Debt (Narrative) (Details) In Millions, unless otherwise specified	6 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended				3 Months Ended		1 Months Ended		3 Months Ended	1 Months Ended
	Nov. 23, 2014 USD ($)	Nov. 24, 2013 USD ($)	Oct. 31, 2014 1.4% Notes Due October 2017 Member USD ($)	Nov. 23, 2014 1.4% Notes Due October 2017 Member	Oct. 31, 2014 2.2% Notes Due October 2019 Member USD ($)	Nov. 23, 2014 2.2% Notes Due October 2019 Member	Jun. 30, 2014 2.2% Senior Unsecured Notes Due June 2021 Member EUR (€)	May 31, 2014 Floating Rate Notes Due May 2014 [Member] USD ($)	May 31, 2014 1.55% Notes Due May 2014 Member USD ($)	Jan. 31, 2014 3.65% Notes Due February 2024 Member USD ($)	Feb. 23, 2014 3.65% Notes Due February 2024 Member USD ($)	Nov. 23, 2014 3.65% Notes Due February 2024 Member	Jan. 31, 2014 Floating Rate Notes Due January 28, 2016 Member USD ($)	Nov. 30, 2013 2.1% Notes Due November 2020 Member EUR (€)	Nov. 24, 2013 2.1% Notes Due November 2020 Member EUR (€)	Oct. 31, 2013 Floating Rate Notes Due January 29, 2016 Member USD ($)	Jan. 31, 2013 Floating Rate Notes Due January 29, 2016 Member USD ($)	Aug. 31, 2013 5.25% Notes Due August 2013 Member USD ($)
Debt Instrument [Line Items]
Issuance of long-term debt	$ 1,274.5	$ 923.0	$ 500.0		$ 500.0		€ 200.0			$ 500.0	$ 500.0		$ 250.0	€ 500.0	€ 500.0	$ 250.0	$ 250.0
Repayment of long-term debt	$ 393.3	$ 720.3						$ 400.0	$ 300.0									$ 700.0
Debt Instrument, Interest Rate, Stated Percentage			1.40%	1.40%	2.20%	2.20%	2.20%		1.55%	3.65%		3.65%		2.10%				5.25%
Debt instrument, variable rate basis													three-month LIBOR			three-month LIBOR	three-month LIBOR
Debt instrument spread on variable rate													0.20%			0.30%	0.30%