Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income before income taxes (benefit):
Domestic	$ 2,557,400,000	$ 1,953,000,000	$ 1,398,000,000
Foreign	1,389,200,000	527,600,000	457,100,000
Income before income tax expense and equity in loss of investee, net of tax	3,946,633,000	2,480,579,000	1,855,105,000
Current
Federal	1,159,500,000	700,900,000	507,900,000
State	65,200,000	98,400,000	35,600,000
Foreign	73,400,000	46,800,000	44,000,000
Total	1,298,100,000	846,100,000	587,500,000
Deferred
Federal	(280,900,000)	(200,600,000)	(133,000,000)
State	(21,000,000)	(35,900,000)	(13,000,000)
Foreign	(6,300,000)	(8,600,000)	29,100,000
Total	(308,222,000)	(245,077,000)	(116,900,000)
Total income tax expense	$ 989,942,000	$ 601,014,000	$ 470,554,000