DEBT AND INTEREST - Other Debt Information (Details) € in Millions, $ in Millions	1 Months Ended		3 Months Ended								12 Months Ended
	Sep. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 EUR (€)
Debt instrument
CARRYING VALUE			$ 8,349.7				$ 6,671.1				$ 8,349.7	$ 6,671.1
Long-term debt, current maturities			(2.5)				(1.8)				(2.5)	(1.8)
Long-term debt			8,347.2				6,669.3				8,347.2	6,669.3
Payment for Debt Extinguishment or Debt Prepayment Cost	$ 25.0
Aggregate annual maturities of long-term debt
2022			2.0								2.0
2023			500.0								500.0
2024			650.0								650.0
2025			651.0								651.0
2026			745.0								745.0
Interest
Interest expense											230.6	304.8	$ 214.4
Interest income											(12.3)	(14.6)	(23.7)
Interest expense, net			44.6	$ 76.4	$ 45.6	$ 51.7	48.4	$ 134.8	$ 58.7	$ 48.3	218.3	290.2	$ 190.7
Interest expense
Debt instrument
Debt refinancing charges, pre-tax											32.3	83.1
Debt Refinancing Charges, Net of Tax											$ 28.4	64.0
Public Notes
Debt instrument
Principal outstanding payable at time of prepayment of notes (as a percent)											101.00%
Thirty year 2011 senior notes
Debt instrument
CARRYING VALUE			$ 384.3				$ 452.2				$ 384.3	$ 452.2
AVERAGE INTEREST RATE (as a percent)			5.50%				5.50%				5.50%	5.50%		5.50%
Effective interest rate (as a percent)			5.63%				5.56%				5.63%	5.56%		5.63%
Aggregate principal amount			$ 389.0								$ 389.0
Debt instrument, term											30 years
Five year 2017 senior notes
Debt instrument
CARRYING VALUE							$ 498.6					$ 498.6
AVERAGE INTEREST RATE (as a percent)							2.38%					2.38%
Effective interest rate (as a percent)							2.55%					2.55%
Aggregate principal amount			500.0								$ 500.0
Debt instrument, term											5 years
Two Year 2021 Senior Notes [Member]
Debt instrument
CARRYING VALUE			$ 497.2								$ 497.2
AVERAGE INTEREST RATE (as a percent)			0.90%								0.90%			0.90%
Effective interest rate (as a percent)			1.19%								1.19%			1.19%
Aggregate principal amount			$ 500.0								$ 500.0
Debt instrument, term											2 years
Six Year 2021 Senior Notes [Member]
Debt instrument
CARRYING VALUE			$ 495.7								$ 495.7
AVERAGE INTEREST RATE (as a percent)			1.65%								1.65%			1.65%
Effective interest rate (as a percent)			1.84%								1.84%			1.84%
Aggregate principal amount			$ 500.0								$ 500.0
Debt instrument, term											6 years
Eleven Year 2021 Senior Notes [Member]
Debt instrument
CARRYING VALUE			$ 644.0								$ 644.0
AVERAGE INTEREST RATE (as a percent)			2.13%								2.13%			2.13%
Effective interest rate (as a percent)			2.24%								2.24%			2.24%
Aggregate principal amount			$ 650.0								$ 650.0
Debt instrument, term											11 years
Thirty Year 2021 Senior Notes [Member]
Debt instrument
CARRYING VALUE			$ 838.5								$ 838.5
AVERAGE INTEREST RATE (as a percent)			2.70%								2.70%			2.70%
Effective interest rate (as a percent)			2.78%								2.78%			2.78%
Aggregate principal amount			$ 850.0								$ 850.0
Debt instrument, term											30 years
Ten year 2017 senior notes
Debt instrument
CARRYING VALUE			$ 488.4				$ 496.0				$ 488.4	$ 496.0
AVERAGE INTEREST RATE (as a percent)			3.25%				3.25%				3.25%	3.25%		3.25%
Effective interest rate (as a percent)			2.89%				3.37%				2.89%	3.37%		2.89%
Aggregate principal amount			$ 500.0								$ 500.0
Debt instrument, term											10 years
Thirty year 2017 senior notes
Debt instrument
CARRYING VALUE			$ 424.3				$ 611.9				$ 424.3	$ 611.9
AVERAGE INTEREST RATE (as a percent)			3.95%				3.95%				3.95%	3.95%		3.95%
Effective interest rate (as a percent)			4.80%				4.16%				4.80%	4.16%		4.80%
Aggregate principal amount			$ 484.0								$ 484.0
Debt instrument, term											30 years
Thirty year 2020 senior notes
Debt instrument
CARRYING VALUE			$ 490.4				$ 490.1				$ 490.4	$ 490.1
AVERAGE INTEREST RATE (as a percent)			2.13%				2.13%				2.13%	2.13%		2.13%
Effective interest rate (as a percent)			2.24%				2.15%				2.24%	2.15%		2.24%
Aggregate principal amount			$ 500.0								$ 500.0
Debt instrument, term											30 years
Thirty-four year 2021 senior notes
Debt instrument
CARRYING VALUE			$ 535.3								$ 535.3
AVERAGE INTEREST RATE (as a percent)			2.75%								2.75%			2.75%
Effective interest rate (as a percent)			3.87%								3.87%			3.87%
Aggregate principal amount			$ 685.0								$ 685.0
Debt instrument, term		34 years									34 years
Interest rate (as a percent)		2.75%
Debt exchanged		$ 385.0
Payment for Debt Extinguishment or Debt Prepayment Cost		118.0
Value of notes tendered in an exchange offering		387.0
Debt, unamortized discounts and financing costs		143.0
Ten year 2020 senior notes
Debt instrument
CARRYING VALUE			$ 709.1				$ 765.2				$ 709.1	$ 765.2
AVERAGE INTEREST RATE (as a percent)			4.80%				4.80%				4.80%	4.80%		4.80%
Effective interest rate (as a percent)			4.06%				4.64%				4.06%	4.64%		4.06%
Aggregate principal amount			$ 698.0								$ 698.0
Debt instrument, term											10 years
Ten year 2020 senior notes, maturing in 2031
Debt instrument
CARRYING VALUE			$ 593.4				$ 594.4				$ 593.4	$ 594.4
AVERAGE INTEREST RATE (as a percent)			1.30%				1.30%				1.30%	1.30%		1.30%
Effective interest rate (as a percent)			1.39%				1.34%				1.39%	1.34%		1.39%
Aggregate principal amount			$ 600.0								$ 600.0
Debt instrument, term											10 years
Seven year 2016 senior notes
Debt instrument
CARRYING VALUE							$ 399.0					$ 399.0
AVERAGE INTEREST RATE (as a percent)							3.25%					3.25%
Effective interest rate (as a percent)							3.49%					3.49%
Aggregate principal amount			400.0								$ 400.0
Debt instrument, term											7 years
Seven year 2016 senior euro notes
Debt instrument
CARRYING VALUE			$ 649.3				$ 682.0				$ 649.3	$ 682.0
AVERAGE INTEREST RATE (as a percent)			1.00%				1.00%				1.00%	1.00%		1.00%
Effective interest rate (as a percent)			1.19%				1.18%				1.19%	1.18%		1.19%
Aggregate principal amount | €														€ 575
Debt instrument, term											7 years
Ten year 2016 senior notes
Debt instrument
CARRYING VALUE			$ 744.9				$ 745.3				$ 744.9	$ 745.3
AVERAGE INTEREST RATE (as a percent)			2.70%				2.70%				2.70%	2.70%		2.70%
Effective interest rate (as a percent)			2.89%				2.93%				2.89%	2.93%		2.89%
Aggregate principal amount			$ 750.0								$ 750.0
Debt instrument, term											10 years
Thirty year 2016 senior notes
Debt instrument
CARRYING VALUE			$ 197.2				$ 246.4				$ 197.2	$ 246.4
AVERAGE INTEREST RATE (as a percent)			3.70%				3.70%				3.70%	3.70%		3.70%
Effective interest rate (as a percent)			3.81%				3.76%				3.81%	3.76%		3.81%
Aggregate principal amount			$ 200.0								$ 200.0
Debt instrument, term											30 years
Ten Year 2015 senior euro notes
Debt instrument
CARRYING VALUE			$ 649.7				$ 682.9				$ 649.7	$ 682.9
AVERAGE INTEREST RATE (as a percent)			2.63%				2.63%				2.63%	2.63%		2.63%
Effective interest rate (as a percent)			2.87%				2.85%				2.87%	2.85%		2.87%
Aggregate principal amount | €														€ 575
Debt instrument, term											10 years
Private Placement 34-Year 2021 Senior Notes
Debt instrument
Aggregate principal amount		$ 300.0
Other debt.
Debt instrument
CARRYING VALUE			$ 8.0				$ 7.1				$ 8.0	$ 7.1
2.375% Notes due 2022
Debt instrument
Interest rate (as a percent)	2.375%			2.375%
Debt extinguishment amount	$ 500.0
3.25% Notes due 2023
Debt instrument
Interest rate (as a percent)	3.25%			3.25%
Debt extinguishment amount	$ 400.0
Notes payable
Debt instrument
Aggregate principal amount			2,500.0								2,500.0
Delayed draw term loan
Debt instrument
Repayment of notes			3,000.0								3,000.0
Due 2023
Debt instrument
Aggregate principal amount			$ 500.0								$ 500.0
Interest rate (as a percent)			0.90%								0.90%			0.90%
Due 2027
Debt instrument
Aggregate principal amount			$ 500.0								$ 500.0
Interest rate (as a percent)			1.65%								1.65%			1.65%
Due 2032
Debt instrument
Aggregate principal amount			$ 650.0								$ 650.0
Interest rate (as a percent)			2.125%								2.125%			2.125%
Due 2051
Debt instrument
Aggregate principal amount			$ 850.0								$ 850.0
Interest rate (as a percent)			2.70%								2.70%			2.70%