Stockholders' Equity (Changes To Equity) (Details)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Increase (Decrease) in Common Shares Outstanding [Roll Forward]
Common shares outstanding at January 1	203,551,496,000		209,332,646,000		106,529,376,000
Common shares issued in connection with merger with Frontier	0		0		103,270,002,000
Issuance of restricted stock, excluding restricted stock with performance feature	292,855,000		691,207,000		512,880,000
Vesting of performance units	210,819,000		869,231,000		233,134,000
Vesting of restricted stock with performance feature	15,141,000		146,400,000		124,332,000
Forfeitures of restricted stock	(15,794,000)		(3,975,000)		(3,730,000)
Purchase of treasury stock	(5,224,166,000)	[1]	(7,484,013,000)	[1]	(1,333,348,000)	[1]
Common shares outstanding at December 31	198,830,351,000		203,551,496,000		209,332,646,000

[1] Includes 235,922, 560,484 and 747,225 shares, respectively, withheld under the terms of stock-based compensation agreements to provide funds for the payment of payroll and income taxes due at the vesting of share-based award