CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Revenue	$ 1,413.3	$ 1,221.4	$ 1,442.5	$ 1,383.6	$ 1,416.8	$ 1,178.7	$ 1,202.3	$ 1,281.4	$ 5,460.8	$ 5,079.2	$ 3,235.9
Operating costs and expenses
Operating costs and expenses											1,089.5
Operating expenses, excluding depreciation and amortization below									1,654.7	1,548.0	873.5
Rent									797.8	794.4	505.5
General and administrative:
Merger, acquisition and transaction costs									31.3	63.0	47.9
Other, excluding depreciation and amortization below									179.3	133.2	90.0
Depreciation and amortization									537.8	538.6	268.2
Impairment of long-lived assets									13.8	43.6	5.5
Operating costs and expenses									5,195.8	4,977.2	3,022.3
Operating income (loss)	87.3	(21.9)	89.7	109.9	70.3	(4.1)	(19.5)	55.3	265.0	102.0	213.6
Other expense (income)
Other expense (income)									(108.1)	(1.5)	0.3
Interest expense:
Corporate borrowings									262.3	231.6	110.7
Capital and financing lease obligations									38.5	42.4	10.8
Non-cash NCM exhibitor services agreement									41.5
Equity in (earnings) loss of non-consolidated entities									(86.7)	185.2	(47.7)
Investment (income) expense									(6.2)	(22.6)	(10.2)
Total other expense									141.3	435.1	63.9
Earnings (loss) before income taxes									123.7	(333.1)	149.7
Income tax provision (benefit)									13.6	154.1	38.0
Net earnings (loss)	$ 170.6	$ (100.4)	$ 22.2	$ 17.7	$ (276.4)	$ (42.7)	$ (176.5)	$ 8.4	$ 110.1	$ (487.2)	$ 111.7
Earnings (loss) per share:
Basic	$ 1.65	$ (0.82)	$ 0.17	$ 0.14					$ 0.91	$ (3.80)	$ 1.13
Diluted	$ 0.43	$ (0.82)	$ 0.17	$ 0.14					$ 0.41	$ (3.80)	$ 1.13
Average shares outstanding:
Basic (in thousands)	103,514	123,126	128,039	128,046	129,265	131,077	131,166	121,358	120,621	128,246	98,838
Diluted (in thousands)	135,450	123,126	128,105	128,046	129,265	131,077	131,166	121,401	130,105	128,246	98,872
Admissions
Revenues
Revenue									$ 3,385.0	$ 3,229.5	$ 2,049.4
Operating costs and expenses
Operating costs and expenses									1,710.2	1,604.3	1,089.5
Food and beverage
Revenues
Revenue									1,671.5	1,548.4	1,019.1
Operating costs and expenses
Operating costs and expenses									270.9	252.1	142.2
Total other theatre
Revenues
Revenue									$ 404.3	$ 301.3	$ 167.4