Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income before income taxes (benefit):
Domestic	$ 3,386.7	$ 2,557.4	$ 1,953.0
Foreign	1,380.6	1,389.2	527.6
Income before income tax expense and equity in loss of investee, net of tax	4,767.3	3,946.6	2,480.6
Current
Federal	1,214.1	1,159.5	700.9
State	38.6	65.2	98.4
Foreign	54.5	73.4	46.8
Total	1,307.2	1,298.1	846.1
Deferred
Federal	(129.6)	(280.9)	(200.6)
State	(1.9)	(21.0)	(35.9)
Foreign	(14.1)	(6.3)	(8.6)
Total	(145.6)	(308.2)	(245.1)
Total income tax expense	$ 1,161.6	$ 989.9	$ 601.0