Income From Continuing Operations Per Unrestricted Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

A reconciliation of the numerator and denominator used in the calculation of Basic Income from Continuing Operations Per Unrestricted Share and Diluted Income from Continuing Operations Per Unrestricted Share for the years endedDecember 31, 2017, 2016 and 2015 is presented below.

	2017		2016			2015
DOLLARS IN MILLIONS
Income from Continuing Operations	$	119.9	$	12.7		$	80.2
Less Income (Loss) from Continuing Operations Attributed to Participating Awards	0.8		(0.2		)	0.4
Income from Continuing Operations Attributed to Unrestricted Shares	119.1		12.9			79.8
Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—		—			—
Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	119.1	$	12.9		$	79.8
SHARES IN THOUSANDS
Weighted-average Unrestricted Shares Outstanding	51,345.6		51,156.1			51,606.9
Equity-based Compensation Equivalent Shares	232.3		58.6			76.6
Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	51,577.9		51,214.7			51,683.5
PER UNRESTRICTED SHARE IN WHOLE DOLLARS
Basic Income from Continuing Operations Per Unrestricted Share	$	2.32	$	0.25		$	1.55
Diluted Income from Continuing Operations Per Unrestricted Share	$	2.31	$	0.25		$	1.55

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

SHARES IN THOUSANDS	2017	2016	2015
Equity-based Compensation Equivalent Shares	346.6	959.9	959.7
Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	346.6	959.9	959.7