INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Valuation allowance		$ (63)	$ (56)
Unrecognized tax benefits		4	6	$ 6
Unrecognized tax benefits, net		2	5
Unrecognized tax benefits, interest			1
Credits and loss carryovers		2	2
Unrecognized tax benefits that would affect our effective tax rate		2	5
Estimated decrease in unrecognized tax benefit due to the lapse of application statutes of limitation		1
Gain from potential tax adjustment		600
Built-in gains tax liability from potential tax adjustment		100
Tax affect of U.S. corporate rate change		74	$ 0	$ 0
Estimated Litigation Liability		$ 0
Maximum
Percentage of gain distributed in common stock from potential tax adjustment		80.00%
Foreign Tax Authority [Member]
Net operating loss carryforwards		$ 0
Foreign undistributed earnings		0
Federal, state and foreign
Net operating loss carryforwards		1,000
U.S. REIT
Net operating loss carryforwards		$ 684
Tax Credit Carryforward, Expiration Date		Dec. 31, 2027
Credit carryforwards		$ 6
U.S. REIT | Minimum
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2030
U.S. REIT | Maximum
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2036
State and Local Jurisdiction [Member]
Net operating loss carryforwards		$ 349
Credit carryforwards		$ 70
State and Local Jurisdiction [Member] | Minimum
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2018
Tax Credit Carryforward, Expiration Date		Dec. 31, 2018
State and Local Jurisdiction [Member] | Maximum
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2037
Tax Credit Carryforward, Expiration Date		Dec. 31, 2031
With expiration | State and Local Jurisdiction [Member]
Credit carryforwards		$ 22
Without expiration | State and Local Jurisdiction [Member]
Credit carryforwards		$ 48