Stock Compensation Plans and Other Compensation Arrangements (Unaudited)

6 Months Ended

Jun. 30, 2018

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

STOCK COMPENSATION PLANS AND OTHER COMPENSATION ARRANGEMENTS

Stock Awards

The following table presents the number of restricted stock rights (RSRs) and restricted performance stock rights (RPSRs) granted to employees under the company's long-term incentive stock plan and the grant date aggregate fair value of those stock awards for the periods presented:



	Six Months Ended June 30
in millions	2018		2017
RSRs granted	0.1		0.1
RPSRs granted	0.2		0.3
Grant date aggregate fair value	$	114	$	91

RSRs typically vest on the third anniversary of the grant date, while RPSRs generally vest and pay out based on the achievement of financial metrics over a three-year period.

Cash Awards

The following table presents the minimum and maximum aggregate payout amounts related to cash units (CUs) and cash performance units (CPUs) granted to employees in the periods presented:



	Six Months Ended June 30
$ in millions	2018		2017
Minimum aggregate payout amount	$	36	$	35
Maximum aggregate payout amount	205		198

CUs typically vest and settle in cash on the third anniversary of the grant date, while CPUs generally vest and pay out in cash based on the achievement of financial metrics over a three-year period.