Plant and Equipment, Net (Tables)

12 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Schedule of Major Classes of Plant and Equipment

The major classes of plant and equipment are as follows:

30 September	Useful Life in years	2017		2016
Land		$	231.0	$	202.9
Buildings	30	977.8		918.6
Production facilities(A)	10 to 20	13,577.1		12,391.9
Distribution and other machinery and equipment(B)	5 to 25	3,944.0		3,821.0
Construction in progress		817.9		1,325.8
Plant and equipment, at cost		19,547.8		18,660.2
Less: accumulated depreciation		11,107.6		10,400.5
Plant and equipment, net		$	8,440.2	$	8,259.7

^(A)  Depreciable lives of production facilities related to long-term customer supply contracts are matched to the contract lives.

^(B)  The depreciable lives for various types of distribution equipment are 10 to 25 years for cylinders, depending on the nature and properties of the product; 20 years for tanks; 7.5 years for customer stations; and 5 to 15 years for tractors and trailers.