XML 42 R31.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Options Roll Forward
A summary of award activity by type for the six months ended June 30, 2021 is presented below.
Stock OptionsAwards
(in millions)		Weighted-
Average
Exercise
Price		Aggregate
Intrinsic
Value
 (in millions)		Weighted
Average
Remaining
Contractual
Life (years)
Outstanding at January 1, 20212.5 $27.34 
Granted— $— 
Exercised(0.5)$28.26 
Forfeited / Expired(0.4)$32.00 
Outstanding at June 30, 20211.6 $25.77 
Vested and expected to vest at June 30, 20211.6 $25.77 $7.8 5.27
Exercisable at June 30, 20211.4 $25.64 $7.2 4.98
Schedule of Restricted Stock Units and Restricted Stock Awards Roll Forward
Restricted Stock Awards and Restricted Stock Units (1)
Awards/Units
(millions)		Weighted-Average
Fair Value
Outstanding at January 1, 20211.0 $28.84 
Granted0.6 $28.75 
Vested(0.4)$29.06 
Forfeited(0.1)$29.05 
Outstanding at June 30, 20211.1 $28.69 
(1)    As of June 30, 2021, there are no restricted stock awards outstanding and only restricted stock units remain.
Schedule of Performance Stock Roll Forward
Performance Stock Awards and Performance Share Units (1)
Awards/Units
(millions)		Weighted-Average
Fair Value
Outstanding at January 1, 20210.5 $31.07 
Granted0.4 $29.53 
Vested— $— 
Forfeited(0.2)$31.85 
Outstanding at June 30, 20210.7 $30.11 
(1)    As of June 30, 2021, there are no performance stock awards outstanding and only performance share units remain.