Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2018		Jun. 30, 2018
Statement of Financial Position [Abstract]
Commercial Paper	$ 1,206,000,000	[1]	$ 0
Allowance for doubtful accounts - trade receivables - Current	51,200,000		51,300,000
Allowance for doubtful accounts - trade receivables - Long-term	$ 500,000		$ 500,000
Preferred stock, par value (in US$ per share)	$ 1		$ 1
Preferred stock, shares authorized (in shares)	300,000		300,000
Preferred stock, shares issued (in shares)	0		0
Common stock, par value (in US$ per share)	$ 0.1		$ 0.1
Common stock, shares authorized (in shares)	1,000,000,000		1,000,000,000
Common stock, shares issued (in shares)	638,700,000		638,700,000
Common stock, shares outstanding (in shares)	436,200,000		438,800,000
Treasury stock, (in shares)	202,500,000		199,900,000

[1] As of December 31, 2018, $1,206.0 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 10).