GEOGRAPHIC AREA AND SERVICES INFORMATION - Summary of Consolidated Revenues and Long-lived Assets by Geographic Region (Detail) - USD ($) $ 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 and Long-Lived Assets [Line Items]
Revenues	$ 852.7	$ 854.9	$ 883.3	$ 895.0	$ 887.8	$ 882.8	$ 917.7	$ 892.4	$ 3,485.9	$ 3,580.7	$ 3,562.3
Long-Lived Assets	5,603.4				6,136.5				5,603.4	6,136.5	6,176.9
United States
Revenues and Long-Lived Assets [Line Items]
Revenues									2,673.6	2,716.9	2,657.4
Long-Lived Assets	4,501.1				4,821.6				4,501.1	4,821.6	4,820.5
Europe
Revenues and Long-Lived Assets [Line Items]
Revenues									415.5	436.2	486.0
Long-Lived Assets	612.7				711.8				612.7	711.8	668.7
Other International Countries
Revenues and Long-Lived Assets [Line Items]
Revenues									396.8	427.6	418.9
Long-Lived Assets	489.6				603.1				489.6	603.1	687.7
International
Revenues and Long-Lived Assets [Line Items]
Revenues									812.3	863.8	904.9
Long-Lived Assets	$ 1,102.3				$ 1,314.9				$ 1,102.3	$ 1,314.9	$ 1,356.4