星空传媒 Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Value Of Each Of The Major Classes Of Consolidated Depreciable Assets) (Details)

PROPERTY, PLANT AND EQUIPMENT (Value Of Each Of The Major Classes Of Consolidated Depreciable Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	$ 2,079.4	$ 1,941.3	听
Accumulated Depreciation and Depletion, Property, Plant and Equipment	1,028.4	956.9	听
Property, plant and equipment, net	1,051.0	984.4	$ 1,059.0
Land Rights And Mineral Rights [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	549.6	500.5	听
Office And Information Technology [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	66.3	65.1	听
Buildings [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	86.8	67.9	听
Mining Equipment [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	594.4	592.2	听
Processing Equipment [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	617.0	552.0	听
Electric Power Facilities [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	57.0	49.4	听
Land Improvements [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	23.7	23.5	听
Asset Retirement Obligation [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	19.2	19.8	听
Other Assets [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	30.3	28.1	听
Construction in Progress [Member]	听	听	听
Property, Plant and Equipment [Line Items]	听	听	听
Property, plant and equipment, gross	$ 35.1	$ 42.8	听