Business Acquisition and Equity Method Investment [Line Items]

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- Definition

Business Combination Dividend Distribution

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Business Combination Dividend Distribution, Change in Amount of Dividend Distribution

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- Definition

Business combination, recognized liabilities, net debt

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- Definition

Other transaction details related to an equity method investment.

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- Definition

Exchange Ratio used in calculation of Acquisition

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No definition available.

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- Definition

Preferred Stock Return on NCI Accretion Percent

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- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
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- Definition

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

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- Definition

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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No definition available.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

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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- Definition

Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

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- Definition

Total costs of sales and operating expenses for the period.

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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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- Definition

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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- Definition

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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- Definition

The loss recognized on termination of a contract.

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- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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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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Acquisitions - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended			6 Months Ended
	Dec. 14, 2017 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Apr. 01, 2017 USD ($)	Mar. 31, 2018 USD ($)	Apr. 01, 2017 USD ($)	Apr. 11, 2018 $ / shares	Dec. 14, 2017 € / shares	Dec. 14, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 25, 2017 USD ($)
Business Acquisition And Equity Method Investments
Goodwill		$ 31,350			$ 31,350					$ 31,426
Redeemable Noncontrolling Interest		1,150			1,150					$ 1,148
Costs and Expenses		10,511		$ 9,586	22,069	$ 20,664
BAMTech, LLC [Member]
Business Acquisition And Equity Method Investments
Goodwill											$ 3,500
Redeemable Noncontrolling Interest											1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net											$ 3,900
Equity Method Investment, Ownership Percentage				33.00%		33.00%				75.00%	42.00%
Revenue					200
Costs and Expenses					300
BAMTech, LLC [Member] \| NHL [Member]
Business Acquisition And Equity Method Investments
Redeemable Noncontrolling Interest, Equity, Redemption Value											$ 500
BAMTech, LLC [Member] \| MLB [Member]
Business Acquisition And Equity Method Investments
Redeemable Noncontrolling Interest, Equity, Redemption Value		$ 586			$ 586
BAMTech Notes Payable [Member] \| BAMTech, LLC [Member]
Business Acquisition And Equity Method Investments
Notes Payable, Current											1,600
Minimum \| NHL [Member] \| BAMTech, LLC [Member]
Business Acquisition And Equity Method Investments
Redeemable Noncontrolling Interest, Equity, Redemption Value											300
Minimum \| BAMTech, LLC [Member] \| MLB [Member]
Business Acquisition And Equity Method Investments
Redeemable Noncontrolling Interest, Equity, Redemption Value											$ 563
Preferred Stock on NCI Accretion Percentage											8.00%
Maximum \| NHL [Member] \| BAMTech, LLC [Member]
Business Acquisition And Equity Method Investments
Redeemable Noncontrolling Interest, Equity, Redemption Value											$ 350
Pending Approval [Member] \| 21CF [Member]
Business Acquisition And Equity Method Investments
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned									$ 51,600
Exchange Ratio used in calculation of Acquisition \| $ / shares	$ 0.2745
Business Combination Dividend Distribution, Change in Amount of Dividend Distribution	$ 2,000
Business combination, recognized liabilities, net debt			$ 14,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			19,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			5,200
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares	512
Loss on Contract Termination			2,500
Gain (Loss) on Contract Termination			$ 1,500
Pending Approval [Member] \| Minimum \| 21CF [Member]
Business Acquisition And Equity Method Investments
Business Combination Dividend Distribution	$ 6,500
Pending Approval [Member] \| Maximum \| 21CF [Member]
Business Acquisition And Equity Method Investments
Business Combination Dividend Distribution	$ 8,500
Pending 21CF acquisition of Sky [Member]
Business Acquisition And Equity Method Investments
Business Acquisition, Share Price \| € / shares								€ 10.75
Equity Method Investment, Other Transaction Details	39.00%
Subsequent Event [Member] \| Pending Approval [Member] \| 21CF [Member]
Business Acquisition And Equity Method Investments
Business Acquisition, Share Price \| $ / shares							$ 100.80