Represents the amount of ADJUSTED earnings before interest, taxes, depreciation, and amortization.

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Represents the amount of ATTRIBUTED earnings before interest, taxes, depreciation, and amortization.

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The total fair value adjustment of derivative assets and liabilities.

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The fair value adjustment of a derivative asset.

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The fair value adjustment of a derivative liability.

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Represents the gain or loss on the write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt and call premiums paid in the market to tender for debt when the debt is not callable or pre-payable or call premiums resulting from measuring debt at fair value that were written-off to expense.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee in international theatre joint ventures.

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This element represents acquisition-related costs incurred to effect a business combination which have been expensed during the period. These costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs related to the requisition process for equity securities. In addition, this element includes other nonrecurring expenses that may include, but are not limited to, unconsummated business combination expenses, and other nonrecurring business transaction expenses.

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Net Periodic Benefit Cost (Credit), Total

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Amount of non-cash expense from operating leases.

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Amount of other income (expense) excluding merger costs.

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The aggregate amount of cash, equity-based employee remuneration.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee in non-theatre joint ventures.

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Amount of the fee that accompanies borrowing money under the debt instrument.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount of realized and unrealized loss of derivative instruments not designated or qualifying as hedging instruments.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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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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Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries or equity method investee.

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Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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No definition available.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the cost of borrowed funds accounted for as interest expense.

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-Subparagraph (SX 210.5-03(20))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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OPERATING SEGMENT - Reconciliation (Details) $ / shares in Units, kr in Millions, $ in Millions			3 Months Ended								12 Months Ended
	Dec. 29, 2017 USD ($)	Jun. 30, 2017 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 SEK (kr)	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 SEK (kr)	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)	Mar. 14, 2019 $ / shares	Jun. 18, 2018 $ / shares	Mar. 15, 2018 $ / shares
Reconciliation of net income to EBITDA
Net earnings (loss)			$ (13.5)	$ (54.8)	$ 49.4	$ (130.2)	$ 170.6	$ (100.4)	$ 22.2	$ 17.7		$ (149.1)		$ 110.1	$ (487.2)
Income tax provision (benefit)												(22.5)		13.6	154.1
Interest expense												340.8		342.3	274.0
Depreciation and amortization												450.0		537.8	538.6
Impairment of long-lived assets							$ 13.8					84.3		13.8	43.6
Certain operating expenses												14.8		24.0	20.6
Equity in (earnings) loss of non-consolidated entities												(30.6)		(86.7)	185.2
Cash distributions from non-consolidated entities												35.8		35.2	45.4
Attributable EBITDA												5.0		7.3	3.4
Investment income												16.0		6.2	22.6
Other expense (income)												13.3		(108.2)	(1.3)
Non-cash rent - purchase accounting												25.7
General and Administrative Expense [Abstract]
Merger, acquisition and other costs												15.5		31.3	63.0
Share-based Compensation Cash Portion												4.4		14.9	5.7
Adjusted EBITDA												771.4		929.2	822.5
Marked-to-market (gain) on derivative liability												(5.8)		(111.4)
Foreign currency transactions losses												(1.5)		(1.4)	3.0
Income (Loss) from Equity Method Investments												30.6		86.7	(185.2)
Investment expense (income)	$ 3.5	$ 204.5										3.6
Loss on derivative asset, increase of derivative liability												111.4
Loss on GBP forward contract												0.9		$ 0.4
Price per share (in dollars per share) \| $ / shares		$ 7.42					$ 6.86							$ 6.86
Third party fees on debt agreement							$ 1.3							$ 1.3
Loss on extinguishment of debt												16.6			0.5
Loss on repayment of indebtedness												16.6			0.4
Non operating net periodic benefit cost												1.2		0.8	0.2
Derivative asset fair value adjustment for contingent call option related to the Class B common stock purchase and cancellation agreement											kr (17.7)	17.7	kr 45.0	(45.0)
Derivative liability fair value adjustment for embedded conversion feature in the Convertible Notes due 2024											kr 23.5	23.5	kr 66.4	66.4
Bridge Loan Agreement due 2017
General and Administrative Expense [Abstract]
Loss on extinguishment of debt														0.4
2.95% Senior Unsecured Convertible Notes due 2024
General and Administrative Expense [Abstract]
Marked-to-market (gain) on derivative liability												$ 23.5		66.4
Price per share (in dollars per share) \| $ / shares			$ 7.24									$ 7.24
Attributable EBITDA
Reconciliation of net income to EBITDA
Income tax provision (benefit)												$ 0.4		0.4
Depreciation and amortization												3.4		2.6	1.6
Equity in (earnings) loss of non-consolidated entities												30.6		86.7	(185.2)
Equity in earnings (loss) non-theatre JV's												(29.2)		(81.9)	187.0
Equity in earnings (loss) International theatre JV's												1.4		4.8	1.8
Attributable EBITDA												(5.0)		(7.3)	(3.4)
Investment income												0.7		0.5
Other expense (income)												(0.5)
General and Administrative Expense [Abstract]
Income (Loss) from Equity Method Investments												(30.6)		(86.7)	185.2
International markets
General and Administrative Expense [Abstract]
Adjusted EBITDA												195.8		228.7	212.5
NCM
Reconciliation of net income to EBITDA
Equity in (earnings) loss of non-consolidated entities												(28.9)
General and Administrative Expense [Abstract]
Income (Loss) from Equity Method Investments												28.9
Investment expense (income)												16.0		208.0
Price per share (in dollars per share) \| $ / shares																$ 7.24	$ 7.30	$ 5.64
Gain (loss) on sale														28.9	(22.2)
Loss on disposition												1.1
Screenvision
Reconciliation of net income to EBITDA
Equity in (earnings) loss of non-consolidated entities												(30.1)
General and Administrative Expense [Abstract]
Income (Loss) from Equity Method Investments												30.1
Gain (loss) on sale												30.1
DCIP
Reconciliation of net income to EBITDA
Net earnings (loss)												25.4		29.1
Equity in (earnings) loss of non-consolidated entities												(25.4)		(29.1)	(28.6)
General and Administrative Expense [Abstract]
Income (Loss) from Equity Method Investments												$ 25.4		$ 29.1	$ 28.6