Shareholders' Equity Ordinary Shares (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended					1 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Share Repurchase Program [Member]	Dec. 31, 2012 Share Repurchase Program [Member]	Jan. 31, 2010 2010 - Share Repurchase Program [Member]	Apr. 30, 2012 2012 - Share Repurchase Program [Member]	Dec. 31, 2013 2012 - Share Repurchase Program [Member]
Common Stock Programs
Share repurchase authorization limit						$ 2,000,000,000	$ 5,000,000,000
Number of shares repurchased (in shares)				16.8	21.6			36.3
Average price per share of shares purchased under share repurchase program (in dollars per share)				$ 65.65	$ 52.16
Cost of shares repurchased	1,102,000,000	1,125,000,000	828,000,000	1,100,000,000	1,100,000,000			2,100,000,000
Share repurchase, remaining authorization limit								$ 2,900,000,000