Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 203,441	$ 210,749	$ 541,052	$ 376,223
Other comprehensive income (loss):
Unrecognized gain (loss) on equity investments		(5,908)	(3,611)	(16,477)	(11,160)
Unrecognized gain (loss) on cash flow hedges		0	487	0	970
Unrecognized actuarial gain/(loss)		0	0	0	2
Unrecognized gain (loss) on foreign currency translation		27,713	(50,384)	33,426	(49,012)
Total other comprehensive income (loss)		21,805	(53,508)	16,949	(59,200)
Total comprehensive income (loss), total		225,246	157,241	558,001	317,023
Total comprehensive income (loss) attributable to noncontrolling interests	[1]	11,562	(4,000)	15,198	11,271
Comprehensive income (loss) attributable to controlling interests		$ 213,684	$ 161,241	$ 542,803	$ 305,752

[1] Includes amounts attributable to redeemable noncontrolling interests.