Share Based Compensation (Share Based Compensation Plans) (Details)	6 Months Ended
	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Director stock awards granted	1,500,000
Employee Stock Purchase Plan shares issued	18,056,000
Restricted stock awards granted	147,800,000
Restricted stock awards forfeited	17,000,000
Shares released from Deferred Compensation Plan	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding as of December 31, 2012	1,281,821,000
Stock Option, Granted	431,662,000
Stock Option, Exercised	(145,840,000)
Stock Option, Forfeited	0
Stock Option, Expired	(1,576,000)
Stock Options, Outstanding as of June 30, 2013	1,566,067,000
Shares available for future grants and ESPP purchases as of June 30, 2013	937,987,000
Era Group [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Option, Granted	318,012