Equity (Narrative) (Details) In Billions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Par Value US [Member] USD ($)	Dec. 31, 2014 Par Value Euro [Member] EUR (€)	Dec. 31, 2014 Ordinary shares [Member]	Dec. 31, 2014 Ordinary shares [Member] Par Value US [Member]	Dec. 31, 2014 Ordinary shares [Member] Par Value Euro [Member]	Dec. 31, 2014 Preferred Stock [Member]	Dec. 31, 2013 Preferred Stock [Member]
Stock repurchased and retired during period, shares					23,000,000
Stock repurchased and retired during period, value	$ 1.4
Authorized share capital	1,185,040,000
Number of ordinary shares						1,175,000,000	40,000
Ordinary shares, par value, in dollars or euros per share, as stated	$ 1.00	$ 1.00	$ 1.00	€ 1.00
Number of preference shares								10,000,000
Preference shares, par value, in dollars per share			$ 0.001
Preference shares outstanding								0	0