LEASES - Lease costs (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
|
| Lessee, Lease, Description [Line Items] | ||
| Interest on lease liabilities | $ 1.6 | $ 2.1 |
| Total lease cost | 255.7 | 263.9 |
| Depreciation and amortization | ||
| Lessee, Lease, Description [Line Items] | ||
| Amortization of finance lease assets | 1.9 | 2.7 |
| Finance lease obligations | ||
| Lessee, Lease, Description [Line Items] | ||
| Interest on lease liabilities | 1.6 | 2.1 |
| Theatres | Rent | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating lease cost | 216.9 | 218.9 |
| Variable lease cost | 20.9 | 23.0 |
| Theatres | Operating expense | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating lease cost | 2.2 | 1.7 |
| Equipment | Operating expense | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating lease cost | 3.9 | 3.5 |
| Variable lease cost | 7.0 | 10.7 |
| Office And Other | General and administrative: other | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating lease cost | $ 1.3 | $ 1.3 |