FAIR VALUE MEASUREMENTS - Estimated Fair Values of Financial Instruments, Contingent Consideration (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Changes in the fair value of the contingent consideration obligations
Change in fair value	$ 4	$ 8
Selling, general and administrative expenses
Changes in the fair value of the contingent consideration obligations
Contingent consideration at the beginning of the period	196
Change in fair value	4
Contingent consideration at the end of the period	$ 200
Level 2 | Additional Purchase Price Payable
Estimated fair values of financial instruments
Incremental borrowing rate (as a percent)	1.00%
Level 3 | Contingent Consideration | Monte Carlo Method
Estimated fair values of financial instruments
Revenue/EBITDA correlation factor (as a percent)	80
Minimum | Level 3 | Contingent Consideration | Monte Carlo Method
Estimated fair values of financial instruments
Incremental borrowing rate (as a percent)	1.80%
Revenue volatility (as a percent)	5.10%
Asset volatility (as a percent)	29.60%
Maximum | Level 3 | Contingent Consideration | Monte Carlo Method
Estimated fair values of financial instruments
Incremental borrowing rate (as a percent)	2.50%
Revenue volatility (as a percent)	13.40%
Asset volatility (as a percent)	33.00%