LONG-TERM OBLIGATIONS (Outstanding Amounts) (Details) GH₵ in Millions			12 Months Ended
	Jun. 14, 2019 USD ($)	Jun. 14, 2019 GHS (GH₵)	Dec. 31, 2019 USD ($)	Oct. 03, 2019	Jun. 13, 2019	Apr. 22, 2019	Mar. 15, 2019	Feb. 15, 2019	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 08, 2017	May 29, 2015 USD ($)	Jan. 10, 2014	Aug. 19, 2013
Debt Instrument [Line Items]
Finance and capital lease obligations			$ 30,700,000
Finance and capital lease obligations									$ 179,500,000	$ 179,500,000
Total			24,055,400,000						21,159,900,000
Less current portion long-term obligations			(2,928,200,000)						(2,754,800,000)
Long-term obligations			$ 21,127,200,000						18,405,100,000
Payment terms, repayment period			12 months
Parent
Debt Instrument [Line Items]
Long-term debt			$ 20,942,500,000						17,847,500,000
Subsidiaries
Debt Instrument [Line Items]
Long-term debt			$ 3,082,200,000						3,132,900,000
1.375% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate			1.375%
1.950% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate			1.95%
Revolving Credit Facility | 2019 Multicurrency Credit Facility
Debt Instrument [Line Items]
Long-term debt			$ 700,000,000.0						1,875,000,000.0
Debt interest rate, effective percentage			2.865%
Revolving Credit Facility | 2019 Multicurrency Credit Facility | Maximum
Debt Instrument [Line Items]
Principal amount			$ 3,000,000,000.0
Revolving Credit Facility | 2019 Credit Facility
Debt Instrument [Line Items]
Long-term debt			$ 1,600,000,000.0						0
Debt interest rate, effective percentage			4.875%
Revolving Credit Facility | 2019 Credit Facility | Maximum
Debt Instrument [Line Items]
Principal amount			$ 2,250,000,000
Unsecured Debt
Debt Instrument [Line Items]
Payment terms, repayment period			3 years
Unsecured Debt | 2018 Term Loan
Debt Instrument [Line Items]
Long-term debt			$ 0						1,499,800,000
Unsecured Debt | 2019 364-Day Term Loan
Debt Instrument [Line Items]
Long-term debt			$ 999,900,000						0
Debt interest rate, effective percentage			2.60%
Principal amount			$ 1,000,000,000.0
Unsecured Debt | 2019 Term Loan
Debt Instrument [Line Items]
Long-term debt			$ 995,200,000						994,800,000
Debt interest rate, effective percentage			2.925%
Principal amount			$ 1,000,000,000.0
Unsecured Debt | India Indebtedness
Debt Instrument [Line Items]
Long-term debt			0						240,100,000
Unsecured Debt | Shareholder loans
Debt Instrument [Line Items]
Long-term debt			0						59,900,000
Repayments of long-term debt	$ 56,800,000	GH₵ 294.4
Unsecured Debt | Other subsidiary debt
Debt Instrument [Line Items]
Long-term debt			422,400,000						152,500,000
Senior Notes | 3.40% senior notes
Debt Instrument [Line Items]
Long-term debt			0						1,000,000,000.0
Long-term debt, stated interest rate								3.40%
Senior Notes | 2.800% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 749,400,000						747,800,000
Long-term debt, stated interest rate			2.80%
Principal amount			$ 750,000,000.0
Senior Notes | 5.050% senior notes
Debt Instrument [Line Items]
Long-term debt			0						698,700,000
Long-term debt, stated interest rate						5.05%
Senior Notes | 3.300% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 748,500,000						747,200,000
Long-term debt, stated interest rate			3.30%
Principal amount			$ 750,000,000.0
Senior Notes | 3.450% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 647,700,000						646,300,000
Long-term debt, stated interest rate			3.45%
Principal amount			$ 650,000,000.0
Senior Notes | 5.900% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 498,900,000						498,400,000
Long-term debt, stated interest rate			5.90%
Principal amount			$ 500,000,000.0
Senior Notes | 2.250% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 592,100,000						572,700,000
Long-term debt, stated interest rate			2.25%
Principal amount			$ 600,000,000.0
Senior Notes | 4.70% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 698,200,000						697,400,000
Long-term debt, stated interest rate			4.70%
Principal amount			$ 700,000,000.0
Senior Notes | 3.50% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 994,300,000						992,600,000
Long-term debt, stated interest rate			3.50%
Principal amount			$ 1,000,000,000.0
Senior Notes | 3.000% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 704,900,000						687,500,000
Long-term debt, stated interest rate			3.00%								3.00%
Principal amount			$ 700,000,000.0
Senior Notes | 5.00% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 1,001,700,000						1,002,100,000
Long-term debt, stated interest rate			5.00%										5.00%	5.00%
Principal amount			$ 1,000,000,000.0
Senior Notes | 3.375% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 644,400,000						0
Long-term debt, stated interest rate			3.375%
Principal amount			$ 650,000,000.0
Senior Notes | 2.950% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 641,300,000						0
Long-term debt, stated interest rate			2.95%		2.95%
Principal amount			$ 650,000,000.0
Senior Notes | 1.375% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 553,000,000.0						564,000,000.0
Long-term debt, stated interest rate			1.375%
Principal amount			$ 560,600,000
Senior Notes | 4.000% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 743,200,000						742,100,000
Long-term debt, stated interest rate			4.00%
Principal amount			$ 750,000,000.0
Senior Notes | 4.400% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 496,600,000						496,100,000
Long-term debt, stated interest rate			4.40%
Principal amount			$ 500,000,000.0
Senior Notes | 1.950% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 554,400,000						566,000,000.0
Long-term debt, stated interest rate			1.95%
Principal amount			$ 560,600,000
Senior Notes | 3.375% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 987,900,000						986,300,000
Long-term debt, stated interest rate			3.375%
Principal amount			$ 1,000,000,000.0
Senior Notes | 3.125% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 397,600,000						397,300,000
Long-term debt, stated interest rate			3.125%
Principal amount			$ 400,000,000.0
Senior Notes | 2.750% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 743,500,000						0
Long-term debt, stated interest rate			2.75%	2.75%
Principal amount			$ 750,000,000.0
Senior Notes | 3.55% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 744,100,000						743,500,000
Long-term debt, stated interest rate			3.55%
Principal amount			$ 750,000,000.0
Senior Notes | 3.600% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 692,600,000						691,900,000
Long-term debt, stated interest rate			3.60%
Principal amount			$ 700,000,000.0
Senior Notes | 3.950% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 589,600,000						0
Long-term debt, stated interest rate			3.95%				3.95%
Principal amount			$ 600,000,000.0
Senior Notes | 3.800% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 1,631,700,000						0
Long-term debt, stated interest rate			3.80%		3.80%
Principal amount			$ 1,650,000,000.0
Senior Notes | 3.700% senior notes
Debt Instrument [Line Items]
Long-term debt			$ 591,800,000						0
Long-term debt, stated interest rate			3.70%	3.70%
Principal amount			$ 600,000,000.0
Secured Debt | Series 2013-2A Securities
Debt Instrument [Line Items]
Long-term debt			$ 1,295,000,000.0						1,293,400,000
Long-term debt, stated interest rate			3.07%
Secured Debt | Series 2018-1A Securities
Debt Instrument [Line Items]
Long-term debt			$ 493,800,000						493,500,000
Long-term debt, stated interest rate			3.652%
Secured Debt | Series 2015-1 Class
Debt Instrument [Line Items]
Long-term debt			$ 349,600,000						348,800,000			$ 350,000,000.0
Long-term debt, stated interest rate			2.35%
Secured Debt | Series 2015-2 Class
Debt Instrument [Line Items]
Long-term debt			$ 521,400,000						520,800,000			$ 525,000,000.0
Long-term debt, stated interest rate			3.482%
Mandatorily Redeemable Preferred Stock | India preference shares
Debt Instrument [Line Items]
Long-term debt			$ 0						$ 23,900,000