Shareholders' Equity Schedule of Shares Issued and Treasury Stock (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Issued [Member]
Schedule of Issued and Treasury Shares [Line Items]
Stock Issued During Period, Shares, New Issues	200
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(779)	(774)	(840)
Equity Awards Granted, Vested and Exercised	4	5	0
Shares Cancelled due to Redomestication			840
Shares Issued due to Redomestication			774
Ending Balance	(983)	(779)	(774)
Treasury [Member]
Schedule of Issued and Treasury Shares [Line Items]
Stock Issued During Period, Shares, New Issues	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	0	(73)
Equity Awards Granted, Vested and Exercised	0	0	2
Shares Cancelled due to Redomestication			71
Shares Issued due to Redomestication			0
Ending Balance	0	0	0