Share-Based Compensation (Tables)

The following table provides total share-based compensation expense by type of award:


	Three Months Ended September 30,
(in millions)	2021		2020
Restricted share unit expense	$	18	$	19
Employee stock option expense	—		—
Performance share unit expense	6		9
Total share-based compensation	$	24	$	28

The following table summarizes all stock option transactions under the Plans:


(in millions, except per share amounts)	Stock Options	Weighted-Average Exercise Price per Common Share
Outstanding at June 30, 2021	4	$	68.46
Granted	—	—
Exercised	—	—
Canceled and forfeited	—	—
Outstanding at September 30, 2021	4	$	69.31
Exercisable at September 30, 2021	4	$	69.48

The following tables provide additional detail related to stock options:


(in millions)	September 30, 2021		June 30, 2021
Aggregate intrinsic value of outstanding options at period end	$	3	$	11
Aggregate intrinsic value of exercisable options at period end	3		11


(in years)	September 30, 2021	June 30, 2021
Weighted-average remaining contractual life of outstanding options	4	4
Weighted-average remaining contractual life of exercisable options	4	4

The following table summarizes all transactions related to restricted share units under the Plans:


(in millions, except per share amounts)	Restricted Share Units	Weighted-Average Grant Date Fair Value per Share
Nonvested at June 30, 2021	3	$	49.05
Granted	1	51.71
Vested	(1)	48.83
Canceled and forfeited	—	—
Nonvested at September 30, 2021	3	$	50.67

The following table summarizes all transactions related to performance share units under the Plans (based on target award amounts):


(in millions, except per share amounts)	Performance Share Units	Weighted-Average Grant Date Fair Value per Share
Nonvested at June 30, 2021	1.2	$	54.89
Granted	0.5	51.91
Vested	(0.3)	52.36
Canceled and forfeited	—	—
Nonvested at September 30, 2021	1.4	$	51.31