LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating cash flows for operating leases	$ 50	$ 47	$ 47
Operating cash flows for finance leases	1	1	1
Financing cash flows for finance leases	3	2	2
Right-of-Use asset obtained in exchange for new lease obligations - Operating leases	41	126	67
Right-of-Use asset obtained in exchange for new lease obligations - Finance leases	0	$ 0	0
Sauna360
Lessee, Lease, Description [Line Items]
Right-of-Use asset obtained in exchange for new lease obligations - Operating leases	$ 6
ESS And Steamist, Inc.
Lessee, Lease, Description [Line Items]
Right-of-Use asset obtained in exchange for new lease obligations - Operating leases			$ 2