SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Apr. 01, 2015
Stock option activity
Reversal of share based compensation expense		$ 6
Share-based compensation expense related to modified awards	$ 12
Stock options
Stock option activity
Granted (in shares)			145,000	261,000
Weighted average exercise price (in usd per share)			$ 212.77	$ 117.82
Weighted average grant date fair value of stock options (in usd per share)			$ 73.18	$ 62.15
Time-based RSUs
Stock option activity
Granted (in shares)			116,000	94,000
Weighted average grant date fair value of stock options (in usd per share)			$ 213.56	$ 135.06
Performance-based RSUs
Stock option activity
Granted (in shares)			865,000	410,000
Weighted average grant date fair value of stock options (in usd per share)			$ 320.17	$ 209.72
RSUs
Stock option activity
Remaining unrecognized compensation expense related to non-vested awards	$ 375		$ 375
Weighted average service period over which compensation cost is expected to be recognized (in years)			3 years 5 months 23 days
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for grant under the share based compensation plan					18,000,000
Common shares available for issuance					20,000,000
Number of shares available for future grant	14,195,301		14,195,301