Shareholders' Equity Schedule of Shares Issued and Treasury Stock (Details) - shares shares in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Issued [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	774	840	840
Equity awards granted, vested and exercised	5	0	0
Shares Cancelled due to Redomestication		(840)
Shares Issued due to Redomestication		774
Ending Balance	779	774	840
Treasury [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	(73)	(79)
Equity awards granted, vested and exercised	0	2	6
Shares Cancelled due to Redomestication		71
Shares Issued due to Redomestication		0
Ending Balance		0	(73)

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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