Common Stock And Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Compensation Expense For Share-Based Incentive Awards

(in millions)	2017		2016		2015
Restricted stock units	$	40	$	53	$	47
Performance shares		45		55		46
Total compensation expense (pre-tax)	$	85	$	108	$	93
Total compensation expense (after-tax)	$	50	$	64	$	55

Schedule Of Restricted Stock Units

The following table summarizes restricted stock unit activity for 2017:

	Number of	Weighted Average Grant-
	Restricted Stock Units	Date Fair Value
Nonvested at January 1	1,923,010	$	51.26
Granted	658,395		66.95
Vested	(1,172,194)		48.44
Forfeited	(29,976)		61.07
Nonvested at December 31	1,379,235	$	60.93

Schedule Of Performance Shares

The following table summarizes activity for performance shares in 2017:

	Number of	Weighted Average Grant-
	Performance Shares	Date Fair Value
Nonvested at January 1	1,838,855	$	58.65
Granted	745,724		77.00
Vested	(81,501)		53.74
Forfeited (1)	(755,050)		66.30
Nonvested at December 31	1,748,028	$	63.40
(1)Includes performance shares that expired with zero value as performance targets were not met.