NOTES PAYABLE AND LEASE OBLIGATIONS - Contractual Maturities of Leases (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Operating Leases
2019		$ 33
2020		30
2021		20
2022		17
2023		9
After 2023		24
Total lease payments		133
Less: Interest		11
Present value of lease liabilities	[1]	122	$ 0
Finance Leases
2019		3
2020		3
2021		2
2022		2
2023		1
After 2023		1
Total lease payments		12
Less: Interest		0
Present value of lease liabilities		12	$ 13
Total
2019		36
2020		33
2021		22
2022		19
2023		10
After 2023		25
Total lease payments		145
Less: Interest		11
Present value of lease liabilities		$ 134

[1] See Note 1 of the Notes to the Consolidated Financial Statements for the adoption of accounting guidance on January 1, 2019 related to leases.