Consolidated Statements of Change in Equity, Accumulated Other Comprehensive Loss and Redeemable Non-Controlling Interest - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non- Controlling Interest in Consolidated Subsidiaries	Redeemable Non-Controlling Interest
Beginning Balance (in shares) at Dec. 31, 2015		628,000,000	34,000,000
Beginning Balance at Dec. 31, 2015	$ 14,840	$ 6	$ (1,448)	$ 12,290	$ 4,148	$ (188)	$ 32	$ 35
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(156)					(156)
Exercise of common stock options (in shares)		1,000,000
Exercise of common stock options	22			22
Treasury shares retired in connection with stock split (in shares)		(35,000,000)	35,000,000
Treasury shares retired in connection with stock split	0		$ 1,512	(1,142)	(370)			0
Repurchases of common stock (in shares)			(1,000,000)
Repurchases of common stock	(50)		$ (50)
Payments relating to treasury shares (in shares)			(1,000,000)
Payments relating to treasury shares	(54)		$ (54)
Stock-based compensation	136			136
Issuance of restricted stock (in shares)		2,000,000
Issuance of restricted stock	0
Adjustment to redemption value	(2)				(2)			1
Distributions of profits	(19)						(19)	(3)
Dividends paid to shareholders	(409)				(409)
Net income attributable to non-controlling interest	(3)				(27)		24	3
Net income	$ 1,449				1,449
Ending Balance (in shares) at Dec. 31, 2016	596,000,000	596,000,000	1,000,000
Ending Balance at Dec. 31, 2016	$ 15,754	$ 6	$ (40)	11,306	4,789	(344)	37	36
Accumulated other comprehensive loss was as follows:
Foreign currency translation adjustments	(345)
Fair value of available-for-sale securities	108
Comprehensive income from equity method investment	2
Employee benefit plans adjustments	(109)
Accumulated other comprehensive loss	(344)
Other comprehensive loss	$ 22					22
Exercise of common stock options (in shares)	429,435	0
Exercise of common stock options	$ 11			11
Repurchases of common stock (in shares)	(11,469,042)		(11,000,000)
Repurchases of common stock	$ (709)		$ (709)
Payments relating to treasury shares (in shares)			(2,000,000)
Payments relating to treasury shares	(85)		$ (85)
Stock-based compensation	116			116
Issuance of restricted stock (in shares)		4,000,000
Issuance of restricted stock	0		$ 1	(1)
Acquisition of non-controlling interest	(14)			(9)			(5)
Acquisition of redeemable non-controlling interest	(2)				(2)			(37)
Distributions of profits	(26)						(26)
Dividends paid to shareholders	(358)				(358)
Net income attributable to non-controlling interest	(1)				(22)		21	1
Net income	$ 1,311				1,311
Ending Balance (in shares) at Sep. 30, 2017	600,000,000	600,000,000	14,000,000
Ending Balance at Sep. 30, 2017	$ 16,019	$ 6	$ (833)	$ 11,423	$ 5,718	$ (322)	$ 27	$ 0
Accumulated other comprehensive loss was as follows:
Foreign currency translation adjustments	(215)
Fair value of available-for-sale securities	0
Comprehensive income from equity method investment	2
Employee benefit plans adjustments	(109)
Accumulated other comprehensive loss	$ (322)