UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 1,062,253		$ 832,989		$ 1,969,922		$ 1,514,721
Other comprehensive income, net of tax
Foreign currency translation adjustments	(124,412)	[1]	114,366	[1]	(130,997)	[1]	52,547	[1]
Unrealized gain (loss) on marketable securities	(26,127)	[2]	977	[2]	(25,936)	[2]	476	[2]
Comprehensive income	911,714		948,332		1,812,989		1,567,744
Less: Comprehensive loss attributable to noncontrolling interests	0		0		0		(10,279)
Comprehensive income attributable to common stockholders	$ 911,714		$ 948,332		$ 1,812,989		$ 1,578,023

[1] Net of tax of $18,046 and $33,391 for the three and nine months ended September 30, 2014, respectively, and net of tax benefit of $42,253 and $27,969 for the three and nine months ended 2013, respectively, associated with net investment hedges. See Note 12.

[2] Net of tax benefit of $8,747 and $8,693 for the three and nine months ended September 30, 2014, respectively, and net of tax of $452 and $201 for the three and nine months ended 2013, respectively.