Stock Compensation Plans and Other Compensation Arrangements (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Allocation of Stock-based Compensation Expense by Plan

Stock-based compensation expense and the related tax benefits for the years ended December 31, 2014, 2013 and 2012, are as follows:

	Year Ended December 31
$ in millions	2014		2013		2012
Stock-based compensation expense:
Stock options	$	—	$	4	$	10
Stock awards	134		140		173
Total stock-based compensation expense	134		144		183
Tax benefits from the exercise of stock options	29		25		26
Tax benefits from the issuance of stock awards	52		16		19
Total tax benefits recognized for stock-based compensation	$	81	$	41	$	45

Stock Award Rollforward Activity

	Stock Awards (in thousands)		Weighted- Average Grant Date Fair Value		Weighted- Average Remaining Contractual Term (in years)
Outstanding at January 1, 2012	3,622		$	58	1.6
Granted	1,860		60
Vested	(1,800	)	55
Forfeited	(204	)	59
Outstanding at December 31, 2012	3,478		$	61	1.6
Granted	1,577		64
Vested	(1,323	)	60
Forfeited	(312	)	62
Outstanding at December 31, 2013	3,420		$	61	1.5
Granted	763		118
Vested	(1,217	)	58
Forfeited	(158	)	70
Outstanding at December 31, 2014	2,808		$	77	1.1