FAIR VALUE MEASUREMENTS (Details Tables) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS:
Short-term investments	$ 3,129,556	$ 2,024,827
LIABILITIES:
Redeemable noncontrolling interests	110,184	127,045
Foreign government securities [Member]
ASSETS:
Short-term investments	1,155,590	1,074,186
U.S. government securities [Member]
ASSETS:
Short-term investments	1,952,265	923,322
U.S. agency securities [Member]
ASSETS:
Short-term investments	21,701	26,951
U.S. corporate notes [Member]
ASSETS:
Short-term investments		368
Recurring Basis [Member] | Level 2 [Member]
ASSETS:
Foreign exchange derivatives	25,842	60,455
Total assets at fair value	3,155,398	2,085,282
LIABILITIES:
Foreign exchange derivatives	1,727	1,107
Total liabilities at fair value	1,727	1,107
Recurring Basis [Member] | Level 2 [Member] | Foreign government securities [Member]
ASSETS:
Short-term investments	1,155,590	1,074,186
Recurring Basis [Member] | Level 2 [Member] | U.S. government securities [Member]
ASSETS:
Short-term investments	1,952,265	923,322
Recurring Basis [Member] | Level 2 [Member] | U.S. agency securities [Member]
ASSETS:
Short-term investments	21,701	26,951
Recurring Basis [Member] | Level 2 [Member] | U.S. corporate notes [Member]
ASSETS:
Short-term investments		368
Recurring Basis [Member] | Level 3 [Member]
LIABILITIES:
Redeemable noncontrolling interests	110,184	127,045
Total liabilities at fair value	110,184	127,045
Recurring Basis [Member] | Total [Member]
ASSETS:
Foreign exchange derivatives	25,842	60,455
Total assets at fair value	3,155,398	2,085,282
LIABILITIES:
Foreign exchange derivatives	1,727	1,107
Redeemable noncontrolling interests	110,184	127,045
Total liabilities at fair value	111,911	128,152
Recurring Basis [Member] | Total [Member] | Foreign government securities [Member]
ASSETS:
Short-term investments	1,155,590	1,074,186
Recurring Basis [Member] | Total [Member] | U.S. government securities [Member]
ASSETS:
Short-term investments	1,952,265	923,322
Recurring Basis [Member] | Total [Member] | U.S. agency securities [Member]
ASSETS:
Short-term investments	21,701	26,951
Recurring Basis [Member] | Total [Member] | U.S. corporate notes [Member]
ASSETS:
Short-term investments		$ 368