LEASES Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Operating lease costs	$ 37	$ 76
Variable lease costs	15	37
Short-term lease costs	7	18
Amortization of lease assets	3	5
Interest on lease liabilities	1	2
Total lease cost, net	$ 63	$ 138