FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Carrying Amount | Publicly traded debt
Liabilities:
Long-term debt	$ 8,592.5	$ 8,849.6
Carrying Amount | Non-publicly traded debt
Liabilities:
Long-term debt	1.7	1.9
Fair Value | Publicly traded debt
Liabilities:
Long-term debt	7,639.8	9,777.4
Fair Value | Non-publicly traded debt
Liabilities:
Long-term debt	1.6	1.9
Fair Value Measurements on a Recurring Basis | Fair Value
Assets:
Net investment hedge asset	15.4
Total assets, fair value	117.0	179.2
Liabilities:
Net investment hedge liability	0.0	36.5
Fair Value Measurements on a Recurring Basis | Fair Value | Deferred compensation plan assets
Assets:
Plan assets	72.0	80.4
Fair Value Measurements on a Recurring Basis | Fair Value | Qualified Replacement Plan assets
Assets:
Plan assets	29.6	98.8
Fair Value Measurements on a Recurring Basis | Level 1
Assets:
Total assets, fair value	71.4	141.9
Fair Value Measurements on a Recurring Basis | Level 1 | Deferred compensation plan assets
Assets:
Plan assets	41.8	43.1
Fair Value Measurements on a Recurring Basis | Level 1 | Qualified Replacement Plan assets
Assets:
Plan assets	29.6	98.8
Fair Value Measurements on a Recurring Basis | Level 2
Assets:
Net investment hedge asset	15.4
Total assets, fair value	45.6	37.3
Liabilities:
Net investment hedge liability		36.5
Fair Value Measurements on a Recurring Basis | Level 2 | Deferred compensation plan assets
Assets:
Plan assets	30.2	37.3
Liabilities:
Cost basis of investment funds	65.2	63.0
Fair Value Measurements on a Recurring Basis | Level 2 | Qualified Replacement Plan assets
Liabilities:
Cost basis of investment funds	31.2	86.9
Fair Value Measurements on a Recurring Basis | Level 3
Assets:
Total assets, fair value	$ 0.0	$ 0.0