Summary of Significant Accounting Policies Discussion (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Impacts of 2016-02 [Table Text Block]

The most significant impact was the recognition of ROU assets and lease liabilities for operating leases upon adoption, as set forth in the table below. The Company's accounting for finance leases remained unchanged.

	Adoption of ASU 2016-02 January 1, 2019
	(Dollars in millions)
ASSETS
Operating lease right-of-use assets	$	109.3
Total assets	$	109.3
LIABILITIES
Accounts payable and accrued expenses	$	41.8
Total current liabilities	41.8
Operating lease liabilities, less current portion	67.5
Total liabilities	$	109.3

Estimated useful life of plant and equipment

The estimated useful lives by category of assets are as follows:

	Years
Building and improvements	up to 29
Machinery and equipment	1 - 15
Leasehold improvements	Shorter of Useful Life or Remaining Life of Lease