LEASES - Total Lease Costs and Other Information (Details) $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($)
Total lease cost
Finance lease cost - amortization of right-of-use assets	$ 3
Operating lease cost	118
Short-term lease cost	6
Variable lease cost	43
Total	170
Other information
Operating cash flows from operating leases	123
Financing cash flows from finance leases	5
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 48
Weighted-average remaining lease term - finance leases	6 years
Weighted-average remaining lease term - operating leases	11 years
Weighted-average discount rate - finance leases	2.70%
Weighted-average discount rate - operating leases	2.50%