Long-Term Debt and Credit Facilities (Details 1) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Notes USD ($)	Dec. 31, 2014 Notes EUR (€)	Dec. 31, 2013 Notes USD ($)	Dec. 31, 2014 Forty Year Notes at Variable Rate [Member] USD ($)	Dec. 31, 2013 Forty Year Notes at Variable Rate [Member] USD ($)	Dec. 31, 2014 Five Year Notes at 1 Point 75 Percent [Member] USD ($)	Dec. 31, 2014 Ten Year Note at 3 point 25 Percent [Member] USD ($)	Dec. 31, 2013 Five Year Notes at 1 Point 5 Percent [Member] USD ($)	Dec. 31, 2013 Five Year Notes at Point 9 Percent [Member] USD ($)	Dec. 31, 2013 Ten Year Notes at 2 Point 1 Percent [Member] USD ($)
Schedule of U.S. dollar-denominated notes [Line Items]
Face amount				$ 134	$ 82	$ 500	$ 500	$ 300	$ 400	$ 400
Debt Instrument, Term				40 years	40 years	5 years	10 years	5 years	5 years	10 years
Fixed Interest rate						1.75%	3.25%	1.50%	0.90%	2.10%
Retirement of Notes - Portion Due in Current Year	$ 250	€ 250	$ 250