Share-Based Compensation Share-Based Compensation - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended																			12 Months Ended																		12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 30, 2013 Restricted stock	Dec. 31, 2013 Restricted stock	Dec. 30, 2012 Restricted stock	Dec. 31, 2012 Restricted stock	Dec. 30, 2011 Restricted stock	Dec. 31, 2011 Restricted stock	Dec. 31, 2013 Restricted stock Minimum	Dec. 31, 2013 Stock Options	Dec. 31, 2012 Stock Options	Dec. 31, 2011 Stock Options	Dec. 31, 2013 Management [Member] Retention Based Stock Option Award [Member]	Dec. 31, 2013 Management [Member] Incentive Based Stock Option Award [Member]	Dec. 31, 2013 Management [Member] Stock Options	Dec. 31, 2013 Management [Member] Performance Shares [Member]	Dec. 31, 2005 Management [Member] Prior to 2006 [Member] Stock Options	Dec. 31, 2013 Employee [Member] Minimum	Dec. 31, 2013 Employee [Member] Maximum	Dec. 31, 2013 Long-Term Incentive Plan [Member]	Dec. 31, 2013 Long-Term Incentive Plan [Member] Maximum	Dec. 31, 2012 Long-Term Incentive Plan [Member] Management [Member] Year of 2012 [Member] Performance Shares [Member]	Dec. 31, 2012 Long-Term Incentive Plan [Member] Management [Member] Year of 2012 [Member] Performance Shares [Member] Minimum	Dec. 31, 2012 Long-Term Incentive Plan [Member] Management [Member] Year of 2012 [Member] Performance Shares [Member] Maximum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Management [Member] Year of 2013 [Member] Performance Shares [Member] Maximum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Management [Member] Year of 2013 [Member] TSR [Member] Minimum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Management [Member] Year of 2013 [Member] TSR [Member] Maximum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Management [Member] Year of 2013 [Member] Operational Component [Member] Minimum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Management [Member] Year of 2013 [Member] Operational Component [Member] Maximum	Dec. 31, 2013 Long-Term Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2012 Long-Term Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2011 Long-Term Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2013 Long-Term Incentive Plan [Member] Employee [Member]	Dec. 31, 2012 Long-Term Incentive Plan [Member] Employee [Member]	Dec. 31, 2011 Long-Term Incentive Plan [Member] Employee [Member]	Dec. 31, 2013 2003 Stock Incentive Plan [Member]	Dec. 31, 2012 2003 Stock Incentive Plan [Member]	Dec. 31, 2011 2003 Stock Incentive Plan [Member]	Dec. 31, 2013 2003 Stock Incentive Plan [Member] Maximum	Dec. 31, 2013 2003 Stock Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2012 2003 Stock Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2011 2003 Stock Incentive Plan [Member] Non-Employee Director [Member]	Dec. 31, 2013 2003 Stock Incentive Plan [Member] Non-Employee Director [Member] Maximum	Dec. 31, 2012 TSR is less than zero [Member] Long-Term Incentive Plan [Member] Year of 2012 [Member] Performance Shares [Member]	Dec. 31, 2013 Stock Option Award Three Year Anniversary [Member] Management [Member] Retention Based Stock Option Award [Member]	Dec. 31, 2013 Stock Optioin Award Four Year Anniversary [Member] Management [Member] Retention Based Stock Option Award [Member]	Dec. 31, 2013 Stock option Award Five Year Anniversary [Member] Management [Member] Retention Based Stock Option Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period											3 years					3 years		3 years	4 years	3 years	4 years	10 years																									3 years	4 years	5 years
Common Stock, Shares, Issued	666,192,371	666,467,664	660,888,000	655,251,000																																						10,000
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000																					59,300,000																		10,000,000				250,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					(599,000)		5,038,000		4,961,000																							147,108	170,151	68,824	2,500,000	5,000,000	4,500,000	0	0	400,000		20,000	30,000	10,000
Remaining Shares Available For Issuance																						12,700,000																130,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value						$ 342
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						3 years 7 months						2 years 6 months 5 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized						195
Recognized Reduction In Tax Benefits						14		32		23		1	2	3
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																	10 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options												16
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage															33.00%									250.00%	0.00%	125.00%	200.00%	0.00%	125.00%	0.00%	62.50%															100.00%
Allocated Share-based Compensation Expense	$ 48	$ 14	$ 0