BUSINESS SEGMENTS - Geographic segment information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 7,824.2	$ 6,700.4	$ 6,403.5
Property, plant and equipment, net	2,270.9	2,354.9
United States
Segment Reporting Information [Line Items]
Revenues	1,569.5	1,348.4	1,137.2
Property, plant and equipment, net	272.0	357.2
Brazil
Segment Reporting Information [Line Items]
Revenues	1,687.6	1,047.3	767.8
Property, plant and equipment, net	352.3	306.4
Norway
Segment Reporting Information [Line Items]
Revenues	1,134.1	907.6	979.9
Property, plant and equipment, net	227.1	225.3
United Kingdom
Segment Reporting Information [Line Items]
Revenues	867.2	710.3	542.5
Property, plant and equipment, net	714.7	741.6
Guyana
Segment Reporting Information [Line Items]
Revenues	500.4	369.1	314.7
Angola
Segment Reporting Information [Line Items]
Revenues	400.8	247.9	406.3
Ghana
Segment Reporting Information [Line Items]
Revenues	265.6	184.7	73.4
Australia
Segment Reporting Information [Line Items]
Revenues	174.6	295.4	419.8
United Arab Emirates
Segment Reporting Information [Line Items]
Revenues	161.4	117.8	49.4
Saudi Arabia
Segment Reporting Information [Line Items]
Revenues	148.9	98.8	119.5
Malaysia
Segment Reporting Information [Line Items]
Revenues	69.2	228.5	206.9
Indonesia
Segment Reporting Information [Line Items]
Revenues	50.0	42.6	224.9
Mozambique
Segment Reporting Information [Line Items]
Revenues	153.6	284.4	472.0
Trinidad
Segment Reporting Information [Line Items]
Revenues	3.8	6.7	78.1
All other countries
Segment Reporting Information [Line Items]
Revenues	637.5	810.9	$ 611.1
Property, plant and equipment, net	310.0	337.4
Netherlands
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 394.8	$ 387.0