Business Segment Information (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 1,765.9	$ 1,799.1	$ 2,084.5	$ 1,935.5	$ 1,628.0	$ 1,810.5	$ 2,021.2	$ 1,871.8	$ 7,585.0	$ 7,331.5	$ 6,548.4
Long-lived tangible assets	4,789.7				3,932.8				4,789.7	3,932.8	3,333.4
Geographical Components [Member] | U.S. [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									7,330.1	6,807.7	5,960.9
Long-lived tangible assets	1,124.5				1,037.6				1,124.5	1,037.6
Geographical Components [Member] | Non-U.S. [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									254.9	523.8	$ 587.5
Long-lived tangible assets	$ 3,665.2				$ 2,895.2				$ 3,665.2	$ 2,895.2