Borrowings (Schedule of Senior notes) (Parenthetical) (Details) - Senior notes	9 Months Ended
	Mar. 31, 2019
3.666% senior notes due 2022
Debt Instrument [Line Items]
Stated interest rate of debt instrument	3.666%
Senior notes, maturity year	2022
4.030% senior notes due 2024
Debt Instrument [Line Items]
Stated interest rate of debt instrument	4.03%
Senior notes, maturity year	2024
4.709% senior notes due 2029
Debt Instrument [Line Items]
Stated interest rate of debt instrument	4.709%
Senior notes, maturity year	2029
5.476% senior notes due 2039
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.476%
Senior notes, maturity year	2039
5.576% senior notes due 2049
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.576%
Senior notes, maturity year	2049