Business Acquisition and Equity Method Investment [Line Items]

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Business Acquisition, Notes Payable Issuable from Exchange Offer

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Business Acquisition, Per Share Value, Percentage

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Business Combination Dividend Distribution

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Business Combination Dividend Distribution, Change in Amount of Dividend Distribution

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The incremental financial impact from a business combination as a result of a transaction

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Business Combination Material Effects of Transaction after tax

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Business combination, recognized liabilities, net debt

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The incremental financial statement impact on equity method earnings as a result of a transaction.

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Other transaction details related to an equity method investment.

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Exchange Ratio used in calculation of Acquisition

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The date that the redeemable noncontrolling interest can be redeemed.

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The percentage of accretion of the redeemable noncontrolling interest.

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Number of shares of equity interests issued or issuable to acquire entity.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Total costs of sales and operating expenses for the period.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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The loss recognized on termination of a contract.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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Redemption value, as if currently redeemable, of redeemable noncontrolling interest classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Price of a single share of a number of saleable stocks of a company.

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Acquisitions - Additional Information (Detail) € / shares in Units, $ / shares in Units, shares in Millions, $ in Millions, € in Billions							1 Months Ended	3 Months Ended									12 Months Ended
	Oct. 05, 2018 USD ($) $ / shares shares	Oct. 03, 2018 USD ($)	Oct. 03, 2018 EUR (€) € / shares	Jun. 28, 2018 USD ($) $ / shares	Jun. 20, 2018 USD ($)	Sep. 25, 2017 USD ($)	Aug. 31, 2016 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Sep. 30, 2018 USD ($)	Oct. 03, 2015
Business Acquisition and Equity Method Investment [Line Items]
Redeemable noncontrolling interest								$ 1,124	$ 1,123				$ 1,148				$ 1,123	$ 1,148
Equity Method Investment, Other than Temporary Impairment																	210	0	$ 0
Equity Method Investment Non-cash Gain																	0	0	332
Goodwill								31,289	31,269				31,426				31,269	31,426	27,810	$ 31,269
Revenues								15,303	$ 14,307	$ 15,228	$ 14,548	$ 15,351	$ 12,779	$ 14,238	$ 13,336	$ 14,784	59,434	55,137	55,632
Costs and Expenses								$ 11,885				$ 11,558					$ 44,597	41,264	$ 41,274
A And E Television Networks Llc
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest									50.00%								50.00%		50.00%
BAMTech, LLC
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest								75.00%
Vice Media
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest								21.00%	11.00%								11.00%
Equity Method Investment, Other than Temporary Impairment																	$ 157	$ 0	$ 0
Payments to Acquire Equity Method Investments																			400
Equity Method Investment Non-cash Gain																			$ 332
Vice Media \| Equity Interest Held By A&E
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest									20.00%								20.00%		8.00%
Vice Media \| Retained Investment in Subsidiary \| Equity Interest Held By A&E
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Other Transaction Details																			49.90%
Hulu LLC
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest							30.00%	30.00%	30.00%								30.00%				33.00%
Equity Method Investment Non-cash Gain							$ 175
Guaranteed obligations							$ 400
Hulu LLC \| Equity Interest Held By Time Warner
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest							10.00%
Payments to Acquire Equity Method Investments							$ 600										$ 200
BAMTech, LLC
Business Acquisition and Equity Method Investment [Line Items]
Redeemable noncontrolling interest						$ 1,100
Equity Method Investment, Ownership Interest						42.00%			75.00%				42.00%		33.00%		75.00%	42.00%
Business Combination Material Effects of Transaction																	$ 255
Business Combination Material Effects of Transaction after tax																	162
Investment Owned, at Fair Value															$ 1,200
Payments to Acquire Equity Method Investments						$ 1,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						3,900
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value						$ 1,100
Effective ownership interest by noncontrolling owners						25.00%
Goodwill						$ 3,500
Revenues																	300
Costs and Expenses																	700
BAMTech, LLC \| MLB
Business Acquisition and Equity Method Investment [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value									$ 608								$ 608
BAMTech, LLC \| NHL
Business Acquisition and Equity Method Investment [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 500
BAMTech, LLC \| Equity Interest Held By Hearst Corporation
Business Acquisition and Equity Method Investment [Line Items]
Equity Method Investment, Ownership Interest									20.00%								20.00%
Minimum \| BAMTech, LLC \| MLB
Business Acquisition and Equity Method Investment [Line Items]
Preferred Stock Redemption Period						5 years
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 563
Preferred Stock Return on NCI, Accretion Percentage						8.00%
Minimum \| BAMTech, LLC \| NHL
Business Acquisition and Equity Method Investment [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 300
Maximum \| BAMTech, LLC \| MLB
Business Acquisition and Equity Method Investment [Line Items]
Preferred Stock Redemption Period						10 years
Maximum \| BAMTech, LLC \| NHL
Business Acquisition and Equity Method Investment [Line Items]
Redeemable Noncontrolling Interest, Equity, Redemption Value						$ 350
Pending Completion of Acquisition \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Per Share Value, Percentage				50.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net																				23,000
Business Combination Dividend Distribution, Change in Amount of Dividend Distribution					$ 2,000
Business combination, recognized liabilities, net debt																				$ 19,000
Loss on Contract Termination					2,500
Gain (Loss) on Contract Termination					1,500
Business Acquisition, Notes Payable Issuable from Exchange Offer	$ 18,100
Pending Completion of Acquisition \| Minimum \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Share Price \| $ / shares				$ 38.00
Business Combination Dividend Distribution					6,500
Pending Completion of Acquisition \| Maximum \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Share Price \| € / shares			€ 17.28
Proceeds from Sale of Equity Method Investments		$ 15,100	€ 11.6
Business Combination, Consideration Transferred				$ 35,700
Business Combination Dividend Distribution					$ 8,500
Scenario, Stock Price Greater than $114.32 \| Pending Completion of Acquisition \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Share Price \| $ / shares				$ 114.32
Exchange Ratio used in calculation of Acquisition \| $ / shares				0.3324
Scenario, Stock Price Less than $93.53 \| Pending Completion of Acquisition \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Share Price \| $ / shares				93.53
Exchange Ratio used in calculation of Acquisition \| $ / shares				0.4063
Scenario, Stock Price Greater than or equal to $93.53 and Less than or equal to $114.32 \| Pending Completion of Acquisition \| Minimum \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Share Price \| $ / shares				38.00
Share Price \| $ / shares				93.53
Scenario, Stock Price Greater than or equal to $93.53 and Less than or equal to $114.32 \| Pending Completion of Acquisition \| Maximum \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Share Price \| $ / shares				$ 114.32
Scenario, Plan \| Pending Completion of Acquisition \| 21CF
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Share Price \| $ / shares	$ 111.6013
Share Price \| $ / shares	$ 111.6013
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares	319
21CF \| 21CF agreement to sell Sky
Business Acquisition and Equity Method Investment [Line Items]
Business Acquisition, Share Price \| € / shares			€ 17.28
Proceeds from Sale of Equity Method Investments		$ 15,100	€ 11.6
Equity Method Investment, Other Transaction Details		39.00%	39.00%