Fair Value Measurements (Schedule Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock	$ 120	$ 164
Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits	0	1,305
Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	24	9
Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	27	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	3	12
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 | 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 | 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	2	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 | 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	99	98
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	410	4,383
Liabilities	367	320
Fair Value, Measurements, Recurring | Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		1,305
Trading securities		2,707
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	40	182
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	8
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	16	7
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 | Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	199
Common stock	120	82
Common stock - pledged		82
Fair Value, Measurements, Recurring | Other noncurrent assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	16
Fair Value, Measurements, Recurring | Other noncurrent assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2
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	9	3
Fair Value, Measurements, Recurring | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		13
Fair Value, Measurements, Recurring | Accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	41	182
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 | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	3	12
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 | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	19	13
Fair Value, Measurements, Recurring | Other noncurrent liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	202
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	2	6
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 | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	99	98
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	359	3,053
Liabilities	243	182
Fair Value, Measurements, Recurring | Level 1 | Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		0
Trading securities		2,707
Fair Value, Measurements, Recurring | Level 1 | Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	40	182
Fair Value, Measurements, Recurring | Level 1 | Prepaid expenses and other current assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 1 | 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	0	0
Fair Value, Measurements, Recurring | Level 1 | 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		0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	199
Common stock	120	82
Common stock - pledged		82
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 1 | 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	0	0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Level 1 | Accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	41	182
Fair Value, Measurements, Recurring | Level 1 | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Level 1 | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Level 1 | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	202
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent liabilities | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Level 1 | 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		0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	51	1,330
Liabilities	124	138
Fair Value, Measurements, Recurring | Level 2 | Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		1,305
Trading securities		0
Fair Value, Measurements, Recurring | Level 2 | Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring | Level 2 | Prepaid expenses and other current assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	8
Fair Value, Measurements, Recurring | Level 2 | 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	16	7
Fair Value, Measurements, Recurring | Level 2 | 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 | Level 2 | Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Common stock	0	0
Common stock - pledged		0
Fair Value, Measurements, Recurring | Level 2 | Other noncurrent assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	16
Fair Value, Measurements, Recurring | Level 2 | Other noncurrent assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2
Fair Value, Measurements, Recurring | Level 2 | 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	9	3
Fair Value, Measurements, Recurring | Level 2 | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		13
Fair Value, Measurements, Recurring | Level 2 | Accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0	0
Fair Value, Measurements, Recurring | Level 2 | 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 | Level 2 | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	3	12
Fair Value, Measurements, Recurring | Level 2 | 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 | Level 2 | 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 | Level 2 | Other noncurrent liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0
Fair Value, Measurements, Recurring | Level 2 | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	2	6
Fair Value, Measurements, Recurring | Level 2 | 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 | Level 2 | 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	99	98
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 | Level 3 | Cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits		0
Trading securities		0
Fair Value, Measurements, Recurring | Level 3 | Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring | Level 3 | Prepaid expenses and other current assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 3 | 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	0	0
Fair Value, Measurements, Recurring | Level 3 | 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		0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Common stock	0	0
Common stock - pledged		0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent assets | Not Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent assets | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring | Level 3 | 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	0	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent assets | Fair Value Hedging | Designated as Hedging Instrument | Equity Contract | Lionsgate Collar
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0
Fair Value, Measurements, Recurring | Level 3 | Accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0	0
Fair Value, Measurements, Recurring | Level 3 | Accrued liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Level 3 | Accrued liabilities | Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 3 | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Level 3 | Accrued liabilities | Net investment hedges | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation plan	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent liabilities | Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent liabilities | Not Designated as Hedging Instrument | Cross-currency swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 0	0
Fair Value, Measurements, Recurring | Level 3 | Other noncurrent liabilities | Not Designated as Hedging Instrument | Credit contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		0
Fair Value, Measurements, Recurring | Level 3 | 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		$ 0