Shareholders' Equity (Shareholders' Equity Activity) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			$ 7,033	$ 8,203
Net Income (Loss)	$ (161)	$ 89	(751)	(76)
Other Comprehensive Loss	(357)	(207)	(566)	(243)
Consolidation of Joint Venture				27
Dividends Paid to Noncontrolling Interests			(31)	(22)
Change in Common Shares Associated with Redomestication				11
Equity Awards Granted, Vested and Exercised			69	42
Balance, ending balance	5,754	7,942	5,754	7,942
Par Value of Issued Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			1	775
Consolidation of Joint Venture				0
Change in Common Shares Associated with Redomestication				$ (778)
Equity Awards Granted, Vested and Exercised				4
Equity Awards Granted, Vested and Exercised			0
Balance, ending balance	1	1	1	$ 1
Capital in Excess of Par Value [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			5,411	4,600
Consolidation of Joint Venture				0
Change in Common Shares Associated with Redomestication				750
Equity Awards Granted, Vested and Exercised			69	40
Balance, ending balance	5,480	5,390	5,480	5,390
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			2,427	3,011
Net Income (Loss)			(777)	(109)
Consolidation of Joint Venture				0
Change in Common Shares Associated with Redomestication				0
Equity Awards Granted, Vested and Exercised				0
Balance, ending balance	1,650	2,902	1,650	2,902
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			(881)	(187)
Other Comprehensive Loss			(566)	(243)
Consolidation of Joint Venture				0
Change in Common Shares Associated with Redomestication				0
Equity Awards Granted, Vested and Exercised				0
Balance, ending balance	(1,447)	(430)	(1,447)	(430)
Treasury Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			0	(37)
Consolidation of Joint Venture				0
Change in Common Shares Associated with Redomestication				39
Equity Awards Granted, Vested and Exercised			0	(2)
Balance, ending balance	0	0	0	0
Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning balance			75	41
Net Income (Loss)			26	33
Consolidation of Joint Venture				27
Dividends Paid to Noncontrolling Interests			(31)	(22)
Change in Common Shares Associated with Redomestication				0
Equity Awards Granted, Vested and Exercised				0
Balance, ending balance	$ 70	$ 79	$ 70	$ 79