BUSINESS SEGMENTS (Summary of Geographic Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,923.7	$ 1,953.6	$ 1,889.6	$ 1,813.4	$ 2,131.9	$ 1,785.5	$ 1,780.9	$ 1,741.8	$ 7,580.3	$ 7,440.1	$ 6,663.9
Long-Lived Assets	30,581.1				27,923.3				30,581.1	27,923.3
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									4,304.1	3,947.5	3,703.7
Long-Lived Assets	16,578.7				16,543.7				16,578.7	16,543.7
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,217.0	1,540.5	1,164.4
Long-Lived Assets	3,708.8				3,947.8				3,708.8	3,947.8
Burkina Faso
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									0.0	0.0	0.0
Long-Lived Assets	275.3				0.0				275.3	0.0
Ghana
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									124.3	125.4	122.9
Long-Lived Assets	671.0				159.2				671.0	159.2
Kenya
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									27.3	7.0	0.0
Long-Lived Assets	761.7				190.0				761.7	190.0
Niger
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									0.0	0.0	0.0
Long-Lived Assets	199.8				0.0				199.8	0.0
Nigeria
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									229.9	220.7	213.9
Long-Lived Assets	648.6				606.5				648.6	606.5
South Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									129.1	125.3	106.5
Long-Lived Assets	409.4				342.5				409.4	342.5
Uganda
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									73.3	67.1	60.3
Long-Lived Assets	847.3				138.7				847.3	138.7
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									68.0	72.7	59.5
Long-Lived Assets	917.1				963.8				917.1	963.8
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									66.6	69.1	63.1
Long-Lived Assets	357.3				388.5				357.3	388.5
Argentina
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									17.3	16.0	15.9
Long-Lived Assets	100.0				81.6				100.0	81.6
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									605.5	595.5	620.1
Long-Lived Assets	2,138.4				2,288.1				2,138.4	2,288.1
Chile
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									43.3	44.2	40.4
Long-Lived Assets	437.6				129.7				437.6	129.7
Colombia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									102.1	103.8	89.3
Long-Lived Assets	375.2				381.6				375.2	381.6
Costa Rica
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									21.1	18.4	19.4
Long-Lived Assets	124.1				119.1				124.1	119.1
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									515.3	456.5	364.3
Long-Lived Assets	1,524.9				1,421.3				1,524.9	1,421.3
Paraguay
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									12.6	10.4	2.7
Long-Lived Assets	111.3				107.4				111.3	107.4
Peru
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									23.5	20.0	17.5
Long-Lived Assets	394.6				113.8				394.6	113.8
Total International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									3,276.2	3,492.6	$ 2,960.2
Long-Lived Assets	$ 14,002.4				$ 11,379.6				$ 14,002.4	$ 11,379.6