Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of the Activity in the LIFO Reserve

The following table presents the activity in our LIFO reserve for each of the periods presented:

	Year Ended December 31
	2018		2017			2016
Balance, beginning of year	$	50.9	$	33.8		$	22.6
LIFO expense	31.3		18.6			10.5
Allocated to divested businesses	—		(1.5		)	.7
Balance, end of year	$	82.2	$	50.9		$	33.8

Schedule Of Property, Plant And Equipment

The table below presents the depreciation periods of the estimated useful lives of our property, plant and equipment. Accelerated methods are used for tax purposes.

	Useful Life Range	Weighted Average  Life
Machinery and equipment	3-20 years	10 years
Buildings	10-40 years	27 years
Other items	3-15 years	9 years

Summary Of Other Intangible Assets

	Useful Life Range	Weighted Average  Life
Other intangible assets	1-40 years	14 years