restricted stock units ("RSUs"), performance-based restricted stock units ("PRSUs") and stock appreciation rights ("SARs") have been issued. During the three months ended March 31, 2018 , the vesting and service requirements of share-based awards granted were consistent with the arrangements disclosed in the 2017 Form 10-K. The table below presents the components of share-based compensation expense (in millions). Three Months Ended March 31, 2018 2017 PRSUs $ 2 $ 9 RSUs 7 6 Stock options 5 3 SARs 1 3 Total share-based compensation expense $ 15 $ 21 Tax benefit recognized $ 3 $ 8 Compensation expense for all awards was recorded in selling, general and administrative expense on the consolidated statements of operations. Liability-classified share-based compensation awards include certain PRSUs and SARs. The Company records expense for the fair value of cash-settled and other liability-classified share-based compensation awards ratably over the graded vesting service period based on changes in fair value and the probability that performance targets will be met, if applicable. The table below presents current and non-current portions of liability-classified share-based compensation awards (in millions). March 31, 2018 December 31, 2017 Current portion of liability-classified awards: PRSUs $ 16 $ 12 SARs 2 — Non-current portion of liability-classified awards: PRSUs 9 32 SARs 2 3 Total liability-classified share-based compensation award liability $ 29 $ 47 The table below presents award activity (in millions, except weighted-average grant price) for PRSUs, RSUs and SARs. Three Months Ended March 31, 2018 Awards Weighted-Average Grant Price Awards granted: PRSUs 0.6 $ 24.06 RSUs (a) 6.3 $ 11.58 SARs 3.7 $ 22.37 Awards converted or settled: PRSUs 1.1 $ 40.23 RSUs 1.2 $ 26.75 SARs — $ — (a) RSU awards granted during the three months ended March 31, 2018 include 3.4 million awards granted to Scripps Networks employees following the acquisition of Scripps Networks at a grant price of $1.00 per share. The table below presents stock option activity (in millions, except weighted-average exercise price). Stock Options Weighted-Average Outstanding as of December 31, 2017 12.3 $ 27.46 Granted (a) 4.2 $ 21.11 Exercised (2.5 ) $ 16.21 Forfeited/cancelled (0.2 ) $ 30.97 Outstanding as of March 31, 2018 13.8 (a) Stock options granted during the three months ended March 31, 2018 include 2 million awards granted in connection with the acquisition of Scripps Networks. The table below presents unrecognized compensation cost related to non-vested share-based awards and the weighted-average amortization period over which these expenses will be recognized as of March 31, 2018 (in millions, except years). Unrecognized Compensation Cost Weighted-Average Amortization Period (years) RSUs $ 104 2.31 PRSUs 28 1.74 Stock options 45 2.50 SARs 15 1.82 Total unrecognized compensation cost $ 192

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS The Company has defined contribution and other savings plans for the benefit of its employees that meet eligibility requirements. As a result of the acquisition of Scripps Networks on March 6, 2018 , the Company assumed employee defined benefit plans previously sponsored by Scripps Networks: (i) qualified defined benefit pension plan ("Pension Plan") that covers certain U.S.-based employees and (ii) non-qualified unfunded Supplemental Executive Retirement Plan ("SERP"), which in addition to the Pension Plan provides defined pension benefits to eligible executives. Pension Plan and SERP Expense recognized in relation to the Pension Plan and SERP is based upon actuarial valuations. Inherent in those valuations are key assumptions including discount rates and, where applicable, expected returns on assets and projected future salary rates. Benefits are generally based on the employee’s compensation and years of service. As of December 31, 2009, no additional service benefits have been earned by participants under the Pension Plan. The amount of eligible compensation that is used to calculate a plan participant’s pension benefit includes compensation earned by the employee through December 31, 2019, after which time all plan participants will have a frozen pension benefit. As of March 6, 2018 , the date of the acquisition of Scripps Networks, based upon a preliminary valuation, the funded status of the Pension Plan and SERP was $36 million and $62 million, respectively. The funded status represents a benefit obligation of $96 million less the fair value of the plan assets of $60 million for the Pension Plan, and a benefit obligation of $62 million for the SERP. Plan assets consist of a mix of U.S. and non-U.S. equity securities, fixed income securities and alternative investment funds. The following table presents the components of the net periodic pension cost for the Pension Plan and SERP in millions. Three Months ended March 31, 2018 Pension Plan SERP Interest cost $ 0.3 $ 0.1 Expected return on plan assets, net of expenses (0.4 ) — Net periodic pension cost $ (0.1 ) $ 0.1 Following the acquisition of Scripps Networks, the Company made no contributions and no benefit payments to the Pension Plan or SERP. During the remainder of 2018, the Company anticipates contributing $3 million to fund the Pension Plan and making $35 million in SERP benefit payments. Assumptions used in determining the Pension Plan and SERP expense, following the acquisition of Scripps Networks, were as follows. Three Months ended March 31, 2018 Pension Plan SERP Discount rate 3.70 % 3.41 % Long-term rate of return on plan assets 7.50 % N/A Rate of compensation increases 3.56 % 3.21 % Assumption Description Discount rate Based on a bond portfolio approach that includes securities rated Aa or better with maturities matching our expected benefit payments from the plans. Long-term rate of return on plan assets Based on the weighted-average expected rate of return and capital market forecasts for each asset class employed and also considers our historical compounded return on plan assets for 10 and 15 year periods. Increase in compensation levels Based on actual past experience and the near-term outlook. Mortality RP 2014 mortality tables adjusted and projected using the scale MP-2017 mortality improvement rates.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The following table reconciles the U.S. federal statutory income tax rate to the Company's effective income tax rate. Three Months Ended March 31, 2018 2017 U.S. federal statutory income tax provision $ 4 21 % $ (96 ) 35 % State and local income taxes, net of federal tax benefit 7 44 % (4 ) 2 % Effect of foreign operations (4 ) (21 )% 15 (6 )% Domestic production activity deductions — — % 8 (3 )% Change in uncertain tax positions — (2 )% — — % Renewable energy investments tax credits (See Note 3) — (1 )% 25 (9 )% U.S. legislative changes 19 109 % — — % Other, net (6 ) (32 )% (3 ) 1 % Income tax benefit (expense) $ 20 118 % $ (55 ) 20 % On December 22, 2017, new federal tax reform legislation ("TCJA") was enacted in the United States, resulting in significant changes from previous tax law. The TCJA revised the U.S. corporate income tax most significantly for Discovery by lowering the statutory corporate tax rate from 35% to 21% and reinstating bonus depreciation that will allow for full expensing of qualified property, for property placed in service before 2023, including qualified film such as content produced by the Company. The TCJA also eliminated or significantly amended certain deductions (interest, domestic production activities deduction and executive compensation). The TCJA fundamentally changed taxation of multinational entities by moving from a system of worldwide taxation with deferral to a hybrid territorial system, featuring a participation exemption regime with current taxation of certain foreign income. Included in the international provisions was the enactment of a minimum tax on low-taxed foreign earnings, and new measures to deter base erosion and promote U.S. production. Notwithstanding the U.S. taxation of these amounts, we intend to continue to invest most or all of these earnings, as well as our capital in these subsidiaries, indefinitely outside of the U.S. Based on our preliminary assessment of the TCJA impact, we recognized a one-time, provisional net tax benefit of $44 million in the fourth quarter of 2017 related to: the deemed repatriation tax on post-1986 accumulated earnings and profits, the deferred tax rate change effect of the new law, gross foreign tax credit carryforwards and related valuation allowances to offset foreign tax credit carryforwards. Our 2017 US federal income tax return will not be finalized until later in 2018, and while historically this process has resulted in offsetting changes in estimates in current and deferred taxes for items which are timing related, the reduction of the US tax rate will result in adjustments to our income tax provision when recorded. Given the substantial changes to the Internal Revenue Code as a result of the TCJA, our estimated financial impacts are subject to further analysis, interpretation and clarification of the new law, which could result in changes to our estimates in future quarters in 2018. We did not make an adjustment during the first quarter of 2018 to our provisional estimate recognized in 2017. However, adjustments may be required in future periods. The Company and its subsidiaries file income tax returns in the U.S. and various state and foreign jurisdictions. The Internal Revenue Service recently completed audit procedures for its 2008 to 2011 tax years, the results of which should be finalized in the coming year. The Company is currently under audit by the Internal Revenue Service for its 2012 to 2014 consolidated federal income tax returns. It is difficult to predict the final outcome or timing of resolution of any particular tax matter. Accordingly, an estimate of any related impact to the reserve for uncertain tax positions cannot currently be determined. With few exceptions, the Company is no longer subject to audit by any jurisdiction for years prior to 2006. The Company's reserves for uncertain tax positions as of March 31, 2018 and December 31, 2017 totaled $379 million and $189 million , respectively. The uncertain tax positions balance as of March 31, 2018 includes $188 million carried over from Scripps Networks upon the acquisition. It is reasonably possible that the total amount of unrecognized tax benefits related to certain of the Company's uncertain tax positions could decrease by as much as $69 million within the next twelve months as a result of ongoing audits, lapses of statutes of limitations or regulatory developments. As of March 31, 2018 and December 31, 2017 , the Company had accrued approximately $53 million and $21 million , respectively, of total interest and penalties payable related to unrecognized tax benefits. The interest and penalties payable balance as of March 31, 2018 includes $32 million carried over from Scripps Networks' financial information upon the acquisition. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE In calculating earnings per share, the Company follows the two-class method, which distinguishes between classes of securities based on the proportionate participation rights of each security type in the Company's undistributed income. The Company's Series A, B and C common stock and the Series C-1 convertible preferred stock are treated as one class for purposes of applying the two-class method, because they have substantially equal rights and share equally on an as-converted basis with respect to income available to Discovery, Inc. Pursuant to the Exchange Agreement with Advance/Newhouse, Discovery issued newly designated shares of Series A-1 and Series C-1 preferred stock in exchange for all outstanding shares of Discovery's Series A and Series C convertible participating preferred stock. (See Note 9.) The Exchange is treated as a reverse stock split and the Company has recast historical basic and diluted earnings per share available to Series C-1 preferred stockholders (previously Series C preferred stockholders). Prior to the Exchange, Series C convertible preferred stock was convertible into Series C common stock at a conversion rate of 2.0 shares of Series C common stock for each shares of Series C convertible preferred stock. Following the exchange, the Series C-1 preferred stock may be converted into Series C common stock at a conversion rate of 19.3648 shares of Series C common stock for each share of Series C-1 preferred stock. As such, the Company has retrospectively restated basic and diluted earnings per share information for Discovery's Series C-1 preferred stock for the three months ended March 31, 2017 . The Exchange did not impact historical basic and diluted earnings per share attributable to the Company's Series A, B and C common stockholders. The table below sets forth the computation for (loss) income allocated to Discovery, Inc. stockholders (in millions). Three Months Ended March 31, 2018 2017 Numerator: Net income $ 3 $ 221 Less: Allocation of undistributed loss (income) to Series A-1 convertible preferred stock 1 (26 ) Net income attributable to noncontrolling interests (5 ) — Net income attributable to redeemable noncontrolling interests (6 ) (6 ) Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share $ (7 ) $ 189 Allocation of net (loss) income to Discovery, Inc. Series A, B and C common stockholders and Series C-1 convertible preferred stockholders for basic net (loss) income per share: Series A, B and C common stockholders (6 ) 143 Series C-1 convertible preferred stockholders (1 ) 46 Total (7 ) 189 Add: Allocation of undistributed (loss) income to Series A-1 convertible preferred stockholders (1 ) 26 Net (loss) income allocated to Discovery, Inc. Series A, B and C common stockholders for diluted net income per share $ (8 ) $ 215 Net (loss) income allocated to Discovery, Inc. Series C-1 convertible preferred stockholders for diluted net (loss) income per share is included in net (loss) income allocated to Discovery, Inc. Series A, B and C common stockholders for diluted net (loss) income per share. For the three months ended March 31, 2018 , net loss allocated to Discovery, Inc. Series C-1 convertible preferred stockholders used to calculate diluted net loss per share was $1 million . For the three months ended March 31, 2017 , net income allocated to Discovery, Inc. Series C-1 convertible preferred stockholders used to calculate diluted net income per share was $45 million . The table below sets forth the weighted average number of shares outstanding utilized in determining the denominator for basic and diluted (loss) earnings per share (in millions). Three Months Ended March 31, 2018 2017 Denominator — weighted average: Series A, B and C common shares outstanding — basic 422 389 Impact of assumed preferred stock conversion 187 195 Dilutive effect of share-based awards — 4 Series A, B and C common shares outstanding — diluted 609 588 Series C-1 convertible preferred stock outstanding — basic and diluted 6 6 The weighted average number of diluted shares outstanding adjusts the weighted average number of shares of Series A, B and C common stock outstanding for the potential dilution that would occur if common stock equivalents, including convertible preferred stock and share-based awards, were converted into common stock or exercised, calculated using the treasury stock method. Series A, B and C diluted common stock includes the impact of the conversion of Series A-1 preferred stock, the impact of the conversion of Series C-1 preferred stock, and the impact of share-based compensation to the extent it is not anti-dilutive. For three months ended March 31, 2018 , the weighted average number of shares outstanding for the computation of diluted loss per share does not include 2 million of share-based awards, as the effects of these potentially outstanding shares would have been anti-dilutive. Prior to the Exchange, Series C convertible preferred stock was convertible into Series C common stock at a conversion rate of 2.0 shares of Series C common stock for each share of Series C convertible preferred stock. Following the exchange, the Series C-1 preferred stock may be converted into Series C common stock at a conversion rate of 19.3648 shares of Series C common stock for each share of Series C-1 preferred stock. The table below sets forth the Company's calculated (loss) earnings per share. Three Months Ended March 31, 2018 2017 Basic net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.11 Diluted net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.06 (Loss) earnings per share amounts may not recalculate due to rounding. The computation of the diluted (loss) earnings per share of Series A, B and C common stockholders assumes the conversion of Series A-1 and C-1 convertible preferred stock, while the diluted (loss) earnings per share amounts of Series C-1 convertible preferred stock does not assume conversion of those shares. The table below presents the details of the anticipated stock repurchases and share-based awards that were excluded from the calculation of diluted (loss) earnings per share (in millions). Three Months Ended March 31, 2018 2017 Anti-dilutive share based awards 16 9 PRSUs whose performance targets have not been achieved 2 1

Supplemental Disclosures

Supplemental Disclosures	3 Months Ended
	Mar. 31, 2018
Disclosure Text Block Supplement [Abstract]
Supplemental Disclosures	SUPPLEMENTAL DISCLOSURES The following tables present supplemental information related to the consolidated financial statements (in millions). Accrued Liabilities March 31, 2018 December 31, 2017 Accrued payroll and related benefits $ 624 $ 535 Content rights payable 370 219 Accrued interest 140 148 Accrued income taxes 39 45 Current portion of share-based compensation liabilities 18 12 Other accrued liabilities 539 350 Total accrued liabilities $ 1,730 $ 1,309 Other Expense, net Three Months Ended March 31, 2018 2017 Foreign currency losses, net $ (4 ) $ (9 ) Gain (loss) on derivative instruments, net 5 (3 ) Change in the value of common stock investments with readily determinable fair value (a) (38 ) — Interest income (b) 15 — Other expense, net — (1 ) Total other expense, net $ (22 ) $ (13 ) (a) As of January 1, 2018 , upon adoption of ASU 2016-01, equity investments with readily determinable fair value for which the Company has the intent to retain the investment are measured at fair value, with unrealized gains and losses recorded in other expense, net. (See Notes 1 and 3.) (b) Interest income for the three months ended March 31, 2018 is comprised of interest on proceeds from the issuance of senior notes used to fund the acquisition of Scripps Networks. As of March 31, 2018 , the Company had liquidated and utilized the proceeds in the acquisition of Scripps Networks. Share-Based Plan Payments, net Share-based plan payments, net in the statement of cash flows consisted of the following (in millions). Three Months Ended March 31, 2018 2017 Tax settlements associated with share-based plans $ (16 ) $ (30 ) Proceeds from issuance of common stock in connection with share-based plans 39 22 Total share-based plan payments, net $ 23 $ (8 ) Supplemental Cash Flow Information Three Months Ended March 31, 2018 2017 Cash paid for taxes, net $ 44 $ 43 Cash paid for interest, net 199 66 Non-cash investing and financing activities: Equity issued for the acquisition of Scripps Networks 3,218 — Accrued purchases of property and equipment 13 21 Assets acquired under capital lease arrangements 24 29

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS In the normal course of business, the Company enters into transactions with related parties. Related parties include entities that share common directorship, such as Liberty Global plc (“Liberty Global”), Liberty Broadband Corporation ("Liberty Broadband") and their subsidiaries and equity method investees (together the “Liberty Group”). Discovery’s Board of Directors includes Mr. Malone, who is Chairman of the Board of Liberty Global and beneficially owns approximately 27% of the aggregate voting power with respect to the election of directors of Liberty Global. Mr. Malone is also Chairman of the Board of Liberty Broadband and beneficially owns approximately 46% of the aggregate voting power with respect to the election of directors of Liberty Broadband. The majority of the revenue earned from the Liberty Group relates to multi-year network distribution arrangements. Related party transactions also include revenues and expenses for content and services provided to or acquired from equity method investees, such as All3Media, UKTV, nC+ and a Russian cable television business, or minority partners of consolidated subsidiaries, such as Hasbro and the Tribune Company. The table below presents a summary of the transactions with related parties, including OWN prior to the November 30, 2017 acquisition (in millions). Three Months Ended March 31, 2018 2017 Revenues and service charges: Liberty Group $ 145 $ 126 Equity method investees 38 34 Other 10 13 Total revenues and service charges $ 193 $ 173 Interest income $ — $ 4 Expenses $ (55 ) $ (30 ) The table below presents receivables due from related parties (in millions). March 31, 2018 December 31, 2017 Receivables $ 131 $ 105 Note receivable (a) $ 103 $ — (a) Amount relates to a note receivable with UKTV, an equity method investee acquired in conjunction with the acquisition of Scripps Networks. (See Note 3.)

Commitments, Contingencies, and

Commitments, Contingencies, and Guarantees	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Guarantees	COMMITMENTS, CONTINGENCIES, AND GUARANTEES Commitments The Company’s contractual commitments increased significantly following the acquisition of Scripps Networks. Below are the Company's updated combined contractual commitments as of March 31, 2018 , including related payments due by period (in millions). Leases Year Ending December 31, Operating Capital Content Other Total 2018 $ 69 $ 42 $ 1,187 $ 361 $ 1,659 2019 78 40 641 348 1,107 2020 60 37 764 211 1,072 2021 48 33 342 82 505 2022 17 26 350 39 432 Thereafter 37 104 771 93 1,005 Total minimum payments 309 282 4,055 1,134 5,780 Amounts representing interest — (38 ) — — (38 ) Total $ 309 $ 244 $ 4,055 $ 1,134 $ 5,742 The Company enters into multi-year lease arrangements for transponders, office space, studio facilities and other equipment. Leases are not cancelable prior to their expiration. On January 9, 2018 , the Company issued a press release announcing a new real estate strategy with plans to relocate the Company's global headquarters from Silver Spring, Maryland to New York City in 2019. As of March 31, 2018 , we did not meet the held for sale classification criteria, as defined in GAAP, as it is uncertain that the sale of the Silver Spring property will be completed within the next twelve months. Content purchase commitments are associated with third-party producers and sports associations for content that airs on the television networks. Production contracts generally require the purchase of a specified number of episodes with payments over the term of the license. Production contracts include both programs that have been delivered and are available for airing and programs that have not yet been produced or sporting events that have not yet taken place. If the content is ultimately never produced, the Company's commitments expire without obligation. The commitments disclosed above exclude content liabilities recognized on the consolidated balance sheet. Other purchase obligations include agreements with certain vendors and suppliers for the purchase of goods and services whereby the underlying agreements are enforceable, legally binding and specify all significant terms. Significant purchase obligations include transmission services, television rating services, marketing research, employment contracts, equipment purchases and information technology services. Some of these contracts do not require the purchase of fixed or minimum quantities and generally may be terminated with a 30-day to 60-day advance notice without penalty, and are not included in the table above past the 30-day to 60-day advance notice period. Amounts related to employment contracts include base compensation, but do not include compensation contingent on future events. Although the Company had funding commitments to equity method investees as of March 31, 2018 , the Company may also provide uncommitted additional funding to its equity method investments in the future. (See Note 3.) Contingencies Put Rights The Company has granted put rights to certain consolidated subsidiaries. Harpo, Golden Tree, Hasbro and J:COM have the right to require the Company to purchase their remaining noncontrolling interests in OWN, VTEN, Discovery Family and Discovery Japan, respectively. The Company recorded the carrying value of the noncontrolling interest in the equity associated with the put rights for OWN, VTEN, Discovery Family and Discovery Japan as a component of redeemable noncontrolling interest in the amounts of $56 million , $120 million , $215 million and $28 million , respectively. (See Note 8.) Legal Matters The Company is party to various lawsuits and claims in the ordinary course of business, including claims related to employees, vendors, other business partners or patent issues. However, a determination as to the amount of the accrual required for such contingencies is highly subjective and requires judgment about future events. Although the outcome of these matters cannot be predicted with certainty and the impact of the final resolution of these matters on the Company's results of operations in a particular subsequent reporting period is not known, management does not believe that the resolution of these matters will have a material adverse effect on the Company's consolidated financial position, future results of operations or cash flows. Guarantees There were no guarantees recorded as of March 31, 2018 and December 31, 2017 . The Company may provide or receive indemnities intended to allocate business transaction risks. Similarly, the Company may remain contingently liable for certain obligations of a divested business in the event that a third party does not fulfill its obligations under an indemnification obligation. The Company records a liability for its indemnification obligations and other contingent liabilities when probable and estimable. There were no material amounts for indemnifications or other contingencies recorded as of March 31, 2018 and December 31, 2017 .

Reportable Segments

Reportable Segments	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Reportable Segments	REPORTABLE SEGMENTS The Company’s operating segments are determined based on (i) financial information reviewed by its chief operating decision maker ("CODM"), the Chief Executive Officer ("CEO"), (ii) internal management and related reporting structure and (iii) the basis upon which the CEO makes resource allocation decisions. The Company's operating segments did not change as a result of the acquisition of Scripps Networks. The accounting policies of the reportable segments are the same as the Company’s, except that certain inter-segment transactions that are eliminated for consolidation are not eliminated at the segment level. Inter-segment transactions primarily include advertising and content purchases. The Company evaluates the operating performance of its segments based on financial measures such as revenues and adjusted operating income before depreciation and amortization (“Adjusted OIBDA”). Adjusted OIBDA is defined as operating income excluding: (i) mark-to-market share-based compensation, (ii) depreciation and amortization, (iii) restructuring and other charges, (iv) certain impairment charges, (v) gains and losses on business and asset dispositions, (vi) certain inter-segment eliminations related to production studios, and (vii) third-party transaction costs directly related to the acquisition and planned integration of Scripps Networks. The Company uses this measure to assess the operating results and performance of its segments, perform analytical comparisons, identify strategies to improve performance and allocate resources to each segment. The Company believes Adjusted OIBDA is relevant to investors because it allows them to analyze the operating performance of each segment using the same metric management uses. The Company excludes mark-to-market share-based compensation, restructuring and other charges, certain impairment charges, gains and losses on business and asset dispositions and Scripps Networks transaction and integration costs from the calculation of Adjusted OIBDA due to their impact on comparability between periods. The Company also excludes depreciation of fixed assets and amortization of intangible assets, as these amounts do not represent cash payments in the current reporting period. Certain corporate expenses are excluded from segment results to enable executive management to evaluate segment performance based upon the decisions of segment executives. Total Adjusted OIBDA should be considered in addition to, but not a substitute for, operating income, net income and other measures of financial performance reported in accordance with GAAP. The tables below present summarized financial information for each of the Company’s reportable segments, other operating segments and corporate and inter-segment eliminations (in millions). Revenues Three Months Ended March 31, 2018 2017 U.S. Networks $ 1,174 $ 829 International Networks 1,098 747 Education and Other 35 37 Total revenues $ 2,307 $ 1,613 Adjusted OIBDA Three Months Ended March 31, 2018 2017 U.S. Networks $ 652 $ 501 International Networks 137 194 Education and Other 3 (6 ) Corporate and inter-segment eliminations (95 ) (86 ) Total Adjusted OIBDA $ 697 $ 603 Reconciliation of Net (Loss) Income available to Discovery, Inc. to total Adjusted OIBDA Three Months Ended March 31, 2018 2017 Net (loss) income available to Discovery, Inc. $ (8 ) $ 215 Net income attributable to noncontrolling interests 5 — Net income attributable to redeemable noncontrolling interests 6 6 Income tax (benefit) expense (20 ) 55 (Loss) income before income taxes (17 ) 276 Other expense, net 22 13 Loss from equity investees, net 22 53 Loss on extinguishment of debt — 54 Interest expense 177 91 Operating income 204 487 Restructuring and other charges 241 24 Depreciation and amortization 193 80 Mark-to-market share-based compensation 3 12 Scripps Networks transaction and integration costs 56 — Total Adjusted OIBDA $ 697 $ 603 Total Assets March 31, 2018 December 31, 2017 U.S. Networks $ 19,756 $ 4,127 International Networks 7,756 5,187 Education and Other 373 394 Corporate and inter-segment eliminations 6,773 12,847 Total assets $ 34,658 $ 22,555 Total assets for corporate and inter-segment eliminations include goodwill that is allocated to the Company’s segments to account for goodwill. The presentation of segment assets in the table above is consistent with the financial reports that are reviewed by the Company’s CEO. Content Rights Expense and Impairment Three Months Ended March 31, 2018 2017 U.S. Networks $ 275 $ 178 International Networks 474 277 Education and Other 1 2 Corporate and inter-segment eliminations 1 1 Total content rights expense and impairment $ 751 $ 458 Content and impairment expenses are generally included in costs of revenues on the consolidated statements of operations. (See Note 5.) Revenues by Geography Three Months Ended March 31, 2018 2017 U.S. $ 1,209 $ 866 Non-U.S. 1,098 747 Total revenues $ 2,307 $ 1,613 Distribution and advertising revenues are attributed to each country based on viewer location. Other revenues are attributed to each country based on customer location. Property and Equipment by Geography March 31, 2018 December 31, 2017 U.S. $ 480 $ 309 U.K. 181 173 Other 267 115 Total property and equipment, net $ 928 $ 597 Property and equipment balances are allocated to each country based on the location of the asset.

Restructuring and Other Charges

Restructuring and Other Charges Restructuring and Other Charges	3 Months Ended
	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Other Charges	RESTRUCTURING AND OTHER CHARGES Restructuring and other charges by reportable segment were as follows (in millions). Three Months Ended March 31, 2018 2017 U.S. Networks $ 34 $ 4 International Networks 100 17 Education and Other — 1 Corporate 107 2 Total restructuring and other charges $ 241 $ 24 Three Months Ended March 31, 2018 2017 Restructuring charges $ 164 $ 24 Other charges 77 — Total restructuring and other charges $ 241 $ 24 Restructuring charges include employee terminations due to cost reduction efforts and management changes. These changes are intended to efficiently integrate the Scripps Networks and establish an efficient cost structure. Restructuring charges also include payments to terminate life of series production contracts. Other charges include content write-offs following a strategic review of content in the Nordics market following the acquisition of Scripps Networks. Changes in restructuring and other liabilities recorded in accrued liabilities by major category were as follows (in millions). Contract Terminations Employee Terminations Total December 31, 2017 $ 1 $ 42 $ 43 Net Accruals (a) 21 136 157 Cash Paid (1 ) (22 ) (23 ) March 31, 2018 $ 21 $ 156 $ 177 (a) Net accruals for the three months ended March 31, 2018 do not include $7 million of Scripps Networks equity awards exchanged for Discovery shares as of March 6, 2018 recorded in APIC.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	3 Months Ended
	Mar. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Statements	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Overview As of March 31, 2018 and December 31, 2017 , most of the outstanding senior notes have been issued by DCL, a wholly owned subsidiary of the Company, pursuant to one or more Registration Statements on Form S-3 filed with the U.S. Securities and Exchange Commission ("SEC"). (See Note 6.) The Company fully and unconditionally guarantees the senior notes on an unsecured basis. Each of the Company, DCL, and/or Discovery Communications Holding LLC (“DCH”) (collectively the “Issuers”) may issue additional debt securities under the Company's current Registration Statement on Form S-3 that are fully and unconditionally guaranteed by the other Issuers. Set forth below are condensed consolidating financial statements presenting the financial position, results of operations and comprehensive income and cash flows of (i) the Company, (ii) DCH, (iii) DCL, (iv) the non-guarantor subsidiaries of DCL on a combined basis, (v) the other non-guarantor subsidiaries of the Company on a combined basis, and (vi) reclassifications and eliminations necessary to arrive at the consolidated financial statement balances for the Company. DCL primarily includes the Discovery Channel and TLC networks in the U.S. The non-guarantor subsidiaries of DCL include substantially all of the Company’s other U.S. and international networks, education businesses, production companies and most of the Company’s websites and digital distribution arrangements. The non-guarantor subsidiaries of DCL are wholly owned subsidiaries of DCL with the exception of certain equity method investments. DCL is a wholly owned subsidiary of DCH. The Company wholly owns DCH through a 33 1/3% direct ownership interest and a 66 2/3% indirect ownership interest through Discovery Holding Company (“DHC”), a wholly owned subsidiary of the Company. DHC and the recently acquired operations of Scripps Networks are included in the other non-guarantor subsidiaries of the Company. On March 6, 2018, the Company assumed $2.5 billion aggregate principal of Scripps Networks outstanding notes. (See Note 2). The Scripps Networks notes were not guaranteed by Discovery and Discovery's senior notes were not guaranteed by Scripps Networks. On April 3, 2018 , the Company completed a transaction in which $2.3 billion aggregate principal amount of Scripps Networks outstanding debt was exchanged for Discovery senior notes (See Note 6). In connection with that transaction, Scripps Networks interactive, Inc., a wholly-owned subsidiary of the Company, fully and unconditionally guaranteed the Discovery senior notes. The condensed consolidated financial statements presented below as of March 31, 2018 reflect the addition of Scripps Networks as a non-guarantor because that guarantee became effective on April 3, 2018 . Basis of Presentation Solely for purposes of presenting the condensed consolidating financial statements, investments in the Company’s subsidiaries have been accounted for by their respective parent company using the equity method. Accordingly, in the following condensed consolidating financial statements the equity method has been applied to (i) the Company’s interests in DCH and the other non-guarantor subsidiaries of the Company, including Scripps Networks, (ii) DCH’s interest in DCL, and (iii) DCL’s interests in the non-guarantor subsidiaries of DCL. Inter-company accounts and transactions have been eliminated to arrive at the consolidated financial statement amounts for the Company. The Company’s accounting bases in all subsidiaries, including goodwill and recognized intangible assets, have been “pushed down” to the applicable subsidiaries. The operations of certain of the Company’s international subsidiaries are excluded from the Company’s consolidated U.S. income tax return. Tax expense related to permanent differences has been allocated to the entity that created the difference. Tax expense related to temporary differences has been allocated to the entity that created the difference, where identifiable. The remaining temporary differences are allocated to each entity included in the Company’s consolidated U.S. income tax return based on each entity’s relative pretax income. Deferred taxes have been allocated based upon the temporary differences between the carrying amounts of the respective assets and liabilities of the applicable entities. The condensed consolidating financial statements should be read in conjunction with the consolidated financial statements of the Company. Condensed Consolidating Balance Sheet March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and ASSETS Current assets: Cash and cash equivalents $ — $ — $ 367 $ 295 $ 150 $ — $ 812 Receivables, net — — 429 1,404 821 — 2,654 Content rights, net — — 3 300 116 — 419 Prepaid expenses and other current assets 77 40 203 136 180 — 636 Inter-company trade receivables, net — — 148 — — (148 ) — Total current assets 77 40 1,150 2,135 1,267 (148 ) 4,521 Investment in and advances to subsidiaries 7,816 (4,119 ) 6,800 — (2,706 ) (7,791 ) — Noncurrent content rights, net — — 673 1,632 1,018 — 3,323 Goodwill, net — — 3,677 3,428 5,997 — 13,102 Intangible assets, net — — 258 1,479 9,088 — 10,825 Equity method investments, including note receivable — — 24 333 874 — 1,231 Other noncurrent assets, including property and equipment, net — 20 394 834 428 (20 ) 1,656 Total assets $ 7,893 $ (4,059 ) $ 12,976 $ 9,841 $ 15,966 $ (7,959 ) $ 34,658 LIABILITIES AND EQUITY Current liabilities: Current portion of debt $ — $ — $ 129 $ 21 $ 3 $ — $ 153 Other current liabilities — — 519 1,239 554 — 2,312 Inter-company trade payables, net — — — 148 — (148 ) — Total current liabilities — — 648 1,408 557 (148 ) 2,465 Noncurrent portion of debt — — 16,126 607 2,481 — 19,214 Other noncurrent liabilities 4 — 321 607 2,053 (19 ) 2,966 Total liabilities 4 — 17,095 2,622 5,091 (167 ) 24,645 Redeemable noncontrolling interests — — — 419 — — 419 Equity attributable to Discovery, Inc. 7,889 (4,059 ) (4,119 ) 6,800 10,875 (9,497 ) 7,889 Noncontrolling interests — — — — — 1,705 1,705 Total equity 7,889 (4,059 ) (4,119 ) 6,800 10,875 (7,792 ) 9,594 Total liabilities and equity $ 7,893 $ (4,059 ) $ 12,976 $ 9,841 $ 15,966 $ (7,959 ) $ 34,658 Condensed Consolidating Balance Sheet December 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and ASSETS Current assets: Cash and cash equivalents $ — $ — $ 6,800 $ 509 $ — $ — $ 7,309 Receivables, net — — 410 1,428 — — 1,838 Content rights, net — — 4 406 — — 410 Prepaid expenses and other current assets 49 32 204 149 — — 434 Inter-company trade receivables, net — — 205 — — (205 ) — Total current assets 49 32 7,623 2,492 — (205 ) 9,991 Investment in and advances to subsidiaries 4,563 4,532 6,951 — 3,056 (19,102 ) — Noncurrent content rights, net — — 672 1,541 — — 2,213 Goodwill, net — — 3,677 3,396 — — 7,073 Intangible assets, net — — 259 1,511 — — 1,770 Equity method investments, including note receivable — — 25 310 — — 335 Other noncurrent assets, including property and equipment, net — 20 364 809 — (20 ) 1,173 Total assets $ 4,612 $ 4,584 $ 19,571 $ 10,059 $ 3,056 $ (19,327 ) $ 22,555 LIABILITIES AND EQUITY Current liabilities: Current portion of debt $ — $ — $ 7 $ 23 $ — $ — $ 30 Other current liabilities — — 572 1,269 — — 1,841 Inter-company trade payables, net — — — 205 — (205 ) — Total current liabilities — — 579 1,497 — (205 ) 1,871 Noncurrent portion of debt — — 14,163 592 — — 14,755 Other noncurrent liabilities 2 — 297 606 21 (20 ) 906 Total liabilities 2 — 15,039 2,695 21 (225 ) 17,532 Redeemable noncontrolling interests — — — 413 — — 413 Total equity 4,610 4,584 4,532 6,951 3,035 (19,102 ) 4,610 Total liabilities and equity $ 4,612 $ 4,584 $ 19,571 $ 10,059 $ 3,056 $ (19,327 ) $ 22,555 Condensed Consolidating Statement of Operations Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Operations Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Operations Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Revenues $ — $ — $ 488 $ 1,549 $ 273 $ (3 ) $ 2,307 Costs of revenues, excluding depreciation and amortization — — 107 866 92 (5 ) 1,060 Selling, general and administrative 26 — 80 436 65 2 609 Depreciation and amortization — — 17 93 83 — 193 Restructuring and other charges 8 — 43 98 92 — 241 Total costs and expenses 34 — 247 1,493 332 (3 ) 2,103 Operating (loss) income (34 ) — 241 56 (59 ) — 204 Equity in earnings of subsidiaries 17 71 9 — 47 (144 ) — Interest expense — — (157 ) (12 ) (8 ) — (177 ) (Loss) income from equity investees, net — — — (31 ) 9 — (22 ) Other (expense) income, net — — (24 ) 4 (2 ) — (22 ) (Loss) income before income taxes (17 ) 71 69 17 (13 ) (144 ) (17 ) Income tax benefit (expense) 8 — 2 (2 ) 12 — 20 Net (loss) income (9 ) 71 71 15 (1 ) (144 ) 3 Net income attributable to noncontrolling interests — — — — — (5 ) (5 ) Net income attributable to redeemable noncontrolling interests — — — — — (6 ) (6 ) Net (loss) income available to Discovery, Inc. $ (9 ) $ 71 $ 71 $ 15 $ (1 ) $ (155 ) $ (8 ) Condensed Consolidating Statement of Operations Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Revenues $ — $ — $ 491 $ 1,125 $ — $ (3 ) $ 1,613 Costs of revenues, excluding depreciation and amortization — — 108 499 — — 607 Selling, general and administrative 4 — 74 340 — (3 ) 415 Depreciation and amortization — — 12 68 — — 80 Restructuring and other charges — — 16 8 — — 24 Total costs and expenses 4 — 210 915 — (3 ) 1,126 Operating (loss) income (4 ) — 281 210 — — 487 Equity in earnings of subsidiaries 218 218 140 — 145 (721 ) — Interest expense — — (86 ) (5 ) — — (91 ) Loss on extinguishment of debt — — (54 ) — — — — (54 ) Income (loss) from equity investees, net — — 1 (54 ) — — (53 ) Other (expense) income, net — — (27 ) 14 — — (13 ) Income before income taxes 214 218 255 165 145 (721 ) 276 Income tax benefit (expense) 1 — (37 ) (19 ) — — (55 ) Net income 215 218 218 146 145 (721 ) 221 Net income attributable to redeemable noncontrolling interests — — — — — (6 ) (6 ) Net income available to Discovery, Inc. $ 215 $ 218 $ 218 $ 146 $ 145 $ (727 ) $ 215 Condensed Consolidating Statement of Comprehensive Income Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Comprehensive Income Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Comprehensive Income (Loss) Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Net (loss) income $ (9 ) $ 71 $ 71 $ 15 $ (1 ) $ (144 ) $ 3 Other comprehensive income (loss) adjustments, net of tax: Currency translation 3 23 23 23 (5 ) (64 ) 3 Derivatives (5 ) (5 ) (5 ) (5 ) (3 ) 18 (5 ) Comprehensive (loss) income (11 ) 89 89 33 (9 ) (190 ) 1 Comprehensive income attributable to noncontrolling interests — — — — — (5 ) (5 ) Comprehensive income attributable to redeemable noncontrolling interests (2 ) (2 ) (2 ) (2 ) (1 ) 3 (6 ) Comprehensive (loss) income attributable to Discovery, Inc. $ (13 ) $ 87 $ 87 $ 31 $ (10 ) $ (192 ) $ (10 ) Condensed Consolidating Statement of Comprehensive Income (Loss) Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Net income $ 215 $ 218 $ 218 $ 146 $ 145 $ (721 ) $ 221 Other comprehensive income (loss) adjustments, net of tax: Currency translation 68 68 68 68 45 (249 ) 68 Available-for-sale securities (1 ) (1 ) (1 ) (1 ) (1 ) 4 (1 ) Derivatives (8 ) (8 ) (8 ) (9 ) (5 ) 30 (8 ) Comprehensive income 274 277 277 204 184 (936 ) 280 Comprehensive income attributable to redeemable noncontrolling interests (1 ) (1 ) (1 ) (1 ) (1 ) (2 ) (7 ) Comprehensive income attributable to Discovery, Inc. $ 273 $ 276 $ 276 $ 203 $ 183 $ (938 ) $ 273 Condensed Consolidating Statement of Cash Flows Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Operating Activities Cash (used in) provided by operating activities $ (54 ) $ (8 ) $ 17 $ 210 $ (5 ) $ — $ 160 Investing Activities Business acquisitions, net of cash acquired (8,714 ) — — — 149 — (8,565 ) (Payments for) proceeds from investments — — — (28 ) 6 — (22 ) Purchases of property and equipment — — (25 ) (23 ) — — (48 ) Payments for derivative instruments, net — — — (42 ) — — (42 ) Other investing activities, net — — — 2 — — 2 Cash (used in) provided by investing activities (8,714 ) — (25 ) (91 ) 155 — (8,675 ) Financing Activities Borrowings under term loan agreements — — 2,000 — — — 2,000 Principal repayments of capital lease obligations — — (2 ) (11 ) — — (13 ) Distributions to redeemable noncontrolling interests — — — (2 ) — — (2 ) Share-based plan proceeds, net 23 — — — — — 23 Borrowing under program financing line of credit — — 22 — — — 22 Other financing activities, net 8,745 8 (8,445 ) (319 ) — — (11 ) Cash provided by (used in) financing activities 8,768 8 (6,425 ) (332 ) — — 2,019 Effect of exchange rate changes on cash and cash equivalents — — — (1 ) — — (1 ) Net change in cash and cash equivalents — — (6,433 ) (214 ) 150 — (6,497 ) Cash and cash equivalents, beginning of period — — 6,800 509 — — 7,309 Cash and cash equivalents, end of period $ — $ — $ 367 $ 295 $ 150 $ — $ 812 Condensed Consolidating Statement of Cash Flows Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Operating Activities Cash provided by (used in) operating activities $ 46 $ (2 ) $ 61 $ 150 $ — $ — $ 255 Investing Activities Payments for (proceeds from) investments — — 1 (189 ) — — (188 ) Purchases of property and equipment — — (20 ) (27 ) — — (47 ) Distributions from equity method investees — — — 5 — — 5 Proceeds from derivative instruments, net — — — 5 — — 5 Inter-company distributions — — 2 — — (2 ) — Other investing activities, net — — — 1 — — 1 Cash used in investing activities — — (17 ) (205 ) — (2 ) (224 ) Financing Activities Commercial paper borrowings, net — — 54 — — — 54 Borrowings under revolving credit facility — — 150 — — — 150 Principal repayments of revolving credit facility — — (125 ) — — — (125 ) Borrowings from debt, net of discount and including premiums — — 659 — — — 659 Principal repayments of debt, including discount payment and premiums to par value — — (650 ) — — — (650 ) Principal repayments of capital lease obligations — — (2 ) (11 ) — — (13 ) Repurchases of stock (200 ) — — — — — (200 ) Cash settlement of common stock repurchase contracts 58 — — — — — 58 Distributions to redeemable noncontrolling interests — — — (3 ) — — (3 ) Share-based plan payments, net (8 ) — — — — — (8 ) Inter-company contributions and other financing activities, net 104 2 (132 ) 18 — 2 (6 ) Cash (used in) provided by financing activities (46 ) 2 (46 ) 4 — 2 (84 ) Effect of exchange rate changes on cash and cash equivalents — — — 20 — — 20 Net change in cash and cash equivalents — — (2 ) (31 ) — — (33 ) Cash and cash equivalents, beginning of period — — 20 280 — — 300 Cash and cash equivalents, end of period $ — $ — $ 18 $ 249 $ — $ — $ 267

Description of Business and B29

Description of Business and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of Discovery and its majority-owned subsidiaries in which a controlling interest is maintained. For each non-wholly owned subsidiary, the Company evaluates its ownership and other interests to determine whether it should consolidate the entity or account for its ownership interest as an investment. As part of its evaluation, the Company makes judgments in determining whether the entity is a variable interest entity ("VIE") and, if so, whether it is the primary beneficiary of the VIE and is thus required to consolidate the entity. (See Note 3.) Inter-company accounts and transactions between consolidated entities have been eliminated in consolidation.
Basis of Presentation	Unaudited Interim Financial Statements These consolidated financial statements are unaudited; however, in the opinion of management, they reflect all adjustments consisting only of normal recurring adjustments necessary to state fairly the financial position, results of operations and cash flows for the periods presented in conformity with U.S. generally accepted accounting principles (“GAAP”) applicable to interim periods. The results of operations for the interim periods presented are not necessarily indicative of results for the full year or future periods. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in Discovery’s Annual Report on Form 10-K for the year ended December 31, 2017 (the “ 2017 Form 10-K”).
Use of Estimates	Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates, judgments and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Management continually re-evaluates its estimates, judgments and assumptions, and management’s evaluation could change. These estimates are sometimes complex, sensitive to changes in assumptions and may require fair value determinations using Level 3 fair value measurements. Actual results may differ materially from those estimates. Estimates and judgments inherent in the preparation of the consolidated financial statements include accounting for asset impairments, revenue recognition, allowances for doubtful accounts, content rights, depreciation and amortization, business combinations, share-based compensation, defined benefit plans, income taxes, other financial instruments, contingencies and the determination of whether the Company is the primary beneficiary of entities in which it holds variable interests.
Preferred Stock Exchange	Preferred Stock Exchange As a result of the July 30, 2017 , Preferred Share Exchange Agreement (the "Exchange Agreement") with Advance/Newhouse Programming Partnership ("Advance/Newhouse"), in which Discovery agreed to issue newly designated shares of Series A-1 and Series C-1 preferred stock in exchange for all outstanding shares of Discovery's Series A and Series C convertible participating preferred stock (see Note 9), historical basic and diluted earnings per share available to Series C-1 preferred stockholders, previously Series C preferred stockholders, has changed. The transactions contemplated by the Exchange Agreement were completed on August 7, 2017. Prior to the Exchange Agreement, Series C convertible preferred stock was convertible into Series C common stock at a conversion rate of 2.0 shares of Series C common stock for each share of Series C preferred stock. Following the exchange, the Series C-1 preferred stock may be converted into Series C common stock at the initial conversion rate of 19.3648 shares of Series C common stock for each share of Series C-1 preferred stock. As such, the Company has retrospectively recast basic and diluted earnings per share information for Series C preferred stock for the three months ended March 31, 2017 in order to conform with per share earnings that would have been available for Series C-1 preferred stock. (See Note 15.) The Exchange Agreement did not impact historical basic and diluted earnings per share attributable to the Company's Series A, B and C common stockholders.
Accounting and Reporting Pronouncements Adopted and Not Yet Adopted	Accounting and Reporting Pronouncements Adopted Recognition and Measurement of Financial Instruments ("ASU 2016-01") On January 1, 2018 , the Company adopted new guidance that enhances the reporting model for financial instruments. The new guidance impacted the financial statements as follows: • Gains and losses on common stock investments with readily determinable fair values are now recorded in other expense, net. Previously, the Company recorded these gains and losses in other comprehensive income ("OCI"). The Company adopted this guidance on a modified retrospective basis and recorded a transition adjustment, to reclassify accumulated other comprehensive income to retained earnings, of $26 million , net of tax as of January 1, 2018 . The new guidance eliminates the available-for-sale ("AFS") classification. (See Note 3 and Note 9.) • Upon adoption of ASU 2016-01, the Lionsgate Collar, as defined in Note 3, no longer receives the hedge accounting designation. There is no change to the manner in which movements in fair value of these instruments will be reflected in the financial statements, as gains and losses will continue to be recorded as a component of other expense, net on the consolidated statements of operations. (See Note 7.) • For equity interests without readily determinable fair values previously accounted for under the cost method, the Company has elected to apply the "measurement alternative" prospectively. Under this election, investments are recorded at cost, less impairment, adjusted for subsequent observable price changes as of the date that an observable transaction took place. The Company will recognize observable price changes as adjustments to fair values of these investments. (See Note 3 and Note 4.) In addition, companies are required to perform a qualitative assessment each reporting period to identify impairment under the single-step model. When a qualitative assessment indicates that an impairment exists, the Company will need to estimate the fair value of the investment and recognize in current earnings an impairment loss equal to the difference between the fair value and the carrying amount of the equity investment. • The Company evaluated the accounting for fair value call rights associated with its equity interests without readily determinable fair values and concluded that there is no change to the accounting for these investments. Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers ("Topic 606") and ASU 340-40, Other Assets and Deferred Costs, which updates numerous requirements in U.S. GAAP, including industry-specific requirements, and provides companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The guidance also addresses the accounting for costs incurred as part of obtaining or fulfilling a contract with a customer. The guidance in this Subtopic requires that costs of obtaining a contract be recognized as an asset and amortized as goods and services are transferred to the customer, as long as the costs are expected to be recovered. On January 1, 2018, the Company adopted ASC Topic 606 Revenue from Contracts with Customers using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts have not been adjusted and continue to be reported in accordance with our historic accounting under Topic 605. Following the modified retrospective approach for the adoption of this accounting guidance, the Company recorded an increase to opening retained earnings of $7 million as of January 1, 2018, due to the cumulative impact of adopting Topic 606. The impact relates to the capitalization of sales commissions for long-term education-based services. Expense amortized for the three months ended March 31, 2018 for capitalized sales commissions was recorded as part of costs of revenues. The impact to revenue and costs of revenues for the three months ended March 31, 2018 as a result of applying Topic 606 was immaterial. (See Note 11.) Income Taxes In October 2016, the FASB issued guidance that simplifies the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The new guidance includes requirements to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs, and therefore eliminates the exception for an intra-entity transfer of an asset other than inventory. The Company adopted the new standard effective January 1, 2018, and there was no material impact on the consolidated financial statements upon adoption. Clarifying the definition of a business On January 1, 2018 , the Company adopted new FASB guidance that amends the definition of a business and provides a threshold which must be considered to determine whether a transaction is an acquisition (or disposal) of an asset or a business. Under the previous accounting guidance, the minimum inputs and processes required for a “set” of assets and activities to meet the definition of a business is not specified. That lack of clarity has led to broad interpretations of the definition of a business. Under the new guidance, when substantially all of the fair value of gross assets acquired is concentrated in a single asset (or group of similar assets), the assets acquired would not represent a business. In addition, in order to be considered a business, an acquisition would have to include at a minimum an input and a substantive process that together significantly contribute to the ability to create an output. This guidance also narrows the definition of outputs by more closely aligning it with how outputs are described in the revenue recognition guidance. Compensation - Retirement Benefits On March 10, 2017 , the FASB issued new accounting guidance related to the presentation of net periodic pension costs and net periodic postretirement benefit costs, which requires employers sponsoring postretirement benefit plans to disaggregate the service cost component from the other components of net benefit cost. The standard also provides explicit guidance on how to present the service cost and other components of net benefit cost in the statement of operations and allows only the service cost component of net benefit cost to be eligible for capitalization. In conjunction with the acquisition of Scripps Networks, the Company evaluated the accounting for the qualified defined benefit pension plan ("Pension Plan") and the non-qualified unfunded Supplemental Executive Retirement Plan ("SERP"). As the Pension Plan was frozen effective December 31, 2009 and the Plan sponsor no longer grants credits to participants for service costs, the updated guidance on service costs is not applicable. The presentation as required by this guidance is reflected within the employee benefit plans footnote disclosures. (See Note 13.) Accounting and Reporting Pronouncements Not Yet Adopted Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued updated guidance which permits entities to reclassify tax effects stranded in accumulated other comprehensive income as a result of the 2017 Tax Cuts and Jobs Act ("TCJA") to retained earnings for each period in which the effect of the change is recorded. The update also requires entities to disclose their accounting policy for releasing income tax effects from accumulated other comprehensive income. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements. Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued significant amendments to hedge accounting which expand the eligibility for hedge accounting to more financial and nonfinancial hedging strategies. The guidance is intended to align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. In addition, the guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The updated guidance is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements. Goodwill Under the current accounting guidance, the quantitative goodwill impairment test is performed using a two-step process. The first step of the process is to compare the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not impaired and the second step of the quantitative impairment test is not necessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the quantitative goodwill impairment test is required to be performed to measure the amount of impairment loss, if any. The second step of the quantitative goodwill impairment test compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. In other words, the estimated fair value of the reporting unit’s identifiable net assets excluding goodwill is compared to the fair value of the reporting unit as if the reporting unit had been acquired in a business combination and the fair value of the reporting unit was the purchase price paid. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. In January 2017, the FASB issued guidance that simplifies the subsequent measurement of goodwill. The new guidance eliminates Step 2 from the goodwill impairment test, and eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. Therefore, an entity will recognize impairment charges for the amount by which the carrying amount exceeds the reporting unit's fair value, and the same impairment assessment applies to all reporting units. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017 . The amendments in this update must be adopted on a prospective basis for the annual or any interim goodwill impairment tests beginning after December 15, 2019 . Leases In February 2016 , the FASB issued guidance on leases that will require lessees to recognize almost all of their leases on the balance sheet by recording a right-of-use asset and liability. The new standard will be effective for reporting periods beginning after December 15, 2018 , and the new accounting guidance may be applied at the beginning of the earliest comparative period presented in the year of adoption or at effective date without applying the provisions of the new guidance to comparative periods presented. The Company is currently evaluating the impact that the pronouncement will have on the consolidated financial statements; however, it is expected that assets and liabilities will increase materially when operating leases are recorded under the new standard. The method of transition will be determined when the Company has completed its evaluation.
Concentrations Risk	Concentrations Risk Customers The Company has long-term contracts with distributors around the world. For the U.S. Networks segment, more than 95% of distribution revenue comes from the Company's largest 10 distributors in the U.S. For the International Networks segment, approximately 40% of distribution revenue comes from the Company's largest 10 distributors outside of the U.S. Agreements in place with the 10 largest cable and satellite operators in the U.S. Networks and International Networks expire at various times from 2018 through 2024 . Although the Company seeks to renew its agreements with its distributors prior to expiration of a contract, a delay in securing a renewal that results in a service disruption, a failure to secure a renewal or a renewal on less favorable terms may have a material adverse effect on the Company’s financial condition and results of operations. Not only could the Company experience a reduction in distribution revenue, but it could also experience a reduction in advertising revenue, as viewership is impacted by affiliate subscriber levels. No individual customer accounted for more than 10% of total consolidated revenues for the three months ended March 31, 2018 or 2017 . As of March 31, 2018 and December 31, 2017 , the Company’s trade receivables did not represent a significant concentration of credit risk as the customers and markets in which the Company operates are varied and dispersed across many geographic areas. Financial Institutions Cash and cash equivalents are maintained with several financial institutions. The Company has deposits held with banks that exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and, therefore, bear minimal credit risk. The Company performs periodic evaluations of the relative credit standing of the financial institutions and attempts to limit exposure with any one institution. Additionally, the Company has cash and cash equivalents held by its foreign subsidiaries. Under the TCJA, the Company is subject to U.S. taxes for the deemed repatriation of certain cash balances held by foreign corporations. The Company intends to continue to permanently reinvest these funds outside of the U.S., and current plans do not demonstrate a need to repatriate them to fund our U.S. operations. Lender Counterparties There is a risk that the counterparties associated with the Company’s revolving credit facility will not be available to fund as obligated under the terms of the facility and that the Company may, at the time of such unavailability to fund, have limited or no access to the commercial paper market. If funding under the revolving credit facility is unavailable, the Company may have to acquire a replacement credit facility from different counterparties at a higher cost or may be unable to find a suitable replacement. Typically, the Company seeks to manage such risks from its revolving credit facility by contracting with experienced large financial institutions and monitoring the credit quality of its lenders. As of March 31, 2018 , the Company did not anticipate nonperformance by any of its counterparties. Counterparty Credit Risk The Company is exposed to the risk that the counterparties to outstanding derivative financial instruments will default on their obligations. The Company manages these credit risks by evaluating and monitoring the creditworthiness of, and concentration of risk with, the respective counterparties. In this regard, credit risk associated with outstanding derivative financial instruments is spread across a relatively broad counterparty base of banks and financial institutions. In connection with the Company's economic hedge of certain investments classified as common stock investments with readily determinable fair value, the Company has pledged shares as collateral to the derivative counterparty. (See Note 3.) The Company also has a limited number of arrangements where collateral is required to be posted in the instance that certain fair value thresholds are exceeded. As of March 31, 2018 , $43 million of collateral has been posted by the Company under these arrangements and classified as other noncurrent assets in the consolidated balance sheets. As of March 31, 2018 , our exposure to counterparty credit risk included derivative assets with an aggregate fair value of $31 million . (See Note 4.)
Fair Value Measurements	Fair value is defined as the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants. Assets and liabilities carried at fair value are classified in the following three categories: Level 1 – Quoted prices for identical instruments in active markets. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Valuations derived from techniques in which one or more significant inputs are unobservable.
Derivatives	The Company uses derivative financial instruments to modify its exposure to market risks from changes in foreign currency exchange rates and interest rates. At the inception of a derivative contract, the Company designates the derivative as one of four types based on the Company's intentions and belief as to its likely effectiveness as a hedge. These four types are: (1) a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability ("cash flow hedge"), (2) a hedge of net investments in foreign operations ("net investment hedge"), (3) a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment ("fair value hedge"), or (4) an instrument with no hedging designation. The Company does not enter into or hold derivative financial instruments for speculative trading purposes.
Derivatives, Hedge Discontinuances, Anticipated Transactions	The ineffective portion of any previous gains and losses recorded in accumulated other comprehensive loss on the consolidated balance sheets are reclassified immediately to other expense, net on the consolidated statements of operations.
Redeemable noncontrolling interest	Redeemable noncontrolling interests reflected as of the balance sheet date are the greater of the noncontrolling interest balances adjusted for comprehensive income items and distributions or the redemption values remeasured at the period end foreign exchange rates (i.e., the "floor"). Adjustments to the carrying amount of redeemable noncontrolling interests to redemption value as a result of changes in exchange rates are reflected in currency translation adjustments, a component of other comprehensive income (loss) ; however, such currency translation adjustments to redemption value are allocated to Discovery stockholders only. Redeemable noncontrolling interest adjustments of redemption value to the floor are reflected in retained earnings.
Revenues	REVENUES The Company generates revenues principally from: (i) distribution revenues for fees charged to distributors of its network content, which include cable, direct-to-home ("DTH") satellite, telecommunications and digital service providers and bundled long-term content arrangements, (ii) advertising revenue for advertising sold on its television networks, and websites and (iii) other revenue related to several items including: (a) production studios content development and services, (b) affiliate and advertising sales representation services and (c) the licensing of the Company's brands for consumer products. Revenue is recognized upon transfer of control of promised services or goods to customers in an amount that reflects the consideration we expect to receive in exchange for those services or goods. Revenues do not include taxes collected from customers on behalf of taxing authorities such as sales tax and value-added tax. However, certain revenues include taxes that customers pay to taxing authorities on the Company’s behalf, such as foreign withholding tax. Revenue recognition for each source of revenue is also based on the following policies. Distribution Cable operators, DTH satellite operators and telecommunications service providers typically pay a per-subscriber fee for the right to distribute the Company’s programming under the terms of distribution contracts. The majority of the Company’s distribution fees are collected monthly throughout the year and distribution revenue is recognized over the term of the contracts based on contracted programming rates and reported subscriber levels. The amount of distribution fees due to the Company is reported by distributors based on actual subscriber levels. Such information is generally not received until after the close of the reporting period. In these cases, the Company estimates the number of subscribers receiving the Company’s programming. Historical adjustments to recorded estimates have not been material. Distribution revenue from fixed-fee contracts is recognized over the contract term based on the continuous delivery of the content to the affiliate. Any monetary incentives provided to distributors are recognized as a reduction of revenue over the service term. Revenues associated with digital distribution arrangements are recognized when the Company transfers control of the content and the rights to distribute the content to the customer. Delivery of linear feeds and digital direct-to-consumer products, such as video on demand (“VOD”) are considered distinct performance obligations. The Company recognizes revenue for contracts that include linear feeds and VOD as royalties are earned, as these performance obligations are delivered simultaneously. The VOD offerings generally match the programs that are airing on the linear network. Advertising Advertising revenues are principally generated from the sale of bundled commercial time on linear and digital platforms. A substantial portion of the advertising contracts in the U.S. and certain international markets guarantee the advertiser a minimum audience level that either the program in which their advertisements are aired or the advertisement will reach. Revenues are recognized based on the audience level delivered multiplied by the average price per impression. The Company provides the advertiser with advertising until the guaranteed audience level is delivered. Audience guarantees are initially developed internally based on planned programming, historical audience levels, the success of pilot programs, and market trends. Invoiced advertising revenue receivables may exceed the value of the audience delivery, resulting in deferred revenue balances. Revenues are deferred until the guaranteed audience level is delivered or the rights associated with the guarantee lapse. Actual audience and delivery information is published by independent ratings services. In certain instances, the independent ratings information is not received until after the close of the reporting period. In these cases, reported advertising revenue and related deferred revenue are based upon the Company’s estimates of the audience level delivered. Historical adjustments to recorded estimates have not been material. For contracts without an audience guarantee, advertising revenues are recognized as each spot airs. Advertising revenues from digital platforms are recognized as impressions are delivered or the services are performed. The airing of a campaign of advertising spots with a guaranteed audience level is considered a single, distinct performance obligation. The airing of individual spots without a guaranteed audience level are each distinct, individual performance obligations. The Company allocates the consideration to each spot based on their standalone selling prices. Other Revenue for curriculum-based services is recognized ratably over the contract term as service is provided. Royalties from brand licensing arrangements are earned as products are sold by the licensee. License fees from the sublicensing of sports rights are recognized when the rights become available for airing. Revenue from the production studios segment is recognized when the content is delivered and available for airing by the customer. Multiple Performance Obligations Contracts with customers may include multiple distinct performance obligations. For example, distribution contracts may include VOD and digital direct-to-consumer products in addition to the linear feed delivery. Advertising contracts may include sponsorship, production, or product integration in addition to the airing of spots and the satisfaction of an audience guarantee. For such arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price, which is determined based on the cost plus an expected margin. In the case of VOD and linear feed, performance obligations satisfaction occurs at the same time. Therefore, any transaction price allocated to the VOD performance obligation would be recognized using the same pattern of recognition as the linear feed. Deferred Revenue Deferred revenue consists of cash received for television advertising for which the guaranteed viewership has not been provided, product licensing arrangements in which fee collections are in excess of the license value provided, advanced fees received related to the sublicensing of Olympic rights and advanced billings to subscribers for access to the Company’s curriculum-based streaming services. The amounts classified as current are expected to be earned within the next year. Payment terms vary by the type and location of the customer and the products or services offered. The term between invoicing and when payment is due is not significant. For certain products or services and customer types, we require payment before the products or services are delivered to the customer. Revenue Recognition The following table presents the Company’s revenues disaggregated by revenue source (in millions). Three Months Ended March 31, 2018 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 514 $ 537 $ — $ — Advertising 627 385 — — Other 33 176 35 — Total revenues $ 1,174 $ 1,098 $ 35 $ — Three Months Ended March 31, 2017 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 408 $ 447 $ — $ — Advertising 405 282 — — Other 16 18 37 — Total revenues $ 829 $ 747 $ 37 $ — Transaction Price Allocated to Remaining Performance Obligations Most of the Company's distribution contracts are licenses of functional intellectual property where revenue is derived from royalty-based arrangements, for which the guidance allows for the application of a practical expedient instead of estimating incremental royalty contract revenue. However, there are certain other distribution arrangements that are fixed price or contain minimum guarantees that extend beyond one year. The transaction price allocated to remaining performance obligations within these fixed price or minimum guarantee distribution revenue contracts was $2.1 billion as of March 31, 2018 , and is expected to be recognized over the next 10 years. The Company's content licensing contracts and sports sublicensing deals are licenses of functional intellectual property. Certain of these arrangements extend beyond one year. The transaction price allocated to remaining performance obligations on these long-term contracts was $559 million as of March 31, 2018 , and is expected to be recognized over the next five years. The Company's brand licensing contracts are licenses of symbolic intellectual property. Certain of these arrangements extend beyond one year. The transaction price allocated to remaining performance obligations on these long-term contracts was $114 million as of March 31, 2018 , and is expected to be recognized over the next five years. Contract Balances A receivable is recorded when there is an unconditional right to consideration based on a contract with a customer. A contract liability, deferred revenue, is recorded when cash is received in advance of performing services. The following table presents (in millions) the Company’s opening and closing balances of the receivables and deferred revenues, as well as activity since the beginning of the period. December 31, 2017 Additions Reductions Foreign Currency March 31, 2018 Accounts receivable $ 1,838 2,981 (2,163 ) (2 ) $ 2,654 Deferred revenues $ 363 357 (303 ) (6 ) $ 411 December 31, 2016 Additions Reductions Foreign Currency March 31, 2017 Accounts receivable $ 1,495 1,613 (1,563 ) 15 $ 1,560 Deferred revenues $ 285 191 (218 ) 30 $ 288 Practical Expedients and Exemptions With the exception of commissions related to certain education products, sales commissions are generally expensed as incurred because contracts for which the sales commission are generated are one year or less or are not material. Sales commissions are recorded as a component of cost of revenues on the consolidated statements of operations. The financing component of content licensing arrangements is not capitalized because the period between delivery of the license and customer payment is one year or less or is not material. The value of unsatisfied performance obligations is not disclosed for: (i) contracts involving variable consideration for which revenues are recognized in accordance with the usage-based royalty exception, and (ii) contracts with an original expected length of one year or less.
Earnings Per Share	The weighted average number of diluted shares outstanding adjusts the weighted average number of shares of Series A, B and C common stock outstanding for the potential dilution that would occur if common stock equivalents, including convertible preferred stock and share-based awards, were converted into common stock or exercised, calculated using the treasury stock method. Series A, B and C diluted common stock includes the impact of the conversion of Series A-1 preferred stock, the impact of the conversion of Series C-1 preferred stock, and the impact of share-based compensation to the extent it is not anti-dilutive. For three months ended March 31, 2018 , the weighted average number of shares outstanding for the computation of diluted loss per share does not include 2 million of share-based awards, as the effects of these potentially outstanding shares would have been anti-dilutive. In calculating earnings per share, the Company follows the two-class method, which distinguishes between classes of securities based on the proportionate participation rights of each security type in the Company's undistributed income. The Company's Series A, B and C common stock and the Series C-1 convertible preferred stock are treated as one class for purposes of applying the two-class method, because they have substantially equal rights and share equally on an as-converted basis with respect to income available to Discovery, Inc. The computation of the diluted (loss) earnings per share of Series A, B and C common stockholders assumes the conversion of Series A-1 and C-1 convertible preferred stock, while the diluted (loss) earnings per share amounts of Series C-1 convertible preferred stock does not assume conversion of those shares.
Segment Reporting	The accounting policies of the reportable segments are the same as the Company’s, except that certain inter-segment transactions that are eliminated for consolidation are not eliminated at the segment level. Inter-segment transactions primarily include advertising and content purchases.
Adjusted OIBDA	The Company believes Adjusted OIBDA is relevant to investors because it allows them to analyze the operating performance of each segment using the same metric management uses. The Company excludes mark-to-market share-based compensation, restructuring and other charges, certain impairment charges, gains and losses on business and asset dispositions and Scripps Networks transaction and integration costs from the calculation of Adjusted OIBDA due to their impact on comparability between periods. The Company also excludes depreciation of fixed assets and amortization of intangible assets, as these amounts do not represent cash payments in the current reporting period.

Description of Business and B30

Description of Business and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Schedule of Impact of the Preferred Stock Modification on Earnings per Share	The table below sets forth the impact of the preferred stock modification to the Company's calculated basic earnings per share for the three months ended March 31, 2017 . Pre-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 0.74 Post-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 7.11 The table below sets forth the Company's calculated (loss) earnings per share. Three Months Ended March 31, 2018 2017 Basic net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.11 Diluted net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.06

Acquisitions and Dispositions A

Acquisitions and Dispositions Acquisitions and Dispositions (Tables)	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Schedule of Components of the Acquisition	The following table summarizes the components of the aggregate consideration paid for the acquisition of Scripps Networks (in millions of dollars and shares, except for per share amounts, share conversion ratio and stock option conversion ratio) as of March 6, 2018 . Scripps Networks equity Scripps Networks shares outstanding 131 Cash consideration including collar payment (per Scripps Networks share) $ 65.82 Cash portion of purchase price $ 8,590 Scripps Networks shares outstanding 131 Share conversion ratio (per Scripps Networks share) 1.0584 Discovery Series C common stock 138 Discovery Series C common stock price per share $ 23.01 Equity portion of purchase price $ 3,179 Shares under Scripps Networks share-based compensation programs Shares under Scripps Networks share-based compensation programs 3 Scripps Networks share-based compensation converting to cash 2 Average cash consideration (per share less applicable exercise price) $ 46.90 Cash portion of purchase price $ 88 Scripps Networks share-based compensation awards 1 Share-based compensation conversion ratio (based on intrinsic value per award) 3 Discovery Series C common stock issued (1) or share-based compensation converted (2) 3 Average equity value (intrinsic value of Discovery Series C common stock or options to be issued) $ 15.19 Share-based compensation equity value $ 51 Less: post-combination compensation expense $ (12 ) Equity portion of consideration $ 39 Scripps Networks transaction costs paid by Discovery $ 117 Total consideration paid $ 12,013
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The fair value of the assets acquired and liabilities assumed is presented in the table below (in millions). Preliminary September 25, 2017 Measurement Period Adjustments Final September 25, 2017 Goodwill $ 59 $ 16 $ 75 Intangible assets 71 (18 ) 53 Property plant and equipment, net 16 1 17 Other assets acquired 6 — 6 Liabilities assumed (8 ) 1 (7 ) Net assets acquired $ 144 $ — $ 144 The preliminary fair value of assets acquired and liabilities assumed, as well as a reconciliation to cash consideration transferred is presented in the table below (in millions). Preliminary November 30, 2017 Intangible assets $ 295 Content rights 176 Accounts receivable 84 Other assets 26 Other liabilities (230 ) Net assets acquired $ 351 Goodwill 136 Remeasurement gain on previously held equity interest (33 ) Carrying value of previously held equity interest (329 ) Redeemable noncontrolling interest (55 ) Cash consideration transferred $ 70 The preliminary fair value of assets acquired and liabilities assumed, as well as a reconciliation to cash consideration transferred is presented in the table below (in millions). Preliminary March 6, 2018 Accounts receivable $ 783 Other current assets 421 Content rights 1,088 Property and equipment 315 Goodwill 6,003 Intangible assets 9,175 Equity method investments, including note receivable 870 Other noncurrent assets 111 Current liabilities assumed (494 ) Debt assumed (2,481 ) Deferred income taxes (1,695 ) Other noncurrent liabilities (383 ) Noncontrolling interests (1,700 ) Total consideration paid $ 12,013
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The table below presents a summary of intangible assets acquired and weighted average estimated useful life of these assets. Fair Value Weighted Average Useful Life in Years Trademarks and trade names $ 1,225 10 Advertiser relationships 4,995 10 Advertising backlog 280 1 Affiliate relationships 2,455 12 Broadcast licenses 220 6 Total intangible assets acquired $ 9,175
Schedule of Business Acquisition, Pro Forma Information	The pro forma adjustments were based on available information and upon assumptions that the Company believes are reasonable to reflect the impact of these acquisitions on the Company's historical financial information on a supplemental pro forma basis (in millions). Pro Forma Combined Three Months Ended March 31, 2018 2017 Revenues $ 2,930 $ 2,569 Net income available to Discovery, Inc. $ 107 $ 171 Net income per share - basic $ 0.10 $ 0.20 Net income per share - diluted $ 0.10 $ 0.20 The following table presents their revenue and earnings as reported within the consolidated financial statements for the three months ended March 31, 2018 (in millions). Three Months Ended March 31, 2018 Revenues: Distribution $ 108 Advertising 244 Other 28 Total revenues $ 380 Net income $ (50 )

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2018
Investments [Abstract]
Summary of Investment Holdings	The Company’s investments consisted of the following (in millions). Category Balance Sheet Location March 31, 2018 December 31, 2017 Cash equivalents: Time deposits Cash and cash equivalents $ — $ 1,305 Trading securities: Money market funds Cash and cash equivalents 39 2,707 Mutual funds Prepaid expenses and other current assets 237 182 Equity method investments Equity method investments, including note receivable 1,231 335 Common stock investments with readily determinable fair values Other noncurrent assets 126 164 Equity investments without readily determinable fair values Other noncurrent assets 374 295 Total investments $ 2,007 $ 4,988
Summary of Significant Subsidiaries	The following are selected statement of operations information for each of the three months ended March 31, 2018 and 2017 (in millions). Three Months Ended March 31, 2018 2017 Selected statement of operations information: Revenues $ 286 $ 150 Costs of revenues 201 111 Operating income (loss) 12 (7 ) Pre-tax income (loss) from continuing operations before extraordinary items 7 (16 ) After-tax net income (loss) 4 (16 ) Net income (loss) attributable to the entity 4 (16 )
Schedule of Common Stock Investments with Readily Determinable Fair Value	The accumulated amounts associated with the components of the Company's common stock investments with readily determinable fair values, which are included in other non-current assets, are summarized in the table below (in millions). March 31, 2018 December 31, 2017 Cost $ 195 $ 195 Accumulated change in the value of: Equity securities recognized in other expense, net (39 ) (1 ) Unhedged equity securities recorded in other comprehensive income (a) — 32 Reclassification of accumulated other comprehensive income to retained earnings (a) 32 — Other-than-temporary impairment (62 ) (62 ) Carrying value $ 126 $ 164 (a) As of January 1, 2018 , upon adoption of ASU 2016-01, the Company recorded a transition adjustment to reclassify accumulated other comprehensive income associated with Lionsgate shares in the amount of $32 million pre-tax ( $26 million , net of tax) to retained earnings. Previously, amounts were recorded as a component of other comprehensive income.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value Inputs, Assets, Quantitative Information	Fair value is defined as the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants. Assets and liabilities carried at fair value are classified in the following three categories: Level 1 – Quoted prices for identical instruments in active markets. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Valuations derived from techniques in which one or more significant inputs are unobservable.
Schedule of Fair Value Inputs, Liabilities, Quantitative Information	Fair value is defined as the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants. Assets and liabilities carried at fair value are classified in the following three categories: Level 1 – Quoted prices for identical instruments in active markets. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Valuations derived from techniques in which one or more significant inputs are unobservable.
Schedule of Assets and Liabilities Measured on Recurring Basis	The tables below present assets and liabilities measured at fair value on a recurring basis (in millions). March 31, 2018 Category Balance Sheet Location Level 1 Level 2 Level 3 Total Assets Trading securities: Money market funds Cash and cash equivalents $ 39 $ — $ — $ 39 Mutual funds Prepaid expenses and other current assets 237 — — 237 AFS securities: Common stock Other noncurrent assets 126 — — 126 Derivatives: Cash flow hedges: Foreign exchange Prepaid expenses and other current assets — 8 — 8 No hedging designation: (a) Equity (Lionsgate Collar) Other noncurrent assets — 23 — 23 Total $ 402 $ 31 $ — $ 433 Liabilities Deferred compensation plan Accrued liabilities $ 245 $ — $ — $ 245 Derivatives: Cash flow hedges: Foreign exchange Accrued liabilities — 20 — 20 Net investment hedges: Cross-currency swaps Accrued liabilities — 19 — 19 Cross-currency swaps Other noncurrent liabilities — 145 — 145 No hedging designation: Cross-currency swaps Accrued liabilities — 1 — 1 Cross-currency swaps Other noncurrent liabilities — 7 — 7 Total $ 245 $ 192 $ — $ 437 December 31, 2017 Category Balance Sheet Location Level 1 Level 2 Level 3 Total Assets Cash equivalents: Time deposits Cash and cash equivalents $ — $ 1,305 $ — $ 1,305 Trading securities: Money market funds Cash and cash equivalents 2,707 — — 2,707 Mutual funds Prepaid expenses and other current assets 182 — — 182 Equity investments with readily determinable fair value: (a) Common stock Other noncurrent assets 82 — — 82 Common stock - pledged Other noncurrent assets 82 — — 82 Derivatives: Cash flow hedges: Foreign exchange Prepaid expenses and other current assets — 7 — 7 Net investment hedges: Cross-currency swaps Other noncurrent assets — 3 — 3 Foreign exchange Prepaid expenses and other current assets — 2 — 2 Fair value hedges: (a) Equity (Lionsgate Collar) Other noncurrent assets — 13 — 13 Total $ 3,053 $ 1,330 $ — $ 4,383 Liabilities Deferred compensation plan Accrued liabilities $ 182 $ — $ — $ 182 Derivatives: Cash flow hedges: Foreign exchange Accrued liabilities — 12 — 12 Net investment hedges: Cross-currency swaps Accrued liabilities — 13 — 13 Cross-currency swaps Other noncurrent liabilities — 98 — 98 Foreign exchange Accrued liabilities — 8 — 8 No hedging designation: Credit contracts Other noncurrent liabilities — 1 — 1 Cross-currency swaps Other noncurrent liabilities — 6 — 6 Total $ 182 $ 138 $ — $ 320 (a) Prior to January 1, 2018, and the adoption of ASU 2016-01, the Company applied hedge accounting to the Lionsgate Collar. (See Note 1 and Note 7.)

Content Rights (Tables)

Content Rights (Tables)	3 Months Ended
	Mar. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Schedule of Content Rights	The table below presents the components of content rights (in millions). March 31, 2018 December 31, 2017 Produced content rights: Completed $ 5,299 $ 4,355 In-production 690 442 Coproduced content rights: Completed 757 745 In-production 65 27 Licensed content rights: Acquired 1,078 1,070 Prepaid (a) 187 181 Content rights, at cost 8,076 6,820 Accumulated content rights expense (4,334 ) (4,197 ) Total content rights, net 3,742 2,623 Current portion (419 ) (410 ) Noncurrent portion $ 3,323 $ 2,213 (a) Prepaid licensed content rights includes payments for rights to the Olympic games of $61 million that are reflected as noncurrent content rights and $83 million that are reflected as current content rights assets on the consolidated balance sheet as of March 31, 2018 and December 31, 2017 , respectively.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Outstanding Debt	The table below presents the components of outstanding debt (in millions). March 31, 2018 December 31, 2017 5.625% Senior notes, semi-annual interest, due August 2019 $ 411 $ 411 2.200% Senior notes, semi-annual interest, due September 2019 500 500 Floating rate notes, quarterly interest, due September 2019 400 400 2.750% Senior notes, semi-annual interest, due November 2019 500 — 2.800% Senior notes, semi-annual interest, due June 2020 600 — 5.050% Senior notes, semi-annual interest, due June 2020 789 789 4.375% Senior notes, semi-annual interest, due June 2021 650 650 2.375% Senior notes, euro denominated, annual interest, due March 2022 370 358 3.300% Senior notes, semi-annual interest, due May 2022 500 500 3.500% Senior notes, semi-annual interest, due June 2022 400 — 2.950% Senior notes, semi-annual interest, due March 2023 1,200 1,200 3.250% Senior notes, semi-annual interest, due April 2023 350 350 3.800% Senior notes, semi-annual interest, due March 2024 450 450 2.500% Senior notes, sterling denominated, annual interest, due September 2024 563 538 3.900% Senior notes, semi-annual interest, due November 2024 500 — 3.450% Senior notes, semi-annual interest, due March 2025 300 300 3.950% Senior notes, semi-annual interest, due June 2025 500 — 4.900% Senior notes, semi-annual interest, due March 2026 700 700 1.900% Senior notes, euro denominated, annual interest, due March 2027 739 717 3.950% Senior notes, semi-annual interest, due March 2028 1,700 1,700 5.000% Senior notes, semi-annual interest, due September 2037 1,250 1,250 6.350% Senior notes, semi-annual interest, due June 2040 850 850 4.950% Senior notes, semi-annual interest, due May 2042 500 500 4.875% Senior notes, semi-annual interest, due April 2043 850 850 5.200% Senior notes, semi-annual interest, due September 2047 1,250 1,250 Term loans 2,000 — Revolving credit facility 425 425 Program financing line of credit 22 — Capital lease obligations 244 225 Total debt 19,513 14,913 Unamortized discount, premium and debt issuance costs, net (146 ) (128 ) Debt, net of unamortized discount, premium and debt issuance costs 19,367 14,785 Current portion of debt (153 ) (30 ) Noncurrent portion of debt $ 19,214 $ 14,755

Derivative Financial Instrume36

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes the impact of derivative financial instruments on the Company's consolidated balance sheets (in millions). There were no amounts eligible to be offset under master netting agreements as of March 31, 2018 and December 31, 2017 . March 31, 2018 December 31, 2017 Fair Value Fair Value Notional Prepaid expenses and other current assets Other non- current assets Accrued liabilities Other non- current liabilities Notional Prepaid expenses and other current assets Other non- current assets Accrued liabilities Other non- current liabilities Cash flow hedges: Foreign exchange $ 806 $ 8 $ — $ 20 $ — $ 817 $ 7 $ — $ 12 $ — Net investment hedges: (a) Cross-currency swaps 1,737 — — 19 145 1,708 — 3 13 98 Foreign exchange — — — — — 303 2 — 8 — Fair value hedges: Equity (Lionsgate collar) (b) — — — — — 97 — 13 — — No hedging designation: Interest rate swaps 25 — — — — 25 — — — — Cross-currency swaps 64 — — 1 7 64 — — — 6 Equity (Lionsgate collar) (b) 97 — 23 — — — — — — — Credit contracts — — — — — 665 — — — 1 Total $ 8 $ 23 $ 40 $ 152 $ 9 $ 16 $ 33 $ 105 (a) Excludes £400 million of sterling notes ( $563 million equivalent at March 31, 2018 ) designated as a net investment hedge. (See Note 6.) (b) Effective January 1, 2018, upon adoption of ASU 2016-01, the Lionsgate Collar no longer receives the hedge accounting designation. (See Note 1 and Note 4.)
Schedule of Derivative Instruments Designated as Cash Flow Hedges, Effect on Income and Other Comprehensive Income (Loss)	The following table presents the pretax impact of derivatives designated as cash flow hedges on income and other comprehensive income (loss) (in millions). Three Months Ended March 31, 2018 2017 Losses recognized in accumulated other comprehensive loss: Foreign exchange - derivative adjustments $ (10 ) $ (13 ) Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion): Foreign exchange - distribution revenue — (3 ) Foreign exchange - advertising revenue 1 — Foreign exchange - costs of revenues (4 ) 4 Interest rate - interest expense — (1 )
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)	The following table presents the pretax impact of derivatives designated as net investment hedges on other comprehensive income (loss) (in millions). Three Months Ended March 31, 2018 2017 Currency translation adjustments: Cross-currency swaps - changes in fair value $ (56 ) $ (9 ) Cross-currency swaps - interest settlements 7 5 Foreign exchange - changes in fair value (1 ) — Sterling Notes - changes in foreign exchange rates (25 ) — Total other comprehensive loss $ (75 ) $ (4 )
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table presents the pretax impact of derivatives designated as fair value hedges on income, including offsetting changes in fair value of the hedged items and amounts excluded from the assessment of effectiveness (in millions). Upon adoption of ASU 2016-01 on January 1, 2018 , the Company no longer designated any of its derivatives as fair value hedges. As a result, there was no activity related to derivatives designated as fair value hedges for the three months ended March 31, 2018 . There were no amounts of ineffectiveness recognized on fair value hedges for the three months ended March 31, 2017 . Three Months Ended March 31, 2017 Gains on changes in fair value of hedged AFS $ — Gains on changes in the intrinsic value of equity contracts — Fair value of equity contracts excluded from effectiveness assessment (2 ) Total in other expense, net $ (2 )
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table presents the pretax impact of derivatives not designated as hedges and recognized in other expense, net in the consolidated statements of operations (in millions). Three Months Ended March 31, 2018 2017 Cross-currency swaps $ (4 ) $ (1 ) Credit contracts (1 ) — Equity 10 — Total in other expense, net $ 5 $ (1 )

Redeemable Noncontrolling Int37

Redeemable Noncontrolling Interests (Tables)	3 Months Ended
	Mar. 31, 2018
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interests	The table below presents the reconciliation of changes in redeemable noncontrolling interests (in millions). Three Months Ended March 31, 2018 2017 Beginning balance $ 413 $ 243 Cash distributions to redeemable noncontrolling interests (2 ) (3 ) Comprehensive income adjustments: Net income attributable to redeemable noncontrolling interests 6 6 Other comprehensive income attributable to redeemable noncontrolling interests — 1 Currency translation on redemption values 2 1 Retained earnings adjustments: Adjustments of redemption values to the floor — 1 Ending balance $ 419 $ 249

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of Treasury Stock by Class	The table below presents a summary of common stock repurchases (in millions). Three Months Ended March 31, 2018 2017 Series C Common Stock: Shares repurchased — 5.2 Purchase price $ — $ 140
Schedule of Preferred Stock Repurchase	The table below presents a summary of Series C and Series C-1 convertible preferred stock repurchases made under the repurchase agreement (in millions). Three Months Ended March 31, 2018 2017 Series C Convertible Preferred Stock: Shares repurchased — 1.2 Purchase price $ — $ 60 Series C-1 Convertible Preferred Stock: Shares repurchased — — Purchase price $ — $ —
Components of Other Comprehensive Income (Loss)	The table below presents the tax effects related to each component of other comprehensive income (loss) and reclassifications made in the consolidated statements of operations (in millions). Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Pretax Tax Net-of-tax Pretax Tax Net-of-tax Currency translation adjustments: Unrealized gains (losses) Foreign currency $ 71 $ 7 $ 78 $ 71 $ 1 $ 72 Net investment hedges (75 ) — (75 ) (4 ) — (4 ) Total currency translation adjustments (4 ) 7 3 67 1 68 AFS adjustments: (a) Unrealized losses — — — (1 ) — (1 ) Total equity investment adjustments — — — (1 ) — (1 ) Derivative adjustments: Unrealized (losses) gains (10 ) 3 (7 ) (13 ) 5 (8 ) Reclassifications: Distribution revenue — — — 3 (1 ) 2 Advertising revenue (1 ) — (1 ) — — — Costs of revenues 4 (1 ) 3 (4 ) 1 (3 ) Interest expense — — — 1 — 1 Total derivative adjustments (7 ) 2 (5 ) (13 ) 5 (8 ) Other comprehensive (loss) income $ (11 ) $ 9 $ (2 ) $ 53 $ 6 $ 59 (a) Effective January 1, 2018 , upon adoption of ASU 2016-01, unrealized gains and losses on equity investments with readily determinable fair values are recorded in other expense, net. The Company recorded a transition adjustment to reclassify prior period amounts in other comprehensive income to retained earnings. (See Note 1 and Note 3.)
Schedule of Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The table below presents the changes in the components of accumulated other comprehensive loss , net of taxes (in millions). Three Months Ended March 31, 2018 Currency Translation AFS (a) Derivatives Accumulated Other Comprehensive Loss Beginning balance $ (615 ) $ 26 $ 4 $ (585 ) Other comprehensive income (loss) before reclassifications 3 — (7 ) (4 ) Reclassifications from accumulated other comprehensive loss to net income — — 2 2 Other comprehensive income (loss) 3 — (5 ) (2 ) Reclassifications to retained earnings resulting from the adoption of ASU 2016-01 — (26 ) — (26 ) Ending balance $ (612 ) $ — $ (1 ) $ (613 ) Three Months Ended March 31, 2017 Currency Translation AFS (a) Derivatives Accumulated Other Comprehensive Loss Beginning balance $ (797 ) $ 11 $ 24 $ (762 ) Other comprehensive income (loss) 68 (1 ) (8 ) 59 Other comprehensive income attributable to redeemable noncontrolling interests (1 ) — — (1 ) Ending balance $ (730 ) $ 10 $ 16 $ (704 ) (a) Effective January 1, 2018 , unrealized gains and losses on equity investments with readily determinable fair values are recorded in other expense, net. (See Note 1 and Note 3.)

Revenues (Tables)

Revenues (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table presents the Company’s revenues disaggregated by revenue source (in millions). Three Months Ended March 31, 2018 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 514 $ 537 $ — $ — Advertising 627 385 — — Other 33 176 35 — Total revenues $ 1,174 $ 1,098 $ 35 $ — Three Months Ended March 31, 2017 U.S. Networks International Networks Education and Other Corporate and inter-segment Revenues: Distribution $ 408 $ 447 $ — $ — Advertising 405 282 — — Other 16 18 37 — Total revenues $ 829 $ 747 $ 37 $ —
Schedule of Contract Balances	The following table presents (in millions) the Company’s opening and closing balances of the receivables and deferred revenues, as well as activity since the beginning of the period. December 31, 2017 Additions Reductions Foreign Currency March 31, 2018 Accounts receivable $ 1,838 2,981 (2,163 ) (2 ) $ 2,654 Deferred revenues $ 363 357 (303 ) (6 ) $ 411 December 31, 2016 Additions Reductions Foreign Currency March 31, 2017 Accounts receivable $ 1,495 1,613 (1,563 ) 15 $ 1,560 Deferred revenues $ 285 191 (218 ) 30 $ 288

Share-based Payments (Tables)

Share-based Payments (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Equity-Based Compensation Expense	The table below presents the components of share-based compensation expense (in millions). Three Months Ended March 31, 2018 2017 PRSUs $ 2 $ 9 RSUs 7 6 Stock options 5 3 SARs 1 3 Total share-based compensation expense $ 15 $ 21 Tax benefit recognized $ 3 $ 8
Schedule of Liability Classified Equity Awards	The table below presents current and non-current portions of liability-classified share-based compensation awards (in millions). March 31, 2018 December 31, 2017 Current portion of liability-classified awards: PRSUs $ 16 $ 12 SARs 2 — Non-current portion of liability-classified awards: PRSUs 9 32 SARs 2 3 Total liability-classified share-based compensation award liability $ 29 $ 47
Schedule of Other Share-based Compensation, Activity	The table below presents award activity (in millions, except weighted-average grant price) for PRSUs, RSUs and SARs. Three Months Ended March 31, 2018 Awards Weighted-Average Grant Price Awards granted: PRSUs 0.6 $ 24.06 RSUs (a) 6.3 $ 11.58 SARs 3.7 $ 22.37 Awards converted or settled: PRSUs 1.1 $ 40.23 RSUs 1.2 $ 26.75 SARs — $ — (a) RSU awards granted during the three months ended March 31, 2018 include 3.4 million awards granted to Scripps Networks employees following the acquisition of Scripps Networks at a grant price of $1.00 per share.
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The table below presents stock option activity (in millions, except weighted-average exercise price). Stock Options Weighted-Average Outstanding as of December 31, 2017 12.3 $ 27.46 Granted (a) 4.2 $ 21.11 Exercised (2.5 ) $ 16.21 Forfeited/cancelled (0.2 ) $ 30.97 Outstanding as of March 31, 2018 13.8 (a) Stock options granted during the three months ended March 31, 2018 include 2 million awards granted in connection with the acquisition of Scripps Networks.
Schedule of Unrecognized Compensation Cost, Nonvested Awards	The table below presents unrecognized compensation cost related to non-vested share-based awards and the weighted-average amortization period over which these expenses will be recognized as of March 31, 2018 (in millions, except years). Unrecognized Compensation Cost Weighted-Average Amortization Period (years) RSUs $ 104 2.31 PRSUs 28 1.74 Stock options 45 2.50 SARs 15 1.82 Total unrecognized compensation cost $ 192

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	The following table presents the components of the net periodic pension cost for the Pension Plan and SERP in millions. Three Months ended March 31, 2018 Pension Plan SERP Interest cost $ 0.3 $ 0.1 Expected return on plan assets, net of expenses (0.4 ) — Net periodic pension cost $ (0.1 ) $ 0.1
Schedule of Assumptions Used	ssumptions used in determining the Pension Plan and SERP expense, following the acquisition of Scripps Networks, were as follows. Three Months ended March 31, 2018 Pension Plan SERP Discount rate 3.70 % 3.41 % Long-term rate of return on plan assets 7.50 % N/A Rate of compensation increases 3.56 % 3.21 % Assumption Description Discount rate Based on a bond portfolio approach that includes securities rated Aa or better with maturities matching our expected benefit payments from the plans. Long-term rate of return on plan assets Based on the weighted-average expected rate of return and capital market forecasts for each asset class employed and also considers our historical compounded return on plan assets for 10 and 15 year periods. Increase in compensation levels Based on actual past experience and the near-term outlook. Mortality RP 2014 mortality tables adjusted and projected using the scale MP-2017 mortality improvement rates.

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	he following table reconciles the U.S. federal statutory income tax rate to the Company's effective income tax rate. Three Months Ended March 31, 2018 2017 U.S. federal statutory income tax provision $ 4 21 % $ (96 ) 35 % State and local income taxes, net of federal tax benefit 7 44 % (4 ) 2 % Effect of foreign operations (4 ) (21 )% 15 (6 )% Domestic production activity deductions — — % 8 (3 )% Change in uncertain tax positions — (2 )% — — % Renewable energy investments tax credits (See Note 3) — (1 )% 25 (9 )% U.S. legislative changes 19 109 % — — % Other, net (6 ) (32 )% (3 ) 1 % Income tax benefit (expense) $ 20 118 % $ (55 ) 20 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of (Loss) Income Available to Discovery Stockholders	The table below sets forth the computation for (loss) income allocated to Discovery, Inc. stockholders (in millions). Three Months Ended March 31, 2018 2017 Numerator: Net income $ 3 $ 221 Less: Allocation of undistributed loss (income) to Series A-1 convertible preferred stock 1 (26 ) Net income attributable to noncontrolling interests (5 ) — Net income attributable to redeemable noncontrolling interests (6 ) (6 ) Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share $ (7 ) $ 189 Allocation of net (loss) income to Discovery, Inc. Series A, B and C common stockholders and Series C-1 convertible preferred stockholders for basic net (loss) income per share: Series A, B and C common stockholders (6 ) 143 Series C-1 convertible preferred stockholders (1 ) 46 Total (7 ) 189 Add: Allocation of undistributed (loss) income to Series A-1 convertible preferred stockholders (1 ) 26 Net (loss) income allocated to Discovery, Inc. Series A, B and C common stockholders for diluted net income per share $ (8 ) $ 215
Schedule of Weighted Average Basic And Diluted Shares Outstanding	The table below sets forth the weighted average number of shares outstanding utilized in determining the denominator for basic and diluted (loss) earnings per share (in millions). Three Months Ended March 31, 2018 2017 Denominator — weighted average: Series A, B and C common shares outstanding — basic 422 389 Impact of assumed preferred stock conversion 187 195 Dilutive effect of share-based awards — 4 Series A, B and C common shares outstanding — diluted 609 588 Series C-1 convertible preferred stock outstanding — basic and diluted 6 6
Schedule of Basic and Diluted Earnings per Share	The table below sets forth the impact of the preferred stock modification to the Company's calculated basic earnings per share for the three months ended March 31, 2017 . Pre-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 0.74 Post-Exchange: Basic net income per share available to: Series A, B and C common stockholders $ 0.37 Series C-1 convertible preferred stockholders $ 7.11 The table below sets forth the Company's calculated (loss) earnings per share. Three Months Ended March 31, 2018 2017 Basic net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.11 Diluted net (loss) income per share allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders: Series A, B and C common stockholders $ (0.01 ) $ 0.37 Series C-1 convertible preferred stockholders $ (0.25 ) $ 7.06
Schedule of Antidilutive Securities Excluded from Computation of (Loss) Earnings Per Share	The table below presents the details of the anticipated stock repurchases and share-based awards that were excluded from the calculation of diluted (loss) earnings per share (in millions). Three Months Ended March 31, 2018 2017 Anti-dilutive share based awards 16 9 PRSUs whose performance targets have not been achieved 2 1

Supplemental Disclosures (Table

Supplemental Disclosures (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure Text Block Supplement [Abstract]
Schedule of Accrued Liabilities	March 31, 2018 December 31, 2017 Accrued payroll and related benefits $ 624 $ 535 Content rights payable 370 219 Accrued interest 140 148 Accrued income taxes 39 45 Current portion of share-based compensation liabilities 18 12 Other accrued liabilities 539 350 Total accrued liabilities $ 1,730 $ 1,309
Schedule of Other Expense, Net	Three Months Ended March 31, 2018 2017 Foreign currency losses, net $ (4 ) $ (9 ) Gain (loss) on derivative instruments, net 5 (3 ) Change in the value of common stock investments with readily determinable fair value (a) (38 ) — Interest income (b) 15 — Other expense, net — (1 ) Total other expense, net $ (22 ) $ (13 ) (a) As of January 1, 2018 , upon adoption of ASU 2016-01, equity investments with readily determinable fair value for which the Company has the intent to retain the investment are measured at fair value, with unrealized gains and losses recorded in other expense, net. (See Notes 1 and 3.) (b) Interest income for the three months ended March 31, 2018 is comprised of interest on proceeds from the issuance of senior notes used to fund the acquisition of Scripps Networks. As of March 31, 2018 , the Company had liquidated and utilized the proceeds in the acquisition of Scripps Networks.
Schedule of Cash Proceeds Received from Share-based Payment Awards	Share-based plan payments, net in the statement of cash flows consisted of the following (in millions). Three Months Ended March 31, 2018 2017 Tax settlements associated with share-based plans $ (16 ) $ (30 ) Proceeds from issuance of common stock in connection with share-based plans 39 22 Total share-based plan payments, net $ 23 $ (8 )
Schedule of Supplemental Cash Flow Information	Three Months Ended March 31, 2018 2017 Cash paid for taxes, net $ 44 $ 43 Cash paid for interest, net 199 66 Non-cash investing and financing activities: Equity issued for the acquisition of Scripps Networks 3,218 — Accrued purchases of property and equipment 13 21 Assets acquired under capital lease arrangements 24 29

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, Revenues and Expenses	The table below presents a summary of the transactions with related parties, including OWN prior to the November 30, 2017 acquisition (in millions). Three Months Ended March 31, 2018 2017 Revenues and service charges: Liberty Group $ 145 $ 126 Equity method investees 38 34 Other 10 13 Total revenues and service charges $ 193 $ 173 Interest income $ — $ 4 Expenses $ (55 ) $ (30 )
Schedule of Related Party Transactions Receivables	The table below presents receivables due from related parties (in millions). March 31, 2018 December 31, 2017 Receivables $ 131 $ 105 Note receivable (a) $ 103 $ — (a) Amount relates to a note receivable with UKTV, an equity method investee acquired in conjunction with the acquisition of Scripps Networks. (See Note 3.)

Commitments, Contingencies, a46

Commitments, Contingencies, and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Significant Contractual Commitments	The Company’s contractual commitments increased significantly following the acquisition of Scripps Networks. Below are the Company's updated combined contractual commitments as of March 31, 2018 , including related payments due by period (in millions). Leases Year Ending December 31, Operating Capital Content Other Total 2018 $ 69 $ 42 $ 1,187 $ 361 $ 1,659 2019 78 40 641 348 1,107 2020 60 37 764 211 1,072 2021 48 33 342 82 505 2022 17 26 350 39 432 Thereafter 37 104 771 93 1,005 Total minimum payments 309 282 4,055 1,134 5,780 Amounts representing interest — (38 ) — — (38 ) Total $ 309 $ 244 $ 4,055 $ 1,134 $ 5,742

Reportable Segments (Tables)

Reportable Segments (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule of Revenues by Segment	Revenues Three Months Ended March 31, 2018 2017 U.S. Networks $ 1,174 $ 829 International Networks 1,098 747 Education and Other 35 37 Total revenues $ 2,307 $ 1,613
Schedule of Adjusted OIBDA by Segment	Adjusted OIBDA Three Months Ended March 31, 2018 2017 U.S. Networks $ 652 $ 501 International Networks 137 194 Education and Other 3 (6 ) Corporate and inter-segment eliminations (95 ) (86 ) Total Adjusted OIBDA $ 697 $ 603
Schedule of Reconciliation of Adjusted OIBDA to Operating Income	Reconciliation of Net (Loss) Income available to Discovery, Inc. to total Adjusted OIBDA Three Months Ended March 31, 2018 2017 Net (loss) income available to Discovery, Inc. $ (8 ) $ 215 Net income attributable to noncontrolling interests 5 — Net income attributable to redeemable noncontrolling interests 6 6 Income tax (benefit) expense (20 ) 55 (Loss) income before income taxes (17 ) 276 Other expense, net 22 13 Loss from equity investees, net 22 53 Loss on extinguishment of debt — 54 Interest expense 177 91 Operating income 204 487 Restructuring and other charges 241 24 Depreciation and amortization 193 80 Mark-to-market share-based compensation 3 12 Scripps Networks transaction and integration costs 56 — Total Adjusted OIBDA $ 697 $ 603
Schedule of Total Assets by Segment	Total Assets March 31, 2018 December 31, 2017 U.S. Networks $ 19,756 $ 4,127 International Networks 7,756 5,187 Education and Other 373 394 Corporate and inter-segment eliminations 6,773 12,847 Total assets $ 34,658 $ 22,555
Schedule of Content Expense and Impairment	Content Rights Expense and Impairment Three Months Ended March 31, 2018 2017 U.S. Networks $ 275 $ 178 International Networks 474 277 Education and Other 1 2 Corporate and inter-segment eliminations 1 1 Total content rights expense and impairment $ 751 $ 458
Schedule of Revenues by Geography	Revenues by Geography Three Months Ended March 31, 2018 2017 U.S. $ 1,209 $ 866 Non-U.S. 1,098 747 Total revenues $ 2,307 $ 1,613
Schedule of Property and Equipment by Geography	Property and Equipment by Geography March 31, 2018 December 31, 2017 U.S. $ 480 $ 309 U.K. 181 173 Other 267 115 Total property and equipment, net $ 928 $ 597

Restructuring and Other Charg48

Restructuring and Other Charges Restructuring and Other Charges (Tables)	3 Months Ended
	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs by Reportable Segment	Restructuring and other charges by reportable segment were as follows (in millions). Three Months Ended March 31, 2018 2017 U.S. Networks $ 34 $ 4 International Networks 100 17 Education and Other — 1 Corporate 107 2 Total restructuring and other charges $ 241 $ 24
Schedule of Restructuring and Related Costs	Three Months Ended March 31, 2018 2017 Restructuring charges $ 164 $ 24 Other charges 77 — Total restructuring and other charges $ 241 $ 24
Schedule of Restructuring and Related Costs Changes in Exit Liabilities	Changes in restructuring and other liabilities recorded in accrued liabilities by major category were as follows (in millions). Contract Terminations Employee Terminations Total December 31, 2017 $ 1 $ 42 $ 43 Net Accruals (a) 21 136 157 Cash Paid (1 ) (22 ) (23 ) March 31, 2018 $ 21 $ 156 $ 177 (a) Net accruals for the three months ended March 31, 2018 do not include $7 million of Scripps Networks equity awards exchanged for Discovery shares as of March 6, 2018 recorded in APIC.

Condensed Consolidating Finan49

Condensed Consolidating Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and ASSETS Current assets: Cash and cash equivalents $ — $ — $ 367 $ 295 $ 150 $ — $ 812 Receivables, net — — 429 1,404 821 — 2,654 Content rights, net — — 3 300 116 — 419 Prepaid expenses and other current assets 77 40 203 136 180 — 636 Inter-company trade receivables, net — — 148 — — (148 ) — Total current assets 77 40 1,150 2,135 1,267 (148 ) 4,521 Investment in and advances to subsidiaries 7,816 (4,119 ) 6,800 — (2,706 ) (7,791 ) — Noncurrent content rights, net — — 673 1,632 1,018 — 3,323 Goodwill, net — — 3,677 3,428 5,997 — 13,102 Intangible assets, net — — 258 1,479 9,088 — 10,825 Equity method investments, including note receivable — — 24 333 874 — 1,231 Other noncurrent assets, including property and equipment, net — 20 394 834 428 (20 ) 1,656 Total assets $ 7,893 $ (4,059 ) $ 12,976 $ 9,841 $ 15,966 $ (7,959 ) $ 34,658 LIABILITIES AND EQUITY Current liabilities: Current portion of debt $ — $ — $ 129 $ 21 $ 3 $ — $ 153 Other current liabilities — — 519 1,239 554 — 2,312 Inter-company trade payables, net — — — 148 — (148 ) — Total current liabilities — — 648 1,408 557 (148 ) 2,465 Noncurrent portion of debt — — 16,126 607 2,481 — 19,214 Other noncurrent liabilities 4 — 321 607 2,053 (19 ) 2,966 Total liabilities 4 — 17,095 2,622 5,091 (167 ) 24,645 Redeemable noncontrolling interests — — — 419 — — 419 Equity attributable to Discovery, Inc. 7,889 (4,059 ) (4,119 ) 6,800 10,875 (9,497 ) 7,889 Noncontrolling interests — — — — — 1,705 1,705 Total equity 7,889 (4,059 ) (4,119 ) 6,800 10,875 (7,792 ) 9,594 Total liabilities and equity $ 7,893 $ (4,059 ) $ 12,976 $ 9,841 $ 15,966 $ (7,959 ) $ 34,658 Condensed Consolidating Balance Sheet December 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and ASSETS Current assets: Cash and cash equivalents $ — $ — $ 6,800 $ 509 $ — $ — $ 7,309 Receivables, net — — 410 1,428 — — 1,838 Content rights, net — — 4 406 — — 410 Prepaid expenses and other current assets 49 32 204 149 — — 434 Inter-company trade receivables, net — — 205 — — (205 ) — Total current assets 49 32 7,623 2,492 — (205 ) 9,991 Investment in and advances to subsidiaries 4,563 4,532 6,951 — 3,056 (19,102 ) — Noncurrent content rights, net — — 672 1,541 — — 2,213 Goodwill, net — — 3,677 3,396 — — 7,073 Intangible assets, net — — 259 1,511 — — 1,770 Equity method investments, including note receivable — — 25 310 — — 335 Other noncurrent assets, including property and equipment, net — 20 364 809 — (20 ) 1,173 Total assets $ 4,612 $ 4,584 $ 19,571 $ 10,059 $ 3,056 $ (19,327 ) $ 22,555 LIABILITIES AND EQUITY Current liabilities: Current portion of debt $ — $ — $ 7 $ 23 $ — $ — $ 30 Other current liabilities — — 572 1,269 — — 1,841 Inter-company trade payables, net — — — 205 — (205 ) — Total current liabilities — — 579 1,497 — (205 ) 1,871 Noncurrent portion of debt — — 14,163 592 — — 14,755 Other noncurrent liabilities 2 — 297 606 21 (20 ) 906 Total liabilities 2 — 15,039 2,695 21 (225 ) 17,532 Redeemable noncontrolling interests — — — 413 — — 413 Total equity 4,610 4,584 4,532 6,951 3,035 (19,102 ) 4,610 Total liabilities and equity $ 4,612 $ 4,584 $ 19,571 $ 10,059 $ 3,056 $ (19,327 ) $ 22,555
Condensed Consolidating Statement of Operations	Condensed Consolidating Statement of Operations Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Operations Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Operations Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Revenues $ — $ — $ 488 $ 1,549 $ 273 $ (3 ) $ 2,307 Costs of revenues, excluding depreciation and amortization — — 107 866 92 (5 ) 1,060 Selling, general and administrative 26 — 80 436 65 2 609 Depreciation and amortization — — 17 93 83 — 193 Restructuring and other charges 8 — 43 98 92 — 241 Total costs and expenses 34 — 247 1,493 332 (3 ) 2,103 Operating (loss) income (34 ) — 241 56 (59 ) — 204 Equity in earnings of subsidiaries 17 71 9 — 47 (144 ) — Interest expense — — (157 ) (12 ) (8 ) — (177 ) (Loss) income from equity investees, net — — — (31 ) 9 — (22 ) Other (expense) income, net — — (24 ) 4 (2 ) — (22 ) (Loss) income before income taxes (17 ) 71 69 17 (13 ) (144 ) (17 ) Income tax benefit (expense) 8 — 2 (2 ) 12 — 20 Net (loss) income (9 ) 71 71 15 (1 ) (144 ) 3 Net income attributable to noncontrolling interests — — — — — (5 ) (5 ) Net income attributable to redeemable noncontrolling interests — — — — — (6 ) (6 ) Net (loss) income available to Discovery, Inc. $ (9 ) $ 71 $ 71 $ 15 $ (1 ) $ (155 ) $ (8 ) Condensed Consolidating Statement of Operations Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Revenues $ — $ — $ 491 $ 1,125 $ — $ (3 ) $ 1,613 Costs of revenues, excluding depreciation and amortization — — 108 499 — — 607 Selling, general and administrative 4 — 74 340 — (3 ) 415 Depreciation and amortization — — 12 68 — — 80 Restructuring and other charges — — 16 8 — — 24 Total costs and expenses 4 — 210 915 — (3 ) 1,126 Operating (loss) income (4 ) — 281 210 — — 487 Equity in earnings of subsidiaries 218 218 140 — 145 (721 ) — Interest expense — — (86 ) (5 ) — — (91 ) Loss on extinguishment of debt — — (54 ) — — — — (54 ) Income (loss) from equity investees, net — — 1 (54 ) — — (53 ) Other (expense) income, net — — (27 ) 14 — — (13 ) Income before income taxes 214 218 255 165 145 (721 ) 276 Income tax benefit (expense) 1 — (37 ) (19 ) — — (55 ) Net income 215 218 218 146 145 (721 ) 221 Net income attributable to redeemable noncontrolling interests — — — — — (6 ) (6 ) Net income available to Discovery, Inc. $ 215 $ 218 $ 218 $ 146 $ 145 $ (727 ) $ 215
Condensed Consolidating Statement of Comprehensive Income (Loss)	Condensed Consolidating Statement of Comprehensive Income Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Comprehensive Income Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Condensed Consolidating Statement of Comprehensive Income (Loss) Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Net (loss) income $ (9 ) $ 71 $ 71 $ 15 $ (1 ) $ (144 ) $ 3 Other comprehensive income (loss) adjustments, net of tax: Currency translation 3 23 23 23 (5 ) (64 ) 3 Derivatives (5 ) (5 ) (5 ) (5 ) (3 ) 18 (5 ) Comprehensive (loss) income (11 ) 89 89 33 (9 ) (190 ) 1 Comprehensive income attributable to noncontrolling interests — — — — — (5 ) (5 ) Comprehensive income attributable to redeemable noncontrolling interests (2 ) (2 ) (2 ) (2 ) (1 ) 3 (6 ) Comprehensive (loss) income attributable to Discovery, Inc. $ (13 ) $ 87 $ 87 $ 31 $ (10 ) $ (192 ) $ (10 ) Condensed Consolidating Statement of Comprehensive Income (Loss) Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Net income $ 215 $ 218 $ 218 $ 146 $ 145 $ (721 ) $ 221 Other comprehensive income (loss) adjustments, net of tax: Currency translation 68 68 68 68 45 (249 ) 68 Available-for-sale securities (1 ) (1 ) (1 ) (1 ) (1 ) 4 (1 ) Derivatives (8 ) (8 ) (8 ) (9 ) (5 ) 30 (8 ) Comprehensive income 274 277 277 204 184 (936 ) 280 Comprehensive income attributable to redeemable noncontrolling interests (1 ) (1 ) (1 ) (1 ) (1 ) (2 ) (7 ) Comprehensive income attributable to Discovery, Inc. $ 273 $ 276 $ 276 $ 203 $ 183 $ (938 ) $ 273
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows Three Months Ended March 31, 2018 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Operating Activities Cash (used in) provided by operating activities $ (54 ) $ (8 ) $ 17 $ 210 $ (5 ) $ — $ 160 Investing Activities Business acquisitions, net of cash acquired (8,714 ) — — — 149 — (8,565 ) (Payments for) proceeds from investments — — — (28 ) 6 — (22 ) Purchases of property and equipment — — (25 ) (23 ) — — (48 ) Payments for derivative instruments, net — — — (42 ) — — (42 ) Other investing activities, net — — — 2 — — 2 Cash (used in) provided by investing activities (8,714 ) — (25 ) (91 ) 155 — (8,675 ) Financing Activities Borrowings under term loan agreements — — 2,000 — — — 2,000 Principal repayments of capital lease obligations — — (2 ) (11 ) — — (13 ) Distributions to redeemable noncontrolling interests — — — (2 ) — — (2 ) Share-based plan proceeds, net 23 — — — — — 23 Borrowing under program financing line of credit — — 22 — — — 22 Other financing activities, net 8,745 8 (8,445 ) (319 ) — — (11 ) Cash provided by (used in) financing activities 8,768 8 (6,425 ) (332 ) — — 2,019 Effect of exchange rate changes on cash and cash equivalents — — — (1 ) — — (1 ) Net change in cash and cash equivalents — — (6,433 ) (214 ) 150 — (6,497 ) Cash and cash equivalents, beginning of period — — 6,800 509 — — 7,309 Cash and cash equivalents, end of period $ — $ — $ 367 $ 295 $ 150 $ — $ 812 Condensed Consolidating Statement of Cash Flows Three Months Ended March 31, 2017 (in millions) Discovery DCH DCL Non-Guarantor Other Non- Reclassifications Discovery and Operating Activities Cash provided by (used in) operating activities $ 46 $ (2 ) $ 61 $ 150 $ — $ — $ 255 Investing Activities Payments for (proceeds from) investments — — 1 (189 ) — — (188 ) Purchases of property and equipment — — (20 ) (27 ) — — (47 ) Distributions from equity method investees — — — 5 — — 5 Proceeds from derivative instruments, net — — — 5 — — 5 Inter-company distributions — — 2 — — (2 ) — Other investing activities, net — — — 1 — — 1 Cash used in investing activities — — (17 ) (205 ) — (2 ) (224 ) Financing Activities Commercial paper borrowings, net — — 54 — — — 54 Borrowings under revolving credit facility — — 150 — — — 150 Principal repayments of revolving credit facility — — (125 ) — — — (125 ) Borrowings from debt, net of discount and including premiums — — 659 — — — 659 Principal repayments of debt, including discount payment and premiums to par value — — (650 ) — — — (650 ) Principal repayments of capital lease obligations — — (2 ) (11 ) — — (13 ) Repurchases of stock (200 ) — — — — — (200 ) Cash settlement of common stock repurchase contracts 58 — — — — — 58 Distributions to redeemable noncontrolling interests — — — (3 ) — — (3 ) Share-based plan payments, net (8 ) — — — — — (8 ) Inter-company contributions and other financing activities, net 104 2 (132 ) 18 — 2 (6 ) Cash (used in) provided by financing activities (46 ) 2 (46 ) 4 — 2 (84 ) Effect of exchange rate changes on cash and cash equivalents — — — 20 — — 20 Net change in cash and cash equivalents — — (2 ) (31 ) — — (33 ) Cash and cash equivalents, beginning of period — — 20 280 — — 300 Cash and cash equivalents, end of period $ — $ — $ 18 $ 249 $ — $ — $ 267

Description of Business and B50

Description of Business and Basis of Presentation (Principals of Consolidation and Basis of Presentation) (Details) - Advance Programming Holdings, LLC	Aug. 07, 2017shares
Series C Convertible Preferred Stock
Concentration Risk [Line Items]
Common stock, conversion basis (in shares)	2
Series C-1 Convertible Preferred Stock
Concentration Risk [Line Items]
Common stock, conversion basis (in shares)	19.3648

Description of Business and B51

Description of Business and Basis of Presentation (Impact of the Preferred Stock Modification) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Series A, B and C Common Stock
Class of Stock [Line Items]
Net (loss) income per share, basic (in dollars per share)	$ (0.01)	$ 0.37
Series C Convertible Preferred Stock
Class of Stock [Line Items]
Net (loss) income per share, basic (in dollars per share)		7.11
Pre-Exchange | Series A, B and C Common Stock
Class of Stock [Line Items]
Net (loss) income per share, basic (in dollars per share)		0.37
Pre-Exchange | Series C Convertible Preferred Stock
Class of Stock [Line Items]
Net (loss) income per share, basic (in dollars per share)		$ 0.74

Description of Business and B52

Description of Business and Basis of Presentation (Accounting and Reporting Pronouncements Adopted) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 4,657		$ 4,632
Retained Earnings | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		$ 26
Accumulated Other Comprehensive Loss | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		(26)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 7

Description of Business and B53

Description of Business and Basis of Presentation (Concentrations Risk) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Concentration Risk [Line Items]
Derivative asset, fair value of collateral	$ 43
Credit Risk
Concentration Risk [Line Items]
Derivative assets	$ 31
Customer Concentration Risk | U.S. Networks | Largest 10 Distributors | Distribution
Concentration Risk [Line Items]
Concentration risk, percentage	95.00%
Customer Concentration Risk | International Networks | Largest 10 Distributors | Distribution
Concentration Risk [Line Items]
Concentration risk, percentage	40.00%

Acquisitions and Dispositions (

Acquisitions and Dispositions (Scripps Networks Interactive, Inc. ("Scripps Networks")) (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 06, 2018	Mar. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill, net		$ 13,102	$ 7,073
Scripps Networks Interactive
Business Acquisition [Line Items]
Share price portion paid in cash (in dollars per share)	$ 65.82
Goodwill, net	$ 6,003
Scripps Networks Interactive | U.S. Networks
Business Acquisition [Line Items]
Goodwill, net	5,400
Scripps Networks Interactive | International Networks
Business Acquisition [Line Items]
Goodwill, net	$ 600
No Election or Mixed Consideration Election | Scripps Networks Interactive
Business Acquisition [Line Items]
Share price portion paid in cash (in dollars per share)	$ 65.82
Equity interest issued or issuable (in shares)	1.0584
Cash Consideration Election | Scripps Networks Interactive
Business Acquisition [Line Items]
Share price portion paid in cash (in dollars per share)	$ 90
Stock Consideration Election | Scripps Networks Interactive
Business Acquisition [Line Items]
Equity interest issued or issuable (in shares)	3.9392

Acquisitions and Dispositions55

Acquisitions and Dispositions (Components of the Acquisition of Scripps Networks Consideration) (Details) - Scripps Networks Interactive $ / shares in Units, shares in Millions, $ in Millions	Mar. 06, 2018USD ($)$ / sharesRateshares
Business Acquisition [Line Items]
Scripps Networks shares outstanding (in shares) | shares	131
Cash consideration including collar payment (per Scripps Networks share) (in dollars per share) | $ / shares	$ 65.82
Cash portion of purchase price	$ 8,590
Share conversion ratio (per Scripps Networks share)	1.0584
Equity portion of purchase price	$ 3,179
Shares under Scripps Networks share-based compensation programs (in shares) | shares	3
Scripps Networks share-based compensation converting to cash (in shares) | shares	2
Average cash consideration (per share less applicable exercise price) (in dollars per share) | $ / shares	$ 46.90
Cash portion of purchase price	$ 88
Share-based compensation conversion ratio (based on intrinsic value per award) | Rate	300.00%
Discovery Series C common stock issued (1) or share-based compensation converted (2) (in shares) | shares	3
Average equity value (intrinsic value of Discovery Series C common stock or options to be issued) (in dollars per share) | $ / shares	$ 15.19
Share-based compensation equity value	$ 51
Less: post-combination compensation expense	(12)
Equity portion of consideration	39
Scripps Networks transaction costs paid by Discovery	117
Total consideration paid	$ 12,013
Series C Common Stock
Business Acquisition [Line Items]
Discovery Series C common stock (in shares) | shares	138
Discovery Series C common stock price per share (in dollars per share) | $ / shares	$ 23.01
Scripps Networks share-based compensation awards | shares	1

Acquisitions and Dispositions56

Acquisitions and Dispositions (Fair Value of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Mar. 06, 2018	Nov. 30, 2017	Mar. 31, 2018	Dec. 31, 2017	Sep. 25, 2017
Business Acquisition [Line Items]
Goodwill, net			$ 13,102	$ 7,073
Redeemable noncontrolling interest			$ (419)	$ (413)
Scripps Networks Interactive
Business Acquisition [Line Items]
Accounts receivable	$ 783
Other current assets	421
Content rights	1,088
Property and equipment	315
Goodwill, net	6,003
Intangible assets	9,175
Equity method investments, including note receivable	870
Other noncurrent assets	111
Current liabilities assumed	(494)
Debt assumed	(2,481)
Deferred income taxes	(1,695)
Other noncurrent liabilities	(383)
Noncontrolling interests	(1,700)
Total consideration paid	12,013
Cash consideration transferred	$ 8,590
Harpo
Business Acquisition [Line Items]
Accounts receivable		$ 84
Intangible assets		295
Content rights		176
Other assets		26
Other liabilities		(230)
Net assets acquired		351
Goodwill, net		136
Remeasurement gain on previously held equity interest		(33)
Carrying value of previously held equity interest		(329)
Redeemable noncontrolling interest		(55)
Cash consideration transferred		$ 70
VTEN
Business Acquisition [Line Items]
Intangible assets					$ 53
Property and equipment					17
Other assets					6
Goodwill, net					75
Liabilities assumed					(7)
Net assets acquired					144
VTEN | Preliminary
Business Acquisition [Line Items]
Intangible assets					71
Property and equipment					16
Other assets					6
Goodwill, net					59
Liabilities assumed					(8)
Net assets acquired					144
VTEN | Measurement Period Adjustments
Business Acquisition [Line Items]
Intangible assets					(18)
Property and equipment					1
Other assets					0
Goodwill, net					16
Liabilities assumed					1
Net assets acquired					$ 0

Acquisitions and Dispositions57

Acquisitions and Dispositions (Intangible Assets Acquired) (Details) - Scripps Networks Interactive $ in Millions	Mar. 06, 2018USD ($)
Business Acquisition [Line Items]
Fair Value	$ 9,175
Trademarks and trade names
Business Acquisition [Line Items]
Fair Value	$ 1,225
Weighted Average Useful Life in Years	10 years
Advertiser relationships
Business Acquisition [Line Items]
Fair Value	$ 4,995
Weighted Average Useful Life in Years	10 years
Advertising backlog
Business Acquisition [Line Items]
Fair Value	$ 280
Weighted Average Useful Life in Years	1 year
Affiliate relationships
Business Acquisition [Line Items]
Fair Value	$ 2,455
Weighted Average Useful Life in Years	12 years
Broadcast licenses
Business Acquisition [Line Items]
Fair Value	$ 220
Weighted Average Useful Life in Years	6 years

Acquisitions and Dispositions58

Acquisitions and Dispositions (OWN) (Details) - Harpo - USD ($) $ in Millions	Nov. 30, 2017	Mar. 31, 2018	Nov. 29, 2017
Business Acquisition [Line Items]
Percentage of voting interests acquired	73.75%		49.50%
Cash portion of purchase price	$ 70
Remeasurement gain on previously held equity interest	$ 33
Variable interest entity, consolidated, carrying amount, assets		$ 733
Variable interest entity, consolidated, carrying amount, liabilities		$ 267
Acquired finite-lived intangible assets, weighted average useful life		9 years
Subsequent Acquisition, Window One
Business Acquisition [Line Items]
Step acquisition, subsequent acquisition, term of window	90 days
Subsequent Acquisition, Window Two
Business Acquisition [Line Items]
Step acquisition, subsequent acquisition, term of window	2 years 6 months

Acquisitions and Dispositions59

Acquisitions and Dispositions (The Enthusiast Network, Inc.) (Details) - USD ($)	Sep. 25, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Adjustments of redemption values to the floor		$ 0	$ 1,000,000
Redeemable noncontrolling interest balance		419,000,000	$ 249,000,000	$ 413,000,000	$ 243,000,000
VTEN
Business Acquisition [Line Items]
Post-acquisition ownership percentage of the acquiror in the combined entity	67.50%
Remeasurement gain (loss)	$ 0
Acquired finite-lived intangible assets, weighted average useful life	16 years
Initial fair value of redeemable noncontrolling interest	$ 82,000,000	82,000,000
Adjustments of redemption values to the floor	38,000,000
Redeemable noncontrolling interest balance	$ 120,000,000	$ 120,000,000
VTEN | GoldenTree Asset Management L.P.
Business Acquisition [Line Items]
Post-acquisition ownership percentage of the acquiror in the combined entity	32.50%
VTEN | Call Right
Business Acquisition [Line Items]
Term from which rights exercisable	30 days
VTEN | Put Right | GoldenTree Asset Management L.P.
Business Acquisition [Line Items]
Term from which rights exercisable	30 days

Acquisitions and Dispositions60

Acquisitions and Dispositions (Other) (Details) - Series of Individually Immaterial Business Acquisitions - USD ($) $ in Millions	Mar. 02, 2018	Sep. 01, 2017
TURKEY
Business Acquisition [Line Items]
Total consideration paid	$ 5
POLAND
Business Acquisition [Line Items]
Total consideration paid		$ 4

Acquisitions and Dispositions61

Acquisitions and Dispositions (Schedule of Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Net income available to Discovery, Inc.	$ 107	$ 171
Scripps Networks Interactive, Harpo, and VTEN
Business Acquisition [Line Items]
Revenues	$ 2,930	$ 2,569
Net income per share - basic (in dollars per share)	$ 0.10	$ 0.20
Net income per share - diluted (in dollars per share)	$ 0.10	$ 0.20

Acquisitions and Dispositions62

Acquisitions and Dispositions (Impact of Business Combinations) (Details) - Scripps Networks Interactive, Harpo, and VTEN $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Business Acquisition [Line Items]
Total revenues	$ 380
Net income	(50)
Distribution
Business Acquisition [Line Items]
Total revenues	108
Advertising
Business Acquisition [Line Items]
Total revenues	244
Other
Business Acquisition [Line Items]
Total revenues	$ 28

Acquisitions and Dispositions63

Acquisitions and Dispositions (Dispositions) (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations - Education Business - USD ($)	Apr. 30, 2018	Mar. 31, 2018
Business Acquisition [Line Items]
Ownership percentage by parent		12.50%
Carrying amount of assets		$ 129,000,000
Carrying amount of liabilities		$ 80,000,000
Subsequent Event
Business Acquisition [Line Items]
Ownership percentage by parent	87.50%
Consideration received on sale	$ 120,000,000
Loss on disposition	$ 0

Investments (Schedule of Invest

Investments (Schedule of Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Investments [Abstract]
Time deposits	$ 0	$ 1,305
Money market funds	39	2,707
Trading securities - mutual funds	237	182
Equity method investments	1,231	335
Common stock investments with readily determinable fair values	126	164
Equity investments without readily determinable fair values	374	295
Total Investments	$ 2,007	$ 4,988

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 06, 2018	Dec. 31, 2017	Aug. 11, 2011
Investments [Line Items]
Senior notes issued					$ 6,800
Variable interest, maximum exposure to loss	$ 737	$ 737
Carrying value of investments in VIE's accounted for using the equity method	692	692			181
Variable interest entity losses		11	$ 43
Income tax benefit (expense)		20	(55)
Solar Ventures
Investments [Line Items]
Variable interest, maximum exposure to loss	3	3
Carrying value of investments in VIE's accounted for using the equity method	105	105			$ 98
Variable interest entity losses		8	83
Payments to acquire equity method investments		17	181
Income tax benefit (expense)		2	56
Tax benefit from entities' passive losses		2	31
Income tax credits and adjustments			$ 25
Refinery29JV [Member] [Member]
Investments [Line Items]
Other investments	35	35
UKTV
Investments [Line Items]
Equity method investments	506	506
Note receivable	103	103
UKTV | Scripps Networks Interactive
Investments [Line Items]
Equity method investment, ownership percentage						50.00%
UKTV | Scripps Networks Interactive
Investments [Line Items]
Equity method investment, ownership percentage				50.00%
nC Plus
Investments [Line Items]
Equity method investments	299	299
nC Plus | Scripps Networks Interactive
Investments [Line Items]
Equity method investment, ownership percentage				32.00%
Various equity method investments, aggregated
Investments [Line Items]
Amortization of intangible assets	1
Expected future amortization of intangible assets	$ 180	$ 180

Investments (Summarized Financi

Investments (Summarized Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Selected statement of operations information:
Revenues	$ 286	$ 150
Costs of revenues	201	111
Operating income (loss)	12	(7)
Pre-tax income (loss) from continuing operations before extraordinary items	7	(16)
After-tax net income (loss)	4	(16)
Net income (loss) attributable to the entity	$ 4	$ (16)

Investments (Common Stock Inves

Investments (Common Stock Investments with Readily Determinable Fair Value ) (Details) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2018	Mar. 31, 2018	Sep. 30, 2016	Dec. 31, 2017	Jan. 01, 2018	Nov. 12, 2015
Accumulated Other Comprehensive Loss | Accounting Standards Update 2016-01
Schedule of Available-for-sale Securities [Line Items]
Reclassification of accumulated other comprehensive income to retained earnings				$ 0	$ (32)
Cumulative effect of new accounting principle in period of adoption					(26)
Retained Earnings | Accounting Standards Update 2016-01
Schedule of Available-for-sale Securities [Line Items]
Reclassification of accumulated other comprehensive income to retained earnings					32
Cumulative effect of new accounting principle in period of adoption					$ 26
Lionsgate Collar
Schedule of Available-for-sale Securities [Line Items]
Purchase of available for sale securities (in shares)	5
Purchase of stock, percentage ownership after transaction	3.00%
Cost	$ 195	$ 195		195
Equity securities recognized in other expense, net		(39)		(1)
Unhedged equity securities recorded in other comprehensive income		0		32
Other-than-temporary impairment		(62)	$ (62)
Carrying value	$ 126	$ 126		$ 164
Percentage of shares pledged as collateral						50.00%

Investments (Equity Investments

Investments (Equity Investments Without Readily Determinable Fair Values Assessed Under the Measurement Alternative) (Details) - GroupNineMediaJV $ in Millions	Mar. 31, 2018USD ($)
Other Investment Not Readily Marketable [Line Items]
Ownership percentage by parent	42.00%
Other investments	$ 212

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	$ 0	$ 1,305
Trading securities	237	182
Common stock	126	164
Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	23	16
Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	1	0
Accrued liabilities | Not Designated as Hedging Instrument | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Accrued liabilities | Not Designated as Hedging Instrument | Credit contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	20	12
Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	19	13
Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	8
Accrued liabilities | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	7	6
Other noncurrent liabilities | Not Designated as Hedging Instrument | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	1
Other noncurrent liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	145	98
Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Other noncurrent liabilities | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	433	4,383
Liabilities	437	320
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	402	3,053
Liabilities	245	182
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	31	1,330
Liabilities	192	138
Fair Value, Measurements, Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0	0
Liabilities	0	0
Fair Value, Measurements, Recurring | Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		1,305
Trading securities	39	2,707
Fair Value, Measurements, Recurring | Cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		0
Trading securities	39	2,707
Fair Value, Measurements, Recurring | Cash and cash equivalents | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		1,305
Trading securities	0	0
Fair Value, Measurements, Recurring | Cash and cash equivalents | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		0
Trading securities	0	0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	237	182
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	237	182
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	8	7
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	8	7
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		2
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		2
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock	126	82
Common stock - pledged		82
Fair Value, Measurements, Recurring | Other noncurrent assets | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock	126	82
Common stock - pledged		82
Fair Value, Measurements, Recurring | Other noncurrent assets | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock	0	0
Common stock - pledged		0
Fair Value, Measurements, Recurring | Other noncurrent assets | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock	0	0
Common stock - pledged		0
Fair Value, Measurements, Recurring | Other noncurrent assets | Not Designated as Hedging Instrument | Lionsgate Collar | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	23
Fair Value, Measurements, Recurring | Other noncurrent assets | Not Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Other noncurrent assets | Not Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	23
Fair Value, Measurements, Recurring | Other noncurrent assets | Not Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Other noncurrent assets | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Fair Value, Measurements, Recurring | Other noncurrent assets | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Other noncurrent assets | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Fair Value, Measurements, Recurring | Other noncurrent assets | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Lionsgate Collar | Equity Contract
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		13
Fair Value, Measurements, Recurring | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		13
Fair Value, Measurements, Recurring | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Lionsgate Collar | Equity Contract | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	245	182
Fair Value, Measurements, Recurring | Accrued liabilities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	245	182
Fair Value, Measurements, Recurring | Accrued liabilities | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	1
Fair Value, Measurements, Recurring | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	1
Fair Value, Measurements, Recurring | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	20	12
Fair Value, Measurements, Recurring | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	20	12
Fair Value, Measurements, Recurring | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	19	13
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	19	13
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		8
Fair Value, Measurements, Recurring | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		8
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Designated as Hedging Instrument | Cross-currency swaps | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Designated as Hedging Instrument | Cross-currency swaps | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	7	6
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	7	6
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		1
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		1
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	145	98
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 145	98
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Other noncurrent liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		$ 0

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Billions	Mar. 31, 2018	Dec. 31, 2017
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes, fair value	$ 16.9	$ 14.8

Content Rights (Schedule Of Con

Content Rights (Schedule Of Content Rights) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Licensed content rights:
Accumulated content rights expense	$ (4,334)	$ (4,197)
Total content rights, net	3,742	2,623
Current portion	(419)	(410)
Noncurrent portion	3,323	2,213
Content rights
Produced content rights:
Completed	5,299	4,355
In-production	690	442
Coproduced content rights:
Completed	757	745
In-production	65	27
Licensed content rights:
Acquired	1,078	1,070
Prepaid	187	181
Content rights, at cost	8,076	6,820
Olypmic games
Licensed content rights:
Current portion	$ (61)
Noncurrent portion		$ 83

Debt (Outstanding Debt) (Detail

Debt (Outstanding Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Capital lease obligations	$ 244	$ 225
Total debt	19,513	14,913
Unamortized discount, premium and debt issuance costs, net	(146)	(128)
Debt, net of unamortized discount, premium and debt issuance costs	19,367	14,785
Current portion of debt	(153)	(30)
Noncurrent portion of debt	19,214	14,755
Loans Payable
Debt Instrument [Line Items]
Total debt	2,000	0
Revolving credit facility | Line of Credit
Debt Instrument [Line Items]
Total debt	425	425
Program financing line of credit | Line of Credit
Debt Instrument [Line Items]
Total debt	22	0
5.625% Senior notes, semi-annual interest, due August 2019
Debt Instrument [Line Items]
Total debt	$ 411	411
Debt instrument interest rate	5.625%
2.200% Senior notes, semi-annual interest, due September 2019
Debt Instrument [Line Items]
Total debt	$ 500	500
Debt instrument interest rate	2.20%
Floating rate notes, quarterly interest, due September 2019
Debt Instrument [Line Items]
Total debt	$ 400	400
2.750% Senior notes, semi-annual interest, due November 2019
Debt Instrument [Line Items]
Total debt	$ 500	0
Debt instrument interest rate	2.75%
2.800% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Total debt	$ 600	0
Debt instrument interest rate	2.80%
5.050% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Total debt	$ 789	789
Debt instrument interest rate	5.05%
4.375% Senior notes, semi-annual interest, due June 2021
Debt Instrument [Line Items]
Total debt	$ 650	650
Debt instrument interest rate	4.375%
2.375% Senior notes, euro denominated, annual interest, due March 2022
Debt Instrument [Line Items]
Total debt	$ 370	358
Debt instrument interest rate	2.375%
3.300% Senior notes, semi-annual interest, due May 2022
Debt Instrument [Line Items]
Total debt	$ 500	500
Debt instrument interest rate	3.30%
3.500% Senior notes, semi-annual interest, due June 2022
Debt Instrument [Line Items]
Total debt	$ 400	0
Debt instrument interest rate	3.50%
2.950% Senior notes, semi-annual interest, due March 2023
Debt Instrument [Line Items]
Total debt	$ 1,200	1,200
Debt instrument interest rate	2.95%
3.250% Senior notes, semi-annual interest, due April 2023
Debt Instrument [Line Items]
Total debt	$ 350	350
Debt instrument interest rate	3.25%
3.800% Senior notes, semi-annual interest, due March 2024
Debt Instrument [Line Items]
Total debt	$ 450	450
Debt instrument interest rate	3.80%
2.500% Senior notes, sterling denominated, annual interest, due September 2024
Debt Instrument [Line Items]
Total debt	$ 563	538
Debt instrument interest rate	2.50%
3.900% Senior notes, semi-annual interest, due November 2024
Debt Instrument [Line Items]
Total debt	$ 500	0
Debt instrument interest rate	3.90%
3.450% Senior notes, semi-annual interest, due March 2025
Debt Instrument [Line Items]
Total debt	$ 300	300
Debt instrument interest rate	3.45%
3.950% Senior notes, semi-annual interest, due June 2025
Debt Instrument [Line Items]
Total debt	$ 500	0
Debt instrument interest rate	3.95%
4.900% Senior notes, semi-annual interest, due March 2026
Debt Instrument [Line Items]
Total debt	$ 700	700
Debt instrument interest rate	4.90%
1.900% Senior notes, euro denominated, annual interest, due March 2027
Debt Instrument [Line Items]
Total debt	$ 739	717
Debt instrument interest rate	1.90%
3.950% Senior notes, semi-annual interest, due March 2028
Debt Instrument [Line Items]
Total debt	$ 1,700	1,700
Debt instrument interest rate	3.95%
5.000% Senior notes, semi-annual interest, due September 2037
Debt Instrument [Line Items]
Total debt	$ 1,250	1,250
Debt instrument interest rate	5.00%
6.350% Senior notes, semi-annual interest, due June 2040
Debt Instrument [Line Items]
Total debt	$ 850	850
Debt instrument interest rate	6.35%
4.950% Senior notes, semi-annual interest, due May 2042
Debt Instrument [Line Items]
Total debt	$ 500	500
Debt instrument interest rate	4.95%
4.875% Senior notes, semi-annual interest, due April 2043
Debt Instrument [Line Items]
Total debt	$ 850	850
Debt instrument interest rate	4.875%
5.200% Senior notes, semi-annual interest, due September 2047
Debt Instrument [Line Items]
Total debt	$ 1,250	$ 1,250
Debt instrument interest rate	5.20%

Debt (Senior Notes) (Details)

Debt (Senior Notes) (Details) £ in Millions, $ in Millions	Apr. 03, 2018USD ($)	Mar. 06, 2018USD ($)	Mar. 13, 2017USD ($)	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)	Sep. 21, 2017GBP (£)$ / £	Sep. 21, 2017USD ($)$ / £
Debt Instrument [Line Items]
Remaining aggregate principle balance				$ 19,367		$ 14,785
Long-term debt, gross				19,513		14,913
Loss on extinguishment of debt				$ 0	$ 54
2.750% Senior notes, semi-annual interest, due November 2019
Debt Instrument [Line Items]
Debt instrument interest rate				2.75%
Long-term debt, gross				$ 500		0
2.800% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Debt instrument interest rate				2.80%
Long-term debt, gross				$ 600		0
3.500% Senior notes, semi-annual interest, due June 2022
Debt Instrument [Line Items]
Debt instrument interest rate				3.50%
Long-term debt, gross				$ 400		0
3.900% Senior notes, semi-annual interest, due November 2024
Debt Instrument [Line Items]
Debt instrument interest rate				3.90%
Long-term debt, gross				$ 500		0
3.950% Senior notes, semi-annual interest, due June 2025
Debt Instrument [Line Items]
Debt instrument interest rate				3.95%
Long-term debt, gross				$ 500		0
2.200% Senior notes, semi-annual interest, due September 2019
Debt Instrument [Line Items]
Debt instrument interest rate				2.20%
Long-term debt, gross				$ 500		500
2.950% Senior notes, semi-annual interest, due March 2023
Debt Instrument [Line Items]
Debt instrument interest rate				2.95%
Long-term debt, gross				$ 1,200		1,200
3.950% Senior notes, semi-annual interest, due March 2028
Debt Instrument [Line Items]
Debt instrument interest rate				3.95%
Long-term debt, gross				$ 1,700		1,700
5.000% Senior notes, semi-annual interest, due September 2037
Debt Instrument [Line Items]
Debt instrument interest rate				5.00%
Long-term debt, gross				$ 1,250		1,250
5.200% Senior notes, semi-annual interest, due September 2047
Debt Instrument [Line Items]
Debt instrument interest rate				5.20%
Long-term debt, gross				$ 1,250		1,250
Floating rate notes, quarterly interest, due September 2019
Debt Instrument [Line Items]
Long-term debt, gross				$ 400		400
3.800% Senior notes, semi-annual interest, due March 2024
Debt Instrument [Line Items]
Debt instrument interest rate				3.80%
Long-term debt, gross				$ 450		450
4.900% Senior notes, semi-annual interest, due March 2026
Debt Instrument [Line Items]
Debt instrument interest rate				4.90%
Long-term debt, gross				$ 700		700
5.050% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Debt instrument interest rate				5.05%
Long-term debt, gross				$ 789		789
5.625% Senior notes, semi-annual interest, due August 2019
Debt Instrument [Line Items]
Debt instrument interest rate				5.625%
Long-term debt, gross				$ 411		$ 411
Senior Notes
Debt Instrument [Line Items]
Debt issuance cost				1
Loss on extinguishment of debt				54
Payment for debt extinguishment or debt prepayment cost				50
Write off of deferred debt issuance cost				2
Repayments of debt				1
Senior Notes | Scripps Senior Notes
Debt Instrument [Line Items]
Reduction in the carrying amount of the senior notes, which will be amortized to interest expense until maturity		$ 19
Remaining aggregate principle balance				$ 243
Senior Notes | Scripps Senior Notes | Subsequent Event
Debt Instrument [Line Items]
Debt conversion, original debt, amount	$ 2,300
Senior Notes | 2.750% Senior notes, semi-annual interest, due November 2019
Debt Instrument [Line Items]
Debt instrument interest rate		2.75%
Senior Notes | 2.750% Senior notes, semi-annual interest, due November 2019 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument interest rate	2.75%
Senior Notes | 2.800% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Debt instrument interest rate		2.80%
Senior Notes | 2.800% Senior notes, semi-annual interest, due June 2020 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument interest rate	2.80%
Senior Notes | 3.500% Senior notes, semi-annual interest, due June 2022
Debt Instrument [Line Items]
Debt instrument interest rate		3.50%
Senior Notes | 3.500% Senior notes, semi-annual interest, due June 2022 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument interest rate	3.50%
Senior Notes | 3.900% Senior notes, semi-annual interest, due November 2024
Debt Instrument [Line Items]
Debt instrument interest rate		3.90%
Senior Notes | 3.900% Senior notes, semi-annual interest, due November 2024 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument interest rate	3.90%
Senior Notes | 3.950% Senior notes, semi-annual interest, due June 2025
Debt Instrument [Line Items]
Debt instrument interest rate		3.95%
Senior Notes | 3.950% Senior notes, semi-annual interest, due June 2025 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument interest rate	3.95%
Senior Notes | 2.200% Senior notes, semi-annual interest, due September 2019
Debt Instrument [Line Items]
Debt instrument interest rate							2.20%	2.20%
Long-term debt, gross								$ 500
Senior Notes | 2.950% Senior notes, semi-annual interest, due March 2023
Debt Instrument [Line Items]
Debt instrument interest rate							2.95%	2.95%
Long-term debt, gross								$ 1,200
Senior Notes | 3.950% Senior notes, semi-annual interest, due March 2028
Debt Instrument [Line Items]
Debt instrument interest rate							3.95%	3.95%
Long-term debt, gross								$ 1,700
Senior Notes | 5.000% Senior notes, semi-annual interest, due September 2037
Debt Instrument [Line Items]
Debt instrument interest rate							5.00%	5.00%
Long-term debt, gross								$ 1,250
Senior Notes | 5.200% Senior notes, semi-annual interest, due September 2047
Debt Instrument [Line Items]
Debt instrument interest rate							5.20%	5.20%
Long-term debt, gross								$ 1,250
Senior Notes | Floating rate notes, quarterly interest, due September 2019
Debt Instrument [Line Items]
Long-term debt, gross								400
Senior Notes | 3.800% Senior notes, semi-annual interest, due March 2024
Debt Instrument [Line Items]
Debt instrument interest rate			3.80%
Long-term debt, gross			$ 450
Unamortized discount			1
Debt issuance cost			$ 4
Senior Notes | 4.900% Senior notes, semi-annual interest, due March 2026
Debt Instrument [Line Items]
Debt instrument interest rate			4.90%
Long-term debt, gross			$ 200
Debt issuance cost			2
Unamortized premium			10
Senior Notes | 5.050% Senior notes, semi-annual interest, due June 2020
Debt Instrument [Line Items]
Debt instrument interest rate				5.05%
Long-term debt, gross			$ 600
Senior Notes | 5.625% Senior notes, semi-annual interest, due August 2019
Debt Instrument [Line Items]
Debt instrument interest rate				5.625%
Sterling Notes | Designated as Hedging Instrument | Net investment hedges
Debt Instrument [Line Items]
Long-term debt, gross							£ 400	$ 563
Sterling Notes | 2.500% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate							2.50%	2.50%
Long-term debt, gross								$ 540
Exchange rate at issuance (in usd per gbp) | $ / £							1.35	1.35
Unamortized discount								$ 11
Debt issuance costs, net								$ 57
Scripps Networks Interactive | Senior Notes | Scripps Senior Notes
Debt Instrument [Line Items]
Principal amount of liabilities assumed		$ 2,500

Debt (Term Loans) (Details)

Debt (Term Loans) (Details) - USD ($) $ in Billions	Aug. 11, 2017	Mar. 06, 2018	Mar. 31, 2018
Debt Instrument [Line Items]
Unsecured long-term debt, noncurrent	$ 1
Outstanding balance			$ 2
Unsecured Debt
Debt Instrument [Line Items]
Commitment fee percentage		0.20%
Unsecured Debt | Three Year Delayed Draw Tranche Unsecured Term Loan Credit Facility
Debt Instrument [Line Items]
Borrowings schedule repayment period, in years	3 years
Unsecured Debt | Five Year Delayed Draw Tranche Unsecured Term Loan Credit Facility
Debt Instrument [Line Items]
Borrowings schedule repayment period, in years	5 years

Debt (Revolving Credit Facility

Debt (Revolving Credit Facility) (Details)	Aug. 11, 2017USD ($)renewalRate	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Aug. 10, 2017USD ($)
Line of Credit Facility [Line Items]
Long-term debt, gross | $		$ 19,513,000,000	$ 14,913,000,000
Unused capacity, commitment fee percentage		0.20%
London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Percentage bearing variable interest, percentage rate		1.30%
Base Rate
Line of Credit Facility [Line Items]
Percentage bearing variable interest, percentage rate		0.30%
Maximum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	550.00%
Minimum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	100.00%
Step Down 1 | Maximum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	500.00%
Step Down 1 | Minimum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	100.00%
Step Down 2 | Maximum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	450.00%
Step Down 2 | Minimum
Line of Credit Facility [Line Items]
Supplementary leverage ratio | Rate	100.00%
Revolving credit facility
Line of Credit Facility [Line Items]
Revolving line of credit, maximum borrowing capacity | $	$ 2,500,000,000			$ 2,000,000,000
Number of renewal periods | renewal	2
Term of renewal period	364 days
Weighted average interest rate		3.14%	2.69%
Revolving credit facility | Line of Credit
Line of Credit Facility [Line Items]
Long-term debt, gross | $		$ 425,000,000	$ 425,000,000
Outstanding borrowings | $		$ 0	$ 0
Revolver sublimit for standby letters of credit
Line of Credit Facility [Line Items]
Revolving line of credit, maximum borrowing capacity | $	$ 100,000,000
Revolver sublimit for swing line loans
Line of Credit Facility [Line Items]
Revolving line of credit, maximum borrowing capacity | $	$ 50,000,000

Debt (Program Financing Line of

Debt (Program Financing Line of Credit) (Details) - Secured Debt - Line of Credit - USD ($)	Mar. 31, 2018	Jan. 12, 2018
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 26,000,000
Line of credit	$ 22,000,000

Derivative Financial Instrume77

Derivative Financial Instruments (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Derivative [Line Items]
Amounts eligible to be offset under master netting agreements	$ 0		$ 0
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Net deferred losses on derivative instruments expected to be reclassified from AOCI to income in the next 12 months	(13,000,000)
Fair Value Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Amounts of ineffectiveness recognized	$ 0	$ 0

Derivative Financial Instrume78

Derivative Financial Instruments (Schedule of Derivative Instruments, Fair Value) (Details) £ in Millions, $ in Millions	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 21, 2017GBP (£)	Sep. 21, 2017USD ($)
Derivatives, Fair Value [Line Items]
Long-term debt, gross	$ 19,513	$ 14,913
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	8	9
Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	23	16
Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	40	33
Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	152	105
Not Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional	25	25
Not Designated as Hedging Instrument | Interest rate swaps | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Interest rate swaps | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Interest rate swaps | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Not Designated as Hedging Instrument | Interest rate swaps | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Not Designated as Hedging Instrument | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Notional	64	64
Not Designated as Hedging Instrument | Cross-currency swaps | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Cross-currency swaps | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Cross-currency swaps | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	1	0
Not Designated as Hedging Instrument | Cross-currency swaps | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	7	6
Not Designated as Hedging Instrument | Equity (Lionsgate collar)
Derivatives, Fair Value [Line Items]
Notional	97	0
Not Designated as Hedging Instrument | Equity (Lionsgate collar) | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Equity (Lionsgate collar) | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	23	0
Not Designated as Hedging Instrument | Equity (Lionsgate collar) | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Not Designated as Hedging Instrument | Equity (Lionsgate collar) | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Not Designated as Hedging Instrument | Credit contracts
Derivatives, Fair Value [Line Items]
Notional	0	665
Not Designated as Hedging Instrument | Credit contracts | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Credit contracts | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Not Designated as Hedging Instrument | Credit contracts | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Not Designated as Hedging Instrument | Credit contracts | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	1
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Derivatives, Fair Value [Line Items]
Notional	806	817
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	8	7
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	20	12
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Net investment hedges | Designated as Hedging Instrument | Sterling Notes
Derivatives, Fair Value [Line Items]
Long-term debt, gross			£ 400	$ 563
Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Derivatives, Fair Value [Line Items]
Notional	0	303
Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	2
Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	8
Net investment hedges | Designated as Hedging Instrument | Foreign exchange | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Notional	1,737	1,708
Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	3
Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	19	13
Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	145	98
Fair Value Hedging | Designated as Hedging Instrument | Equity (Lionsgate collar)
Derivatives, Fair Value [Line Items]
Notional	0	97
Fair Value Hedging | Designated as Hedging Instrument | Equity (Lionsgate collar) | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	0
Fair Value Hedging | Designated as Hedging Instrument | Equity (Lionsgate collar) | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value	0	13
Fair Value Hedging | Designated as Hedging Instrument | Equity (Lionsgate collar) | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	0	0
Fair Value Hedging | Designated as Hedging Instrument | Equity (Lionsgate collar) | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Fair Value	$ 0	$ 0

Derivative Financial Instrume79

Derivative Financial Instruments (Schedule of Income and Comprehensive Income (Loss) Impact of Items Designated as Cash Flow Hedges) (Details) - Cash Flow Hedging - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange - derivative adjustments	$ (10)	$ (13)
Foreign exchange | Distribution
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion)	0	(3)
Foreign exchange | Advertising
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion)	1	0
Foreign exchange | Costs of revenues
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion)	(4)	4
Interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into income from accumulated other comprehensive loss (effective portion)	$ 0	$ (1)

Derivative Financial Instrume80

Derivative Financial Instruments Derivative Financial Instruments (Schedule of Comprehensive Income (Loss) Impact of Items Designated as Net Investment Hedges) (Details) - Designated as Hedging Instrument - Net investment hedges - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Currency translation adjustments:
Total other comprehensive loss	$ (75)	$ (4)
Cross-currency swaps
Currency translation adjustments:
Cross-currency swaps - changes in fair value	(56)	(9)
Cross-currency swaps - interest settlements	7	5
Foreign exchange
Currency translation adjustments:
Changes in fair value and foreign exchange rates	(1)	0
Foreign exchange | Sterling Notes
Currency translation adjustments:
Changes in fair value and foreign exchange rates	$ (25)	$ 0

Derivative Financial Instrume81

Derivative Financial Instruments (Schedule of Pre-Tax Impact of Items Designated as Fair Value Hedges) (Details) - Fair Value Hedging - Designated as Hedging Instrument - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Total in other expense, net	$ 0	$ 0
Equity Contract
Derivative [Line Items]
Gains on changes in fair value of hedged AFS		0
Gains on changes in the intrinsic value of equity contracts		0
Fair value of equity contracts excluded from effectiveness assessment		(2,000,000)
Equity Contract | Other expense, net
Derivative [Line Items]
Total in other expense, net		$ (2,000,000)

Derivative Financial Instrume82

Derivative Financial Instruments Derivative Financial Instruments (Schedule of Pre-Tax Impact of Items not Designated as Hedges) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total in other expense, net	$ 5	$ (1)
Cross-currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total in other expense, net	(4)	(1)
Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total in other expense, net	(1)	0
Equity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Total in other expense, net	$ 10	$ 0

Redeemable Noncontrolling Int83

Redeemable Noncontrolling Interests (Schedule of Redeemable Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Increase (Decrease) in Temporary Equity
Beginning balance	$ 413	$ 243
Cash distributions to redeemable noncontrolling interests	(2)	(3)
Comprehensive income adjustments:
Net income attributable to redeemable noncontrolling interests	6	6
Other comprehensive income attributable to redeemable noncontrolling interests	0	1
Currency translation on redemption values	2	1
Retained earnings adjustments:
Adjustments of redemption values to the floor	0	1
Ending balance	$ 419	$ 249

Redeemable Noncontrolling Int84

Redeemable Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions	Sep. 25, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests		$ 419	$ 413
Redeemable noncontrolling interest balance		419	$ 413	$ 249	$ 243
OWN
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interest balance		56
VTEN
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interest balance	$ 120	120
Post-acquisition ownership percentage of the acquiror in the combined entity	67.50%
Initial fair value of redeemable noncontrolling interest	$ 82	82
Adjustment to redemption value		$ 38
Discovery Family
Redeemable Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners		40.00%
Terms of put arrangement		1 year
Discovery Japan
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interest balance		$ 28
Ownership percentage by noncontrolling owners		20.00%
GoldenTree Asset Management L.P. | VTEN
Redeemable Noncontrolling Interest [Line Items]
Post-acquisition ownership percentage of the acquiror in the combined entity	32.50%

Equity (Narrative) (Details)

Equity (Narrative) (Details) $ / shares in Units, $ in Millions	Mar. 06, 2018shares	Mar. 15, 2017USD ($)	Jun. 30, 2018shares	Mar. 31, 2018USD ($)series$ / sharesshares	Mar. 31, 2017shares	Dec. 31, 2017USD ($)	Aug. 07, 2017shares	Aug. 06, 2017directorshares	Dec. 31, 2016USD ($)
Class of Stock [Line Items]
Treasury stock, value | $				$ 6,737		$ 6,737
Price paid per share, percentage of average price paid multiplied by conversion rate				99.00%
Additional paid-in capital | $				$ 10,576		$ 7,295
Historical stock repurchases, net of new issuances, as a percentage of shares outstanding at inception of stock repurchase program				33.00%
Prepaid stock repurchase contract
Class of Stock [Line Items]
Cash settlement amount common stock repurchase contract | $		$ 58
Prepaid repurchase of common stock | $									$ 57
Cash premium received common stock repurchase contract | $		$ 1
Advance Newhouse
Class of Stock [Line Items]
Number of preferred directors | director								3
Series C Common Stock
Class of Stock [Line Items]
Treasury stock (in shares)				164,000,000
Treasury stock, value | $				$ 6,600
Common stock, conversion basis (in shares)								1
Shares repurchased (in shares)				0	5,200,000
Series A Common Stock
Class of Stock [Line Items]
Treasury stock (in shares)				3,000,000
Treasury stock, value | $				$ 171
Common stock, conversion basis (in shares)								1
Preferred Stock
Class of Stock [Line Items]
Number of classes of stock | series				2
Series A-1 Convertible Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)				8,000,000
Series C-1 Convertible Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)				6,000,000
Series C-1 Convertible Preferred Stock | Advance Programming Holdings, LLC
Class of Stock [Line Items]
Common stock, conversion basis (in shares)							19.3648
Repurchases of preferred stock (in shares)				0	0
Series C-1 Convertible Preferred Stock | Advance Programming Holdings, LLC | Scenario, Forecast
Class of Stock [Line Items]
Repurchases of preferred stock (in shares)			0
Series A Convertible Preferred Stock
Class of Stock [Line Items]
Liquidation preference per share (in dollars per share) | $ / shares				$ 0.01
Series A Convertible Preferred Stock | Advance Newhouse
Class of Stock [Line Items]
Required ownership percentage to retain special voting rights				80.00%
Scripps Networks Interactive | Series C Common Stock
Class of Stock [Line Items]
Issuance of stock in connection with acquisition (in shares)	139,000,000
Equity interest issued or issuable (in shares)	1,000,000

Equity (Stock Repurchases) (Det

Equity (Stock Repurchases) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Class of Stock [Line Items]
Purchase price	$ 0	$ 200
Series C Common Stock
Class of Stock [Line Items]
Shares repurchased (in shares)	0	5,200,000
Purchase price	$ 0	$ 140
Advance Programming Holdings, LLC | Series C Convertible Preferred Stock
Class of Stock [Line Items]
Shares repurchased (in shares)	0	1,200,000
Purchase price	$ 0	$ 60
Advance Programming Holdings, LLC | Series C-1 Convertible Preferred Stock
Class of Stock [Line Items]
Shares repurchased (in shares)	0	0
Purchase price	$ 0	$ 0

Equity (Components of Other Com

Equity (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Currency translation adjustments, Pretax
Unrealized gains (losses)	$ (4)	$ 67
Currency translation adjustments, Tax Benefit (Expense)
Unrealized gains (losses)	7	1
Currency translation adjustments, Net-of-tax
Unrealized gains (losses)	3	68
AFS adjustments, Pretax
Unrealized losses	0	(1)
Total equity investment adjustments	0	(1)
AFS adjustments, Tax Benefit (Expense)
Unrealized losses	0	0
Total equity investment adjustments	0	0
AFS adjustments, Net-of-tax
Unrealized losses	0	(1)
Total equity investment adjustments	0	(1)
Derivative adjustments, Pretax
Unrealized (losses) gains	(10)	(13)
Total derivative adjustments	(7)	(13)
Derivative adjustments, Tax Benefit (Expense)
Unrealized (losses) gains	3	5
Total derivative adjustments	2	5
Derivative adjustments, Net-of-tax
Unrealized (losses) gains	(7)	(8)
Total derivative adjustments	(5)	(8)
Other comprehensive (loss) income, Pretax	(11)	53
Other comprehensive (loss) income, Tax Benefit (Expense)	9	6
Other comprehensive (loss) income, Net-of-tax	(2)	59
Distribution revenue
Derivative adjustments, Pretax
Reclassifications	0	3
Derivative adjustments, Tax Benefit (Expense)
Reclassifications	0	(1)
Derivative adjustments, Net-of-tax
Reclassifications	0	2
Advertising revenue
Derivative adjustments, Pretax
Reclassifications	(1)	0
Derivative adjustments, Tax Benefit (Expense)
Reclassifications	0	0
Derivative adjustments, Net-of-tax
Reclassifications	(1)	0
Costs of revenues
Derivative adjustments, Pretax
Reclassifications	4	(4)
Derivative adjustments, Tax Benefit (Expense)
Reclassifications	(1)	1
Derivative adjustments, Net-of-tax
Reclassifications	3	(3)
Interest expense
Derivative adjustments, Pretax
Reclassifications	0	1
Derivative adjustments, Tax Benefit (Expense)
Reclassifications	0	0
Derivative adjustments, Net-of-tax
Reclassifications	0	1
Foreign exchange
Currency translation adjustments, Pretax
Unrealized gains (losses)	71	71
Currency translation adjustments, Tax Benefit (Expense)
Unrealized gains (losses)	7	1
Currency translation adjustments, Net-of-tax
Unrealized gains (losses)	78	72
Net investment hedges
Currency translation adjustments, Pretax
Unrealized gains (losses)	(75)	(4)
Currency translation adjustments, Tax Benefit (Expense)
Unrealized gains (losses)	0	0
Currency translation adjustments, Net-of-tax
Unrealized gains (losses)	$ (75)	$ (4)

Equity (Accumulated Other Compr

Equity (Accumulated Other Comprehensive Income, Net Of Taxes) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	$ (585)	$ (762)
Other comprehensive income (loss) before reclassifications	(4)	59
Reclassifications from accumulated other comprehensive loss to net income	2
Other comprehensive income (loss)	(2)
Other comprehensive (income) loss attributable to redeemable noncontrolling interests		(1)
Ending balance	(613)	(704)
Accounting Standards Update 2016-01
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Reclassifications from accumulated other comprehensive loss to net income	(26)
Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(615)	(797)
Other comprehensive income (loss) before reclassifications	3	68
Reclassifications from accumulated other comprehensive loss to net income	0
Other comprehensive income (loss)	3
Other comprehensive (income) loss attributable to redeemable noncontrolling interests		(1)
Ending balance	(612)	(730)
Currency Translation | Accounting Standards Update 2016-01
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Reclassifications from accumulated other comprehensive loss to net income	0
AFS
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	26	11
Other comprehensive income (loss) before reclassifications	0	(1)
Reclassifications from accumulated other comprehensive loss to net income	0
Other comprehensive income (loss)	0
Other comprehensive (income) loss attributable to redeemable noncontrolling interests		0
Ending balance	0	10
AFS | Accounting Standards Update 2016-01
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Reclassifications from accumulated other comprehensive loss to net income	(26)
Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	4	24
Other comprehensive income (loss) before reclassifications	(7)	(8)
Reclassifications from accumulated other comprehensive loss to net income	2
Other comprehensive income (loss)	(5)
Other comprehensive (income) loss attributable to redeemable noncontrolling interests		0
Ending balance	(1)	$ 16
Derivatives | Accounting Standards Update 2016-01
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Reclassifications from accumulated other comprehensive loss to net income	$ 0

Noncontrolling Interest (Detail

Noncontrolling Interest (Details) - The Tribune Company - The Food Network and Cooking Channel	Mar. 06, 2018
Noncontrolling Interest [Line Items]
Voting interests percentage by parent	80.00%
Ownership percentage by parent	68.70%

Revenues - Revenue Recognition

Revenues - Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Segments | U.S. Networks
Disaggregation of Revenue [Line Items]
Revenues	$ 1,174	$ 829
Operating Segments | U.S. Networks | Distribution
Disaggregation of Revenue [Line Items]
Revenues	514	408
Operating Segments | U.S. Networks | Advertising
Disaggregation of Revenue [Line Items]
Revenues	627	405
Operating Segments | U.S. Networks | Other
Disaggregation of Revenue [Line Items]
Revenues	33	16
Operating Segments | International Networks
Disaggregation of Revenue [Line Items]
Revenues	1,098	747
Operating Segments | International Networks | Distribution
Disaggregation of Revenue [Line Items]
Revenues	537	447
Operating Segments | International Networks | Advertising
Disaggregation of Revenue [Line Items]
Revenues	385	282
Operating Segments | International Networks | Other
Disaggregation of Revenue [Line Items]
Revenues	176	18
Operating Segments | Education and Other
Disaggregation of Revenue [Line Items]
Revenues	35	37
Operating Segments | Education and Other | Distribution
Disaggregation of Revenue [Line Items]
Revenues	0	0
Operating Segments | Education and Other | Advertising
Disaggregation of Revenue [Line Items]
Revenues	0	0
Operating Segments | Education and Other | Other
Disaggregation of Revenue [Line Items]
Revenues	35	37
Corporate and inter-segment eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corporate and inter-segment eliminations | Distribution
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corporate and inter-segment eliminations | Advertising
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corporate and inter-segment eliminations | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0

Revenues - Transaction Price Al

Revenues - Transaction Price Allocated to Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Distribution
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 2,100
Remaining performance obligations, expected timing of satisfaction, period	10 years
Content Licensing Contracts
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 559
Remaining performance obligations, expected timing of satisfaction, period	5 years
Brand Licensing Contracts
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 114
Remaining performance obligations, expected timing of satisfaction, period	5 years

Revenues - Contract Balances (D

Revenues - Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounts receivable
December 31, 2017	$ 1,838	$ 1,495
Additions	2,981	1,613
Reductions	(2,163)	(1,563)
Foreign Currency	(2)	15
March 31, 2018	2,654	1,560
Deferred revenues
December 31, 2017	363	285
Additions	357	191
Reductions	(303)	(218)
Foreign Currency	(6)	30
March 31, 2018	$ 411	$ 288

Share-based Payments (Equity-Ba

Share-based Payments (Equity-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 15	$ 21
Tax benefit recognized	3	8
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	2	9
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	7	6
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	5	3
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 1	$ 3

Share-based Payments (Liability

Share-based Payments (Liability Classified) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Current portion of liability-classified awards	$ 18	$ 12
Total liability-classified share-based compensation award liability	29	47
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Current portion of liability-classified awards	16	12
Non-current portion of liability-classified awards	9	32
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Current portion of liability-classified awards	2	0
Non-current portion of liability-classified awards	$ 2	$ 3

Share-based Payments (Awards Gr

Share-based Payments (Awards Granted and Converted During Period) (Details) - $ / shares shares in Millions	Mar. 06, 2018	Mar. 31, 2018
Scripps Networks Interactive
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted, Awards (in shares)	2
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted, Awards (in shares)		0.6
Awards converted or settled, Awards (in shares)		1.1
Awards granted, Weighted-Average Grant Price (in dollars per share)		$ 24.06
Awards converted or settled, Weighted-Average Grant Price (in dollars per share)		$ 40.23
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted, Awards (in shares)		6.3
Awards converted or settled, Awards (in shares)		1.2
Awards granted, Weighted-Average Grant Price (in dollars per share)		$ 11.58
Awards converted or settled, Weighted-Average Grant Price (in dollars per share)		$ 26.75
RSUs | Scripps Networks Interactive
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted, Awards (in shares)		3.4
Awards granted, Weighted-Average Grant Price (in dollars per share)		$ 1
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted, Awards (in shares)		3.7
Awards converted or settled, Awards (in shares)		0
Awards granted, Weighted-Average Grant Price (in dollars per share)		$ 22.37
Awards converted or settled, Weighted-Average Grant Price (in dollars per share)		$ 0

Share-based Payments (Stock Opt

Share-based Payments (Stock Options Rollforward) (Details) - $ / shares shares in Millions	Mar. 06, 2018	Mar. 31, 2018	Dec. 31, 2017
Stock options
Stock Options
Options outstanding as of the beginning of the period (in shares)		12.3
Granted (in shares)		4.2
Options exercised (in shares)		(2.5)
Forfeited/cancelled (in shares)		(0.2)
Options outstanding as of the end of the period (in shares)		13.8
Weighted-Average Exercise Price
Outstanding as of beginning of the period (in dollars per share)			$ 27.46
Granted (in dollars per share)		$ 21.11
Exercised (in dollars per share)		16.21
Forfeited/cancelled (in dollars per share)		$ 30.97
Scripps Networks Interactive
Weighted-Average Exercise Price
Awards granted, Awards (in shares)	2

Share-based Payments (Unrecogni

Share-based Payments (Unrecognized Compensation Cost) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 192
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 104
Weighted-Average Amortization Period (years)	2 years 3 months 22 days
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 28
Weighted-Average Amortization Period (years)	1 year 8 months 27 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 45
Weighted-Average Amortization Period (years)	2 years 6 months
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost	$ 15
Weighted-Average Amortization Period (years)	1 year 9 months 26 days

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($)	1 Months Ended
	Mar. 31, 2018	Mar. 06, 2018
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan		$ 36,000,000
Benefit obligation		96,000,000
Fair value of plan assets		60,000,000
Contributions by employer	$ 0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0
Expected future employer contributions, next fiscal year	3,000,000
SERP
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan		62,000,000
Benefit obligation		$ 62,000,000
Expected future benefit payment, next twelve months	$ 35,000,000

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of the Net Periodic Pension Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 0.3
Expected return on plan assets, net of expenses	(0.4)
Net periodic pension cost	(0.1)
SERP
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.1
Expected return on plan assets, net of expenses	0
Net periodic pension cost	$ 0.1

Employee Benefit Plans - Assump

Employee Benefit Plans - Assumptions Used in Determining Pension Plan and SERP Expense (Details)	3 Months Ended
	Mar. 31, 2018
Minimum
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets, historical compound return on plan assets, period	10 years
Maximum
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets, historical compound return on plan assets, period	15 years
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.70%
Long-term rate of return on plan assets	7.50%
Rate of compensation increases	3.56%
SERP
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.41%
Rate of compensation increases	3.21%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (20)		$ 55
Effective income tax rate	(118.00%)		(20.00%)
Federal statutory income tax rate	(21.00%)		(35.00%)
Tax Cuts and Jobs Act of 2017, provisional income tax benefit		$ 44
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 379	189
Unrecognized tax benefits, interest and penalties payable	53	$ 21
Scenario, Forecast
Income Tax Contingency [Line Items]
Unrecognized tax benefits, decreases resulting from current period tax positions				$ 69
Scripps Networks Interactive
Income Tax Contingency [Line Items]
Unrecognized tax benefits	188
Unrecognized tax benefits, interest and penalties payable	$ 32

Income Taxes (Schedule Of Incom

Income Taxes (Schedule Of Income Tax Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. federal statutory income tax provision	$ 4	$ (96)
State and local income taxes, net of federal tax benefit	7	(4)
Effect of foreign operations	(4)	15
Domestic production activity deductions	0	8
Change in uncertain tax positions	0	0
Renewable energy investments tax credits (See Note 3)	0	25
U.S. legislative changes	19	0
Other, net	(6)	(3)
Income tax benefit (expense)	$ 20	$ (55)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax provision	21.00%	35.00%
State and local income taxes, net of federal tax benefit	44.00%	2.00%
Effect of foreign operations	(21.00%)	(6.00%)
Domestic production activity deductions	0.00%	(3.00%)
Change in uncertain tax positions	(2.00%)	(0.00%)
Renewable energy investments tax credits (See Note 3)	(1.00%)	(9.00%)
U.S. legislative changes	109.00%	(0.00%)
Other, net	(32.00%)	1.00%
Income tax benefit (expense)	118.00%	20.00%

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Aug. 07, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Securities excluded from computation of earnings per share (in shares)	2,000,000
Series C-1 Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income available to Discovery, Inc. stockholders for diluted net (loss) income per share	$ (1)	$ 45
Advance Programming Holdings, LLC | Series C Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common stock, conversion basis (in shares)			2
Advance Programming Holdings, LLC | Series C-1 Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common stock, conversion basis (in shares)			19.3648

Earnings Per Share (Reconciliat

Earnings Per Share (Reconciliation Of Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 3	$ 221
Net income attributable to noncontrolling interests	(5)	0
Net income attributable to redeemable noncontrolling interests	(6)	(6)
Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share	(7)	189
Series A-1 Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Allocation of undistributed loss (income) to Series A-1 convertible preferred stock	1	(26)
Allocation of undistributed (loss) income to Series A-1 convertible preferred stockholders	(1)	26
Series A, B and C Common Stock and C1 Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share	(7)	189
Series A, B and C Common Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share	(6)	143
Net (loss) income allocated to Discovery, Inc. Series A, B and C common stockholders for diluted net income per share	(8)	215
Series C-1 Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income allocated to Discovery, Inc. Series A, B and C common and Series C-1 convertible preferred stockholders for basic net (loss) income per share	(1)	46
Net (loss) income allocated to Discovery, Inc. Series A, B and C common stockholders for diluted net income per share	$ (1)	$ 45

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Weighted-Average Number of Shares Outstanding) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Series A, B and C Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares outstanding, basic (in shares)	422	389
Impact of assumed preferred stock conversion (in shares)	187	195
Dilutive effect of share-based awards (in shares)	0	4
Weighted average number of shares outstanding, diluted (in shares)	609	588
Series C-1 Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares outstanding, basic and diluted (in shares)	6	6

Earnings Per Share (Schedule106

Earnings Per Share (Schedule of Basic and Dilutive Earnings per Share) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Series A, B and C Common Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income per share, basic (in dollars per share)	$ (0.01)	$ 0.37
Net (loss) income per share, diluted (in dollars per share)	(0.01)	0.37
Series C-1 Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income per share, basic (in dollars per share)	(0.25)
Net (loss) income per share, diluted (in dollars per share)	$ (0.25)	$ 7.06

Earnings Per Share (Schedule107

Earnings Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share (in shares)	2
Anti-dilutive share based awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share (in shares)	16	9
PRSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share (in shares)	2	1

Supplemental Disclosures (Sched

Supplemental Disclosures (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Disclosure Text Block Supplement [Abstract]
Accrued payroll and related benefits	$ 624	$ 535
Content rights payable	370	219
Accrued interest	140	148
Accrued income taxes	39	45
Current portion of share-based compensation liabilities	18	12
Other accrued liabilities	539	350
Total accrued liabilities	$ 1,730	$ 1,309

Supplemental Disclosures (Sc109

Supplemental Disclosures (Schedule of Other Expense, net) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disclosure Text Block Supplement [Abstract]
Foreign currency losses, net	$ (4)	$ (9)
Gain (loss) on derivative instruments, net	5	(3)
Change in the value of common stock equity with readily determinable fair value	(38)	0
Interest income	15	0
Other expense, net	0	(1)
Total other expense, net	$ (22)	$ (13)

Supplemental Disclosures (Sc110

Supplemental Disclosures (Schedule of Share-based Payment Awards) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Tax settlements associated with share-based plans	$ (16)	$ (30)
Proceeds from issuance of common stock in connection with share-based plans	23	(8)
Proceeds from issuance of common stock in connection with share-based plans	$ 39	$ 22

Supplemental Disclosures (Sc111

Supplemental Disclosures (Schedule of Supplemental Cash Flow Information) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash paid for taxes, net	$ 44	$ 43
Cash paid for interest, net	$ 199	$ 66
Non-cash investing and financing activities:
Equity issued for the acquisition of Scripps Networks	3,218	0
Accrued purchases of property and equipment	$ 13	$ 21
Assets acquired under capital lease arrangements	$ 24	$ 29

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - Board of Directors Chairman	Mar. 31, 2018
Liberty Global
Related Party Transaction [Line Items]
Aggregate voting power percentage of a related party	27.00%
Liberty Broadband
Related Party Transaction [Line Items]
Aggregate voting power percentage of a related party	46.00%

Related Party Transactions (Sch

Related Party Transactions (Schedule of Related Party Transactions, Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Related Party Transaction [Line Items]
Total revenues and service charges	$ 193	$ 173
Expenses	(55)	(30)
Liberty Group
Related Party Transaction [Line Items]
Total revenues and service charges	145	126
Equity method investees
Related Party Transaction [Line Items]
Total revenues and service charges	38	34
Interest income	0	4
Other
Related Party Transaction [Line Items]
Total revenues and service charges	$ 10	$ 13

Related Party Transactions (114

Related Party Transactions (Schedule of Related Party Transactions, Receivables) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Receivables	$ 131	$ 105
Note receivable	$ 103	$ 0

Commitments, Contingencies, 115

Commitments, Contingencies, and Guarantees - Commitments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Operating Leases
Amounts representing interest	$ (38)
Total minimum payments, net	5,742
Capital Leases
Total minimum payments, net	5,742
Content
Amounts representing interest	(38)
Total minimum payments, net	5,742
Other
Amounts representing interest	(38)
Total minimum payments, net	5,742
Total
2,018	1,659
2,019	1,107
2,020	1,072
2,021	505
2,022	432
Thereafter	1,005
Total minimum payments	5,780
Amounts representing interest	(38)
Total minimum payments, net	5,742
Operating Leases
Operating Leases
2,018	69
2,019	78
2,020	60
2,021	48
2,022	17
Thereafter	37
Total minimum payments	309
Amounts representing interest	0
Total minimum payments, net	309
Capital Leases
Total minimum payments, net	309
Content
Amounts representing interest	0
Total minimum payments, net	309
Other
Amounts representing interest	0
Total minimum payments, net	309
Total
Amounts representing interest	0
Total minimum payments, net	309
Capital Leases
Operating Leases
Total minimum payments, net	244
Capital Leases
2,018	42
2,019	40
2,020	37
2,021	33
2,022	26
Thereafter	104
Total minimum payments	282
Amounts representing interest	(38)
Total minimum payments, net	244
Content
Total minimum payments, net	244
Other
Total minimum payments, net	244
Total
Total minimum payments, net	244
Content
Operating Leases
Amounts representing interest	0
Total minimum payments, net	4,055
Capital Leases
Total minimum payments, net	4,055
Content
2,018	1,187
2,019	641
2,020	764
2,021	342
2,022	350
Thereafter	771
Total minimum payments	4,055
Amounts representing interest	0
Total minimum payments, net	4,055
Other
Amounts representing interest	0
Total minimum payments, net	4,055
Total
Amounts representing interest	0
Total minimum payments, net	4,055
Other
Operating Leases
Amounts representing interest	0
Total minimum payments, net	1,134
Capital Leases
Total minimum payments, net	1,134
Content
Amounts representing interest	0
Total minimum payments, net	1,134
Other
2,018	361
2,019	348
2,020	211
2,021	82
2,022	39
Thereafter	93
Total minimum payments	1,134
Amounts representing interest	0
Total minimum payments, net	1,134
Total
Amounts representing interest	0
Total minimum payments, net	$ 1,134
Other | Minimum
Total
Contract termination notice, period without penalty	30 days
Other | Maximum
Total
Contract termination notice, period without penalty	60 days

Commitments, Contingencies, 116

Commitments, Contingencies, and Guarantees - Contingencies (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Sep. 25, 2017	Mar. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Redeemable noncontrolling interest balance	$ 419,000,000	$ 413,000,000		$ 249,000,000	$ 243,000,000
Guarantor obligations, current carrying value	0	0
Material amounts for indemnifications or other contingencies	0	$ 0
OWN
Other Commitments [Line Items]
Redeemable noncontrolling interest balance	56,000,000
VTEN
Other Commitments [Line Items]
Redeemable noncontrolling interest balance	120,000,000		$ 120,000,000
Discovery Family
Other Commitments [Line Items]
Redeemable noncontrolling interest balance	215,000,000
Discovery Japan
Other Commitments [Line Items]
Redeemable noncontrolling interest balance	$ 28,000,000

Reportable Segments (Schedule o

Reportable Segments (Schedule of Revenues by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 2,307	$ 1,613
U.S. Networks
Segment Reporting Information [Line Items]
Total revenues	1,174	829
International Networks
Segment Reporting Information [Line Items]
Total revenues	1,098	747
Education and Other
Segment Reporting Information [Line Items]
Total revenues	$ 35	$ 37

Reportable Segments (Schedul118

Reportable Segments (Schedule of Adjusted OIBDA by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total Adjusted OIBDA	$ 697	$ 603
Operating Segments | U.S. Networks
Segment Reporting Information [Line Items]
Total Adjusted OIBDA	652	501
Operating Segments | International Networks
Segment Reporting Information [Line Items]
Total Adjusted OIBDA	137	194
Operating Segments | Education and Other
Segment Reporting Information [Line Items]
Total Adjusted OIBDA	3	(6)
Corporate and inter-segment eliminations
Segment Reporting Information [Line Items]
Total Adjusted OIBDA	$ (95)	$ (86)

Reportable Segments (Schedul119

Reportable Segments (Schedule of Reconciliation of Adjusted OIBDA to Net Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting [Abstract]
Net (loss) income available to Discovery, Inc.	$ (8)	$ 215
Net income attributable to noncontrolling interests	5	0
Net income attributable to redeemable noncontrolling interests	6	6
Income tax (benefit) expense	(20)	55
(Loss) income before income taxes	(17)	276
Other expense, net	22	13
Loss from equity investees, net	22	53
Loss on extinguishment of debt	0	54
Interest expense	177	91
Operating income	204	487
Restructuring and other charges	241	24
Depreciation and amortization	193	80
Mark-to-market share-based compensation	3	12
Scripps Networks transaction and integration costs	56	0
Total Adjusted OIBDA	$ 697	$ 603

Reportable Segments (Schedul120

Reportable Segments (Schedule of Total Assets by Segment) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 34,658	$ 22,555
Corporate Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total assets	6,773	12,847
Operating Segments | U.S. Networks
Segment Reporting Information [Line Items]
Total assets	19,756	4,127
Operating Segments | International Networks
Segment Reporting Information [Line Items]
Total assets	7,756	5,187
Operating Segments | Education and Other
Segment Reporting Information [Line Items]
Total assets	373	394
Corporate and inter-segment eliminations
Segment Reporting Information [Line Items]
Total assets	$ (7,959)	$ (19,327)

Reportable Segments (Schedul121

Reportable Segments (Schedule of Content Rights Expense and Impairment) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total content rights expense and impairment	$ 751	$ 458	$ 458
Operating Segments | U.S. Networks
Segment Reporting Information [Line Items]
Total content rights expense and impairment	275		178
Operating Segments | International Networks
Segment Reporting Information [Line Items]
Total content rights expense and impairment	474		277
Operating Segments | Education and Other
Segment Reporting Information [Line Items]
Total content rights expense and impairment	1		2
Corporate and inter-segment eliminations
Segment Reporting Information [Line Items]
Total content rights expense and impairment	$ 1		$ 1

Reportable Segments (Schedul122

Reportable Segments (Schedule of Revenues by Geography) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ 2,307	$ 1,613	$ 1,613
U.S.
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	1,209		866
Non-U.S.
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ 1,098		$ 747

Reportable Segments (Schedul123

Reportable Segments (Schedule of Property and Equipment by Geography) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Total property and equipment, net	$ 928	$ 597
U.S.
Segment Reporting, Asset Reconciling Item [Line Items]
Total property and equipment, net	480	309
U.K.
Segment Reporting, Asset Reconciling Item [Line Items]
Total property and equipment, net	181	173
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total property and equipment, net	$ 267	$ 115

Restructuring and Other Char124

Restructuring and Other Charges Restructuring and Other Charges (By Reporting Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Restructuring and other charges	$ 241	$ 24
U.S. Networks
Segment Reporting Information [Line Items]
Restructuring and other charges	34	4
International Networks
Segment Reporting Information [Line Items]
Restructuring and other charges	100	17
Education and Other
Segment Reporting Information [Line Items]
Restructuring and other charges	0	1
Corporate and inter-segment eliminations
Segment Reporting Information [Line Items]
Restructuring and other charges	$ 107	$ 2

Restructuring and Other Char125

Restructuring and Other Charges Restructuring And Other Charges (Total) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 164	$ 24
Other charges	77	0
Total restructuring and other charges	$ 241	$ 24

Restructuring and Other Char126

Restructuring and Other Charges Restructuring and Other Charges (Liabilities) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Restructuring Reserve
December 31, 2017	$ 43
Net Accruals	157
Cash Paid	(23)
March 31, 2018	177
Equity awards exchanged for shares	41
Scripps Networks Interactive
Restructuring Reserve
Equity awards exchanged for shares	7
Contract Terminations
Restructuring Reserve
December 31, 2017	1
Net Accruals	21
Cash Paid	(1)
March 31, 2018	21
Employee Terminations
Restructuring Reserve
December 31, 2017	42
Net Accruals	136
Cash Paid	(22)
March 31, 2018	$ 156

Condensed Consolidating Fina127

Condensed Consolidating Financial Statements (Narrative) (Details) - USD ($) $ in Billions	Mar. 31, 2018	Mar. 06, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Direct ownership percentage in Discovery Communications Holding, LLC	33.30%
Indirect ownership percentage in Discovery Communications Holding, LLC	66.70%
Scripps Senior Notes | Senior Notes | Scripps Networks Interactive
Business Acquisition [Line Items]
Principal amount of liabilities assumed		$ 2.5

Condensed Consolidating Fina128

Condensed Consolidating Financial Statements (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 812	$ 7,309	$ 267	$ 300
Receivables, net	2,654	1,838
Content rights, net	419	410
Prepaid expenses and other current assets	636	434
Total current assets	4,521	9,991
Noncurrent content rights, net	3,323	2,213
Goodwill, net	13,102	7,073
Intangible assets, net	10,825	1,770
Equity method investments, including note receivable	1,231	335
Other noncurrent assets	728	576
Total assets	34,658	22,555
Current liabilities:
Current portion of debt	153	30
Total current liabilities	2,465	1,871
Noncurrent portion of debt	19,214	14,755
Other noncurrent liabilities	972	587
Total liabilities	24,645	17,532
Redeemable noncontrolling interests	419	413
Noncontrolling interests	1,705	0
Total equity	9,594	4,610
Total liabilities and equity	34,658	22,555
Reclassifications and Eliminations
Current assets:
Cash and cash equivalents	0	0	0	0
Receivables, net	0	0
Content rights, net	0	0
Prepaid expenses and other current assets	0	0
Inter-company trade receivables, net	(148)	(205)
Total current assets	(148)	(205)
Investment in and advances to subsidiaries	(7,791)	(19,102)
Noncurrent content rights, net	0	0
Goodwill, net	0	0
Intangible assets, net	0	0
Equity method investments, including note receivable	0	0
Other noncurrent assets	(20)	(20)
Total assets	(7,959)	(19,327)
Current liabilities:
Current portion of debt	0	0
Other current liabilities	0	0
Inter-company trade payables, net	(148)	(205)
Total current liabilities	(148)	(205)
Noncurrent portion of debt	0	0
Other noncurrent liabilities	(19)	(20)
Total liabilities	(167)	(225)
Redeemable noncontrolling interests	0	0
Equity attributable to Discovery, Inc.	(9,497)
Noncontrolling interests	1,705
Total equity	(7,792)	(19,102)
Total liabilities and equity	(7,959)	(19,327)
Discovery
Current assets:
Cash and cash equivalents	0	0	0	0
Receivables, net	0	0
Content rights, net	0	0
Prepaid expenses and other current assets	77	49
Inter-company trade receivables, net	0	0
Total current assets	77	49
Investment in and advances to subsidiaries	7,816	4,563
Noncurrent content rights, net	0	0
Goodwill, net	0	0
Intangible assets, net	0	0
Equity method investments, including note receivable	0	0
Other noncurrent assets	0	0
Total assets	7,893	4,612
Current liabilities:
Current portion of debt	0	0
Other current liabilities	0	0
Inter-company trade payables, net	0	0
Total current liabilities	0	0
Noncurrent portion of debt	0	0
Other noncurrent liabilities	4	2
Total liabilities	4	2
Redeemable noncontrolling interests	0	0
Noncontrolling interests	0
Total equity	7,889	4,610
Total liabilities and equity	7,893	4,612
DCH
Current assets:
Cash and cash equivalents	0	0	0	0
Receivables, net	0	0
Content rights, net	0	0
Prepaid expenses and other current assets	40	32
Inter-company trade receivables, net	0	0
Total current assets	40	32
Investment in and advances to subsidiaries	(4,119)	4,532
Noncurrent content rights, net	0	0
Goodwill, net	0	0
Intangible assets, net	0	0
Equity method investments, including note receivable	0	0
Other noncurrent assets	20	20
Total assets	(4,059)	4,584
Current liabilities:
Current portion of debt	0	0
Other current liabilities	0	0
Inter-company trade payables, net	0	0
Total current liabilities	0	0
Noncurrent portion of debt	0	0
Other noncurrent liabilities	0	0
Total liabilities	0	0
Redeemable noncontrolling interests	0	0
Equity attributable to Discovery, Inc.	(4,059)
Noncontrolling interests	0
Total equity	(4,059)	4,584
Total liabilities and equity	(4,059)	4,584
DCL
Current assets:
Cash and cash equivalents	367	6,800	18	20
Receivables, net	429	410
Content rights, net	3	4
Prepaid expenses and other current assets	203	204
Inter-company trade receivables, net	148	205
Total current assets	1,150	7,623
Investment in and advances to subsidiaries	6,800	6,951
Noncurrent content rights, net	673	672
Goodwill, net	3,677	3,677
Intangible assets, net	258	259
Equity method investments, including note receivable	24	25
Other noncurrent assets	394	364
Total assets	12,976	19,571
Current liabilities:
Current portion of debt	129	7
Other current liabilities	519	572
Inter-company trade payables, net	0	0
Total current liabilities	648	579
Noncurrent portion of debt	16,126	14,163
Other noncurrent liabilities	321	297
Total liabilities	17,095	15,039
Redeemable noncontrolling interests	0	0
Equity attributable to Discovery, Inc.	(4,119)
Noncontrolling interests	0
Total equity	(4,119)	4,532
Total liabilities and equity	12,976	19,571
Non-Guarantor Subsidiaries of DCL
Current assets:
Cash and cash equivalents	295	509	249	280
Receivables, net	1,404	1,428
Content rights, net	300	406
Prepaid expenses and other current assets	136	149
Inter-company trade receivables, net	0	0
Total current assets	2,135	2,492
Investment in and advances to subsidiaries	0	0
Noncurrent content rights, net	1,632	1,541
Goodwill, net	3,428	3,396
Intangible assets, net	1,479	1,511
Equity method investments, including note receivable	333	310
Other noncurrent assets	834	809
Total assets	9,841	10,059
Current liabilities:
Current portion of debt	21	23
Other current liabilities	1,239	1,269
Inter-company trade payables, net	148	205
Total current liabilities	1,408	1,497
Noncurrent portion of debt	607	592
Other noncurrent liabilities	607	606
Total liabilities	2,622	2,695
Redeemable noncontrolling interests	419	413
Equity attributable to Discovery, Inc.	6,800
Noncontrolling interests	0
Total equity	6,800	6,951
Total liabilities and equity	9,841	10,059
Other Non- Guarantor Subsidiaries of Discovery
Current assets:
Cash and cash equivalents	150	0	0	0
Receivables, net	821	0
Content rights, net	116	0
Prepaid expenses and other current assets	180	0
Inter-company trade receivables, net	0	0
Total current assets	1,267	0
Investment in and advances to subsidiaries	(2,706)	3,056
Noncurrent content rights, net	1,018	0
Goodwill, net	5,997	0
Intangible assets, net	9,088	0
Equity method investments, including note receivable	874	0
Other noncurrent assets	428	0
Total assets	15,966	3,056
Current liabilities:
Current portion of debt	3	0
Other current liabilities	554	0
Inter-company trade payables, net	0	0
Total current liabilities	557	0
Noncurrent portion of debt	2,481	0
Other noncurrent liabilities	2,053	21
Total liabilities	5,091	21
Redeemable noncontrolling interests	0	0
Equity attributable to Discovery, Inc.	10,875
Noncontrolling interests	0
Total equity	10,875	3,035
Total liabilities and equity	15,966	3,056
Discovery Communications Inc And Subsidiaries [Member]
Current assets:
Cash and cash equivalents	812	7,309	$ 267	$ 300
Receivables, net	2,654	1,838
Content rights, net	419	410
Prepaid expenses and other current assets	636	434
Inter-company trade receivables, net	0	0
Total current assets	4,521	9,991
Investment in and advances to subsidiaries	0	0
Noncurrent content rights, net	3,323	2,213
Goodwill, net	13,102	7,073
Intangible assets, net	10,825	1,770
Equity method investments, including note receivable	1,231	335
Other noncurrent assets	1,656	1,173
Total assets	34,658	22,555
Current liabilities:
Current portion of debt	153	30
Other current liabilities	2,312	1,841
Inter-company trade payables, net	0	0
Total current liabilities	2,465	1,871
Noncurrent portion of debt	19,214	14,755
Other noncurrent liabilities	2,966	906
Total liabilities	24,645	17,532
Redeemable noncontrolling interests	419	413
Equity attributable to Discovery, Inc.	7,889
Noncontrolling interests	1,705
Total equity	9,594	4,610
Total liabilities and equity	34,658	$ 22,555
Discovery Communications Inc [Member]
Current liabilities:
Equity attributable to Discovery, Inc.	$ 7,889

Condensed Consolidating Fina129

Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Revenues	$ 2,307	$ 1,613	$ 1,613
Costs of revenues, excluding depreciation and amortization	1,060	607
Selling, general and administrative	609	415
Depreciation and amortization	193	80
Restructuring and other charges	241	24
Total costs and expenses	2,103	1,126
Operating income	204	487
Interest expense	(177)	(91)
Loss on extinguishment of debt	0	(54)
(Loss) income from equity investees, net	(22)	(53)
Other (expense) income, net	(22)	(13)
(Loss) income before income taxes	(17)	276
Income tax benefit (expense)	20	(55)
Net income	3	221
Net income attributable to noncontrolling interests	(5)	0
Net income attributable to redeemable noncontrolling interests	(6)	(6)
Net (loss) income available to Discovery, Inc.	(8)	215
Reclassifications and Eliminations
Condensed Income Statements, Captions [Line Items]
Revenues	(3)	(3)
Costs of revenues, excluding depreciation and amortization	(5)	0
Selling, general and administrative	2	(3)
Depreciation and amortization	0	0
Restructuring and other charges	0	0
Total costs and expenses	(3)	(3)
Operating income	0	0
Equity in earnings of subsidiaries	(144)	(721)
Interest expense	0	0
Loss on extinguishment of debt		0
(Loss) income from equity investees, net	0	0
Other (expense) income, net	0	0
(Loss) income before income taxes	(144)	(721)
Income tax benefit (expense)	0	0
Net income	(144)	(721)
Net income attributable to noncontrolling interests	(5)
Net income attributable to redeemable noncontrolling interests	(6)	(6)
Net (loss) income available to Discovery, Inc.	(155)	(727)
Discovery
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs of revenues, excluding depreciation and amortization	0	0
Selling, general and administrative	26	4
Depreciation and amortization	0	0
Restructuring and other charges	8	0
Total costs and expenses	34	4
Operating income	(34)	(4)
Equity in earnings of subsidiaries	17	218
Interest expense	0	0
Loss on extinguishment of debt		0
(Loss) income from equity investees, net	0	0
Other (expense) income, net	0	0
(Loss) income before income taxes	(17)	214
Income tax benefit (expense)	8	1
Net income	(9)	215
Net income attributable to noncontrolling interests	0
Net income attributable to redeemable noncontrolling interests	0	0
Net (loss) income available to Discovery, Inc.	(9)	215
DCH
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs of revenues, excluding depreciation and amortization	0	0
Selling, general and administrative	0	0
Depreciation and amortization	0	0
Restructuring and other charges	0	0
Total costs and expenses	0	0
Operating income	0	0
Equity in earnings of subsidiaries	71	218
Interest expense	0	0
Loss on extinguishment of debt		0
(Loss) income from equity investees, net	0	0
Other (expense) income, net	0	0
(Loss) income before income taxes	71	218
Income tax benefit (expense)	0	0
Net income	71	218
Net income attributable to noncontrolling interests	0
Net income attributable to redeemable noncontrolling interests	0	0
Net (loss) income available to Discovery, Inc.	71	218
DCL
Condensed Income Statements, Captions [Line Items]
Revenues	488	491
Costs of revenues, excluding depreciation and amortization	107	108
Selling, general and administrative	80	74
Depreciation and amortization	17	12
Restructuring and other charges	43	16
Total costs and expenses	247	210
Operating income	241	281
Equity in earnings of subsidiaries	9	140
Interest expense	(157)	(86)
Loss on extinguishment of debt		(54)
(Loss) income from equity investees, net	0	1
Other (expense) income, net	(24)	(27)
(Loss) income before income taxes	69	255
Income tax benefit (expense)	2	(37)
Net income	71	218
Net income attributable to noncontrolling interests	0
Net income attributable to redeemable noncontrolling interests	0	0
Net (loss) income available to Discovery, Inc.	71	218
Non-Guarantor Subsidiaries of DCL
Condensed Income Statements, Captions [Line Items]
Revenues	1,549	1,125
Costs of revenues, excluding depreciation and amortization	866	499
Selling, general and administrative	436	340
Depreciation and amortization	93	68
Restructuring and other charges	98	8
Total costs and expenses	1,493	915
Operating income	56	210
Equity in earnings of subsidiaries	0	0
Interest expense	(12)	(5)
Loss on extinguishment of debt		0
(Loss) income from equity investees, net	(31)	(54)
Other (expense) income, net	4	14
(Loss) income before income taxes	17	165
Income tax benefit (expense)	(2)	(19)
Net income	15	146
Net income attributable to noncontrolling interests	0
Net income attributable to redeemable noncontrolling interests	0	0
Net (loss) income available to Discovery, Inc.	15	146
Other Non- Guarantor Subsidiaries of Discovery
Condensed Income Statements, Captions [Line Items]
Revenues	273	0
Costs of revenues, excluding depreciation and amortization	92	0
Selling, general and administrative	65	0
Depreciation and amortization	83	0
Restructuring and other charges	92	0
Total costs and expenses	332	0
Operating income	(59)	0
Equity in earnings of subsidiaries	47	145
Interest expense	(8)	0
Loss on extinguishment of debt		0
(Loss) income from equity investees, net	9	0
Other (expense) income, net	(2)	0
(Loss) income before income taxes	(13)	145
Income tax benefit (expense)	12	0
Net income	(1)	145
Net income attributable to noncontrolling interests	0
Net income attributable to redeemable noncontrolling interests	0	0
Net (loss) income available to Discovery, Inc.	(1)	145
Discovery Communications Inc And Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	2,307	1,613
Costs of revenues, excluding depreciation and amortization	1,060	607
Selling, general and administrative	609	415
Depreciation and amortization	193	80
Restructuring and other charges	241	24
Total costs and expenses	2,103	1,126
Operating income	204	487
Equity in earnings of subsidiaries	0	0
Interest expense	(177)	(91)
Loss on extinguishment of debt		(54)
(Loss) income from equity investees, net	(22)	(53)
Other (expense) income, net	(22)	(13)
(Loss) income before income taxes	(17)	276
Income tax benefit (expense)	20	(55)
Net income	3	221
Net income attributable to noncontrolling interests	(5)
Net income attributable to redeemable noncontrolling interests	(6)	(6)
Net (loss) income available to Discovery, Inc.	$ (8)	$ 215

Condensed Consolidating Fina130

Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Statement of Income Captions [Line Items]
Net income	$ 3	$ 221
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	3	68
Available-for-sale securities	0	(1)
Derivatives	(5)	(8)
Comprehensive income	1	280
Comprehensive income attributable to noncontrolling interests	(5)	0
Comprehensive income attributable to redeemable noncontrolling interests	(6)	(7)
Comprehensive (loss) income attributable to Discovery, Inc.	(10)	273
Reclassifications and Eliminations
Condensed Statement of Income Captions [Line Items]
Net income	(144)	(721)
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	(64)	(249)
Available-for-sale securities		4
Derivatives	18	30
Comprehensive income	(190)	(936)
Comprehensive income attributable to noncontrolling interests	(5)
Comprehensive income attributable to redeemable noncontrolling interests	3	(2)
Comprehensive (loss) income attributable to Discovery, Inc.	(192)	(938)
Discovery
Condensed Statement of Income Captions [Line Items]
Net income	(9)	215
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	3	68
Available-for-sale securities		(1)
Derivatives	(5)	(8)
Comprehensive income	(11)	274
Comprehensive income attributable to noncontrolling interests	0
Comprehensive income attributable to redeemable noncontrolling interests	(2)	(1)
Comprehensive (loss) income attributable to Discovery, Inc.	(13)	273
DCH
Condensed Statement of Income Captions [Line Items]
Net income	71	218
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	23	68
Available-for-sale securities		(1)
Derivatives	(5)	(8)
Comprehensive income	89	277
Comprehensive income attributable to noncontrolling interests	0
Comprehensive income attributable to redeemable noncontrolling interests	(2)	(1)
Comprehensive (loss) income attributable to Discovery, Inc.	87	276
DCL
Condensed Statement of Income Captions [Line Items]
Net income	71	218
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	23	68
Available-for-sale securities		(1)
Derivatives	(5)	(8)
Comprehensive income	89	277
Comprehensive income attributable to noncontrolling interests	0
Comprehensive income attributable to redeemable noncontrolling interests	(2)	(1)
Comprehensive (loss) income attributable to Discovery, Inc.	87	276
Non-Guarantor Subsidiaries of DCL
Condensed Statement of Income Captions [Line Items]
Net income	15	146
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	23	68
Available-for-sale securities		(1)
Derivatives	(5)	(9)
Comprehensive income	33	204
Comprehensive income attributable to noncontrolling interests	0
Comprehensive income attributable to redeemable noncontrolling interests	(2)	(1)
Comprehensive (loss) income attributable to Discovery, Inc.	31	203
Other Non- Guarantor Subsidiaries of Discovery
Condensed Statement of Income Captions [Line Items]
Net income	(1)	145
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	(5)	45
Available-for-sale securities		(1)
Derivatives	(3)	(5)
Comprehensive income	(9)	184
Comprehensive income attributable to noncontrolling interests	0
Comprehensive income attributable to redeemable noncontrolling interests	(1)	(1)
Comprehensive (loss) income attributable to Discovery, Inc.	(10)	183
Discovery Communications Inc And Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income	3	221
Other comprehensive income (loss) adjustments, net of tax:
Currency translation	3	68
Available-for-sale securities		(1)
Derivatives	(5)	(8)
Comprehensive income	1	280
Comprehensive income attributable to noncontrolling interests	(5)
Comprehensive income attributable to redeemable noncontrolling interests	(6)	(7)
Comprehensive (loss) income attributable to Discovery, Inc.	$ (10)	$ 273

Condensed Consolidating Fina131

Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investing Activities
Business acquisitions, net of cash acquired	$ (8,565)	$ 0
Payments for (proceeds from) investments	(22)	(188)
Distributions from equity method investees	0	5
Purchases of property and equipment	(48)	(47)
(Payments for) proceeds from derivative instruments, net	(42)	5
Other investing activities, net	2	1
Financing Activities
Commercial paper borrowings, net	0	54
Borrowings under revolving credit facility	0	150
Borrowings under term loan agreements	2,000	0
Principal repayments of revolving credit facility	0	(125)
Borrowings from debt, net of discount and including premiums	0	659
Principal repayments of debt, including discount payment and premiums to par value	0	(650)
Principal repayments of capital lease obligations	(13)	(13)
Repurchases of stock	0	(200)
Cash settlement of common stock repurchase contracts		58
Distributions to noncontrolling interests	(2)	(3)
Share-based plan proceeds (payments), net	23	(8)
Other financing activities, net	(11)	(6)
Effect of exchange rate changes on cash and cash equivalents	(1)	20
Net change in cash and cash equivalents	(6,497)	(33)
Cash and cash equivalents, beginning of period	7,309	300
Cash and cash equivalents, end of period	812	267
Reclassifications and Eliminations
Operating Activities
Cash provided by (used in) operating activities	0	0
Investing Activities
Business acquisitions, net of cash acquired	0
Payments for (proceeds from) investments	0	0
Distributions from equity method investees		0
Purchases of property and equipment	0	0
(Payments for) proceeds from derivative instruments, net	0	0
Inter-company distributions		(2)
Other investing activities, net	0	0
Cash used in investing activities	0	(2)
Financing Activities
Commercial paper borrowings, net		0
Borrowings under revolving credit facility		0
Borrowings under term loan agreements	0
Principal repayments of revolving credit facility		0
Borrowings from debt, net of discount and including premiums		0
Principal repayments of debt, including discount payment and premiums to par value		0
Principal repayments of capital lease obligations	0	0
Repurchases of stock		0
Cash settlement of common stock repurchase contracts		0
Distributions to noncontrolling interests		0
Distributions to redeemable noncontrolling interests	0
Share-based plan proceeds (payments), net	0	0
Borrowing under program financing line of credit	0
Other financing activities, net	0	2
Cash provided by (used in) financing activities	0	2
Effect of exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Discovery
Operating Activities
Cash provided by (used in) operating activities	(54)	46
Investing Activities
Business acquisitions, net of cash acquired	(8,714)
Payments for (proceeds from) investments	0	0
Distributions from equity method investees		0
Purchases of property and equipment	0	0
(Payments for) proceeds from derivative instruments, net	0	0
Inter-company distributions		0
Other investing activities, net	0	0
Cash used in investing activities	(8,714)	0
Financing Activities
Commercial paper borrowings, net		0
Borrowings under revolving credit facility		0
Borrowings under term loan agreements	0
Principal repayments of revolving credit facility		0
Borrowings from debt, net of discount and including premiums		0
Principal repayments of debt, including discount payment and premiums to par value		0
Principal repayments of capital lease obligations	0	0
Repurchases of stock		(200)
Cash settlement of common stock repurchase contracts		58
Distributions to noncontrolling interests		0
Distributions to redeemable noncontrolling interests	0
Share-based plan proceeds (payments), net	23	(8)
Borrowing under program financing line of credit	0
Other financing activities, net	8,745	104
Cash provided by (used in) financing activities	8,768	(46)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
DCH
Operating Activities
Cash provided by (used in) operating activities	(8)	(2)
Investing Activities
Business acquisitions, net of cash acquired	0
Payments for (proceeds from) investments	0	0
Distributions from equity method investees		0
Purchases of property and equipment	0	0
(Payments for) proceeds from derivative instruments, net	0	0
Inter-company distributions		0
Other investing activities, net	0	0
Cash used in investing activities	0	0
Financing Activities
Commercial paper borrowings, net		0
Borrowings under revolving credit facility		0
Borrowings under term loan agreements	0
Principal repayments of revolving credit facility		0
Borrowings from debt, net of discount and including premiums		0
Principal repayments of debt, including discount payment and premiums to par value		0
Principal repayments of capital lease obligations	0	0
Repurchases of stock		0
Cash settlement of common stock repurchase contracts		0
Distributions to noncontrolling interests		0
Distributions to redeemable noncontrolling interests	0
Share-based plan proceeds (payments), net	0	0
Borrowing under program financing line of credit	0
Other financing activities, net	8	2
Cash provided by (used in) financing activities	8	2
Effect of exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
DCL
Operating Activities
Cash provided by (used in) operating activities	17	61
Investing Activities
Business acquisitions, net of cash acquired	0
Payments for (proceeds from) investments	0	1
Distributions from equity method investees		0
Purchases of property and equipment	(25)	(20)
(Payments for) proceeds from derivative instruments, net	0	0
Inter-company distributions		2
Other investing activities, net	0	0
Cash used in investing activities	(25)	(17)
Financing Activities
Commercial paper borrowings, net		54
Borrowings under revolving credit facility		150
Borrowings under term loan agreements	2,000
Principal repayments of revolving credit facility		(125)
Borrowings from debt, net of discount and including premiums		659
Principal repayments of debt, including discount payment and premiums to par value		(650)
Principal repayments of capital lease obligations	(2)	(2)
Repurchases of stock		0
Cash settlement of common stock repurchase contracts		0
Distributions to noncontrolling interests		0
Distributions to redeemable noncontrolling interests	0
Share-based plan proceeds (payments), net	0	0
Borrowing under program financing line of credit	22
Other financing activities, net	(8,445)	(132)
Cash provided by (used in) financing activities	(6,425)	(46)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents	(6,433)	(2)
Cash and cash equivalents, beginning of period	6,800	20
Cash and cash equivalents, end of period	367	18
Non-Guarantor Subsidiaries of DCL
Operating Activities
Cash provided by (used in) operating activities	210	150
Investing Activities
Business acquisitions, net of cash acquired	0
Payments for (proceeds from) investments	(28)	(189)
Distributions from equity method investees		5
Purchases of property and equipment	(23)	(27)
(Payments for) proceeds from derivative instruments, net	(42)	5
Inter-company distributions		0
Other investing activities, net	2	1
Cash used in investing activities	(91)	(205)
Financing Activities
Commercial paper borrowings, net		0
Borrowings under revolving credit facility		0
Borrowings under term loan agreements	0
Principal repayments of revolving credit facility		0
Borrowings from debt, net of discount and including premiums		0
Principal repayments of debt, including discount payment and premiums to par value		0
Principal repayments of capital lease obligations	(11)	(11)
Repurchases of stock		0
Cash settlement of common stock repurchase contracts		0
Distributions to noncontrolling interests		(3)
Distributions to redeemable noncontrolling interests	(2)
Share-based plan proceeds (payments), net	0	0
Borrowing under program financing line of credit	0
Other financing activities, net	(319)	18
Cash provided by (used in) financing activities	(332)	4
Effect of exchange rate changes on cash and cash equivalents	(1)	20
Net change in cash and cash equivalents	(214)	(31)
Cash and cash equivalents, beginning of period	509	280
Cash and cash equivalents, end of period	295	249
Other Non- Guarantor Subsidiaries of Discovery
Operating Activities
Cash provided by (used in) operating activities	(5)	0
Investing Activities
Business acquisitions, net of cash acquired	149
Payments for (proceeds from) investments	6	0
Distributions from equity method investees		0
Purchases of property and equipment	0	0
(Payments for) proceeds from derivative instruments, net	0	0
Inter-company distributions		0
Other investing activities, net	0	0
Cash used in investing activities	155	0
Financing Activities
Commercial paper borrowings, net		0
Borrowings under revolving credit facility		0
Borrowings under term loan agreements	0
Principal repayments of revolving credit facility		0
Borrowings from debt, net of discount and including premiums		0
Principal repayments of debt, including discount payment and premiums to par value		0
Principal repayments of capital lease obligations	0	0
Repurchases of stock		0
Cash settlement of common stock repurchase contracts		0
Distributions to noncontrolling interests		0
Distributions to redeemable noncontrolling interests	0
Share-based plan proceeds (payments), net	0	0
Borrowing under program financing line of credit	0
Other financing activities, net	0	0
Cash provided by (used in) financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents	150	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	150	0
Discovery Communications Inc And Subsidiaries [Member]
Operating Activities
Cash provided by (used in) operating activities	160	255
Investing Activities
Business acquisitions, net of cash acquired	(8,565)
Payments for (proceeds from) investments	(22)	(188)
Distributions from equity method investees		5
Purchases of property and equipment	(48)	(47)
(Payments for) proceeds from derivative instruments, net	(42)	5
Inter-company distributions		0
Other investing activities, net	2	1
Cash used in investing activities	(8,675)	(224)
Financing Activities
Commercial paper borrowings, net		54
Borrowings under revolving credit facility		150
Borrowings under term loan agreements	2,000
Principal repayments of revolving credit facility		(125)
Borrowings from debt, net of discount and including premiums		659
Principal repayments of debt, including discount payment and premiums to par value		(650)
Principal repayments of capital lease obligations	(13)	(13)
Repurchases of stock		(200)
Cash settlement of common stock repurchase contracts		58
Distributions to noncontrolling interests		(3)
Distributions to redeemable noncontrolling interests	(2)
Share-based plan proceeds (payments), net	23	(8)
Borrowing under program financing line of credit	22
Other financing activities, net	(11)	(6)
Cash provided by (used in) financing activities	2,019	(84)
Effect of exchange rate changes on cash and cash equivalents	(1)	20
Net change in cash and cash equivalents	(6,497)	(33)
Cash and cash equivalents, beginning of period	7,309	300
Cash and cash equivalents, end of period	$ 812	$ 267