Consolidated Statements of Change in Equity, AOCI - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest in Consolidated Subsidiaries [Member]	Redeemable Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2013	$ 12,381	$ 1	$ (53)	$ 9,794	$ 2,482	$ 125	$ 32	$ 322
Beginning Balance, Shares at Dec. 31, 2013		115	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(171)					(171)
Exercise of common stock options	13			13
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	(45)		$ (45)
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises, Shares			0
Stock-based compensation	105			105
Stock Repurchased During Period, Shares			3
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	645		$ 645
Issuance of restricted stock		1
Tax benefits from stock option plans	26			26
Adjustment to redemption value of redeemable non-controlling interest	46				46			(46)
Acquisition of redeemable non-controlling interest	16
Distributions of profits to non-controlling interest	(17)						(17)	16
Treasury shares retired in connection with formation of ICE Group, Shares		0	0
Treasury shares retired in connection with formation of ICE Group			$ 0	0	0			(129)
Dividends paid to shareholders	(299)
Net income attributable to non-controlling interest	(18)				(35)		17	18
Net income	1,016				1,016
Ending Balance at Dec. 31, 2014	$ 12,392	$ 1	$ (743)	9,938	3,210	(46)	32	165
Ending Balance, Shares at Dec. 31, 2014	116	116	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	$ (145)					(145)
Exercise of common stock options	14			14
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	(42)		$ (42)
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises, Shares			0
Stock-based compensation	88			88
Stock Repurchased During Period, Shares			3
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	(605)		$ 605
Tax benefits from stock option plans	17			17
Adjustment to redemption value of redeemable non-controlling interest	(9)				(9)			7
Distributions of profits to non-controlling interest	(15)						(15)	9
Purchase of subsidiary shares from non-controlling interest	0			0			0	128
Dividends paid to shareholders	(242)
Net income attributable to non-controlling interest	(5)				(18)		13	5
Net income	922				922
Ending Balance at Sep. 30, 2015	$ 12,370	$ 1	$ (1,390)	$ 10,057	$ 3,863	$ (191)	$ 30	$ 40
Ending Balance, Shares at Sep. 30, 2015	116	116	(6)