Share-Based Compensation (Schedule of All Transactions Related to Restricted Share Units Under the Plans) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 17.0		$ 17.0
Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	3.0	$ 4.0	67.0	$ 66.0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 79.0		$ 79.0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years
Restricted Share Units
Nonvested at beginning of period (in shares)			1.7
Granted (in shares)			0.7
Vested (in shares)			(0.9)
Canceled and forfeited (in shares)			(0.1)
Nonvested at end of period (in shares)	1.4		1.4
Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period (in usd per share)			$ 70.98
Granted (in usd per share)			108.20
Vested (in usd per share)			71.74
Canceled and forfeited (in usd per share)			93.05
Nonvested at end of period (in usd per share)	$ 85.45		$ 85.45