REVENUE - Disaggregation of Revenue, Geographical (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Lease	$ 158.4	$ 142.0	$ 266.5
Total revenue	6,403.5	6,530.6	6,950.2
Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	3,440.7	3,266.8	3,412.0
Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	2,804.4	3,121.8	3,271.7
Subsea
Disaggregation of Revenue [Line Items]
Product and service revenue	5,329.1	5,471.4	5,419.5
Lease	44.6	54.9	116.0
Total revenue	5,329.1	5,471.4	5,419.5
Subsea | Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	3,282.0	3,121.1	3,141.0
Subsea | Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	2,002.5	2,295.4	2,162.5
Subsea | Europe, Central Asia
Disaggregation of Revenue [Line Items]
Product and service revenue	1,404.4	1,664.1	1,690.2
Subsea | North America
Disaggregation of Revenue [Line Items]
Product and service revenue	753.6	899.7	660.8
Subsea | Latin America
Disaggregation of Revenue [Line Items]
Product and service revenue	1,157.7	1,042.4	1,139.5
Subsea | Asia Pacific
Disaggregation of Revenue [Line Items]
Product and service revenue	927.4	772.1	673.3
Subsea | Africa
Disaggregation of Revenue [Line Items]
Product and service revenue	1,057.3	908.6	836.4
Subsea | Middle East
Disaggregation of Revenue [Line Items]
Product and service revenue	28.7	184.5	419.3
Surface Technologies
Disaggregation of Revenue [Line Items]
Product and service revenue	1,074.4	1,059.2	1,530.7
Lease	113.8	87.1	150.5
Total revenue	1,074.4	1,059.2	1,530.7
Surface Technologies | Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	158.7	150.2	271.0
Surface Technologies | Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	801.9	821.9	1,109.2
Surface Technologies | Europe, Central Asia
Disaggregation of Revenue [Line Items]
Product and service revenue	191.5	192.7	160.1
Surface Technologies | North America
Disaggregation of Revenue [Line Items]
Product and service revenue	372.7	367.9	751.9
Surface Technologies | Latin America
Disaggregation of Revenue [Line Items]
Product and service revenue	86.7	76.6	108.6
Surface Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Product and service revenue	104.2	131.0	195.4
Surface Technologies | Africa
Disaggregation of Revenue [Line Items]
Product and service revenue	44.0	46.9	62.7
Surface Technologies | Middle East
Disaggregation of Revenue [Line Items]
Product and service revenue	$ 275.3	$ 244.1	$ 252.0