Short-Term Financing (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015		Jun. 30, 2014
Short-term Debt [Line Items]
Credit agreement period		364 days
Maturities of commercial paper range		overnight to up to 364 days
Commercial Paper		$ 0.0	[1]	$ 2,173.0
Maturities of short-term funding agreements		overnight to up to five business days
Obligations under reverse repurchase agreements		$ 0.0
364-Day Credit Agreement [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 2,750.0
Expiration date of credit facilities		Jun. 16, 2016
Outstanding borrowings		$ 0.0
Commercial Paper [Member]
Short-term Debt [Line Items]
Debt Instrument, Description		7500
Credit Facility Expiring In June 2015 [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 3,250.0
Term of credit		5 years
Expiration date of credit facilities		Jun. 18, 2019
Line of credit facility potentially available increase in maximum borrowing capacity		$ 500.0
Credit Facility Expiring In June 2018 [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 2,250.0
Term of credit		5 years
Expiration date of credit facilities		Jun. 17, 2020
Line of credit facility potentially available increase in maximum borrowing capacity		$ 500.0
Short-Term Commercial Paper Program [Member]
Short-term Debt [Line Items]
Outstanding borrowings
Average outstanding borrowings		$ 2,300.0		$ 2,300.0
Weighted average interest rates		0.10%		0.10%
Weighted average maturity of borrowings under the short-term commercial paper program		2 days		2 days
Reverse Repurchase Agreements [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 3,250.0
Outstanding borrowings
Average outstanding borrowings		$ 421.2		$ 361.7
Weighted average interest rates		0.40%		0.50%
Subsequent Event [Member] | Commercial Paper [Member]
Short-term Debt [Line Items]
Debt Instrument, Description	8250

[1] (A) As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 8).