Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Common stock, shares issued, beginning of period at Jun. 30, 2015		638.7
Stockholders' Equity, balance, beginning of period at Jun. 30, 2015		$ 63.9	$ 663.3	$ 13,460.3	$ (9,118.4)	$ (260.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 1,492.5		0.0		0.0	0.0
Other comprehensive income (loss)			0.0	0.0	0.0	45.5
Stock-based compensation expense			117.2	0.0	0.0	0.0
Issuances relating to stock compensation plans			(47.5)	0.0	182.5	0.0
Tax benefit from stock compensation plans			35.1	0.0	0.0	0.0
Treasury stock			0.0	0.0	(1,202.7)	0.0
Dividends, Stock			0.0	(955.7)	0.0	0.0
Common stock, shares issued, end of period at Jun. 30, 2016		638.7
Stockholders' Equity, balance, end of period at Jun. 30, 2016		$ 63.9	768.1	14,003.3	(10,138.6)	(215.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other			0.0	6.2	0.0	0.0
Net earnings	$ 1,733.4		0.0		0.0	0.0
Other comprehensive income (loss)			0.0	0.0	0.0	(164.1)
Stock-based compensation expense			115.5	0.0	0.0	0.0
Issuances relating to stock compensation plans			(15.8)	0.0	169.2	0.0
Treasury stock			0.0	0.0	(1,334.3)	0.0
Dividends, Stock			0.0	(1,008.5)	0.0	0.0
Common stock, shares issued, end of period at Jun. 30, 2017	638.7	638.7
Stockholders' Equity, balance, end of period at Jun. 30, 2017		$ 63.9	867.8	14,728.2	(11,303.7)	(379.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 1,620.8		0.0		0.0	0.0
Other comprehensive income (loss)			0.0	0.0	0.0	(259.3)
Stock-based compensation expense			145.3	0.0	0.0	0.0
Issuances relating to stock compensation plans			1.7	0.0	144.5	0.0
Treasury stock			0.0	0.0	(1,050.4)	0.0
Other (see Note 1)				(42.3)		42.3
Dividends, Stock			0.0	(1,120.0)	0.0	0.0
Common stock, shares issued, end of period at Jun. 30, 2018	638.7	638.7
Stockholders' Equity, balance, end of period at Jun. 30, 2018		$ 63.9	$ 1,014.8	$ 15,271.3	$ (12,209.6)	$ (680.8)