Shareholders' Equity - Redomestication Narrative (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended
	Apr. 30, 2012	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Treasury stock shares cancelled (in shares)	60
Impact of cancellation of treasury shares on ordinary shares	$ 60,000,000
Impact of cancellation of treasury shares on Retained earnings	2,400,000,000
Cost of treasury stock shares eliminated	2,500,000,000
Common stock, par value before redomestication (in dollars per share)	$ 1.00
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Impact of redomestication in ordinary shares	323,000,000
Impact of redomestication on additional paid-in-capital	323,000,000
Distributable reserves available amount		$ 4,000,000,000	$ 5,900,000,000