Financial Instruments - Forward Starting Derivatives (Details) - Designated As Hedges: - Forward Interest Rate Swap	Jun. 30, 2021 USD ($)
Derivative [Line Items]
Amount Hedged	$ 1,575,000,000
Unsecured Senior Notes In Fiscal 2022
Derivative [Line Items]
Amount Hedged	$ 600,000,000
Effective Interest Rate	1.53%
Unsecured Senior Notes In Fiscal 2023
Derivative [Line Items]
Amount Hedged	$ 400,000,000
Effective Interest Rate	1.56%
Unsecured Senior Notes In Fiscal 2024
Derivative [Line Items]
Amount Hedged	$ 75,000,000
Effective Interest Rate	2.19%
Unsecured Senior Notes In Fiscal 2025
Derivative [Line Items]
Amount Hedged	$ 400,000,000
Effective Interest Rate	1.56%
Unsecured Senior Notes In Fiscal 2026
Derivative [Line Items]
Amount Hedged	$ 100,000,000
Effective Interest Rate	2.21%