Debt (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020		Aug. 13, 2020	Jun. 30, 2020
Debt Instrument [Line Items]
Debt instrument, term	10 years
Aggregate principal amount	$ 2,000,000,000.0
Notes payable	2,008,200,000			$ 2,008,400,000
Derivative, notional amount	1,000,000,000.0		$ 600,000,000.0	400,000,000.0
Unrealized loss on cash flow hedging instruments	43,600,000
Less: current portion	(1,800,000)	[1]		(1,001,800,000)
Less: unamortized discount and debt issuance costs	(12,500,000)			(3,800,000)
Total long-term debt	1,993,900,000			1,002,800,000
Fair value of notes issued	2,115,000,000.0
Fixed-rate 2.250% notes due September 15, 2020
Debt Instrument [Line Items]
Notes payable	0			$ 1,000,000,000.0
Debt instrument effective rate (percent)				2.37%
Stated interest rate				2.25%
Fixed-rate 3.375% notes due September 15, 2025
Debt Instrument [Line Items]
Notes payable	$ 1,000,000,000.0			$ 1,000,000,000.0
Debt instrument effective rate (percent)	3.47%
Stated interest rate	3.375%
Fixed-rate 1.250% notes due September 1, 2030
Debt Instrument [Line Items]
Notes payable	$ 1,000,000,000.0			0
Debt instrument effective rate (percent)	1.83%
Stated interest rate	1.25%
Other
Debt Instrument [Line Items]
Notes payable	$ 8,200,000			$ 8,400,000

[1] (a) - Current portion of long-term debt as of September 30, 2020 is included within Accrued expenses and other current liabilities on the Consolidated Balance Sheets.