Equity (Tables) - USD ($)
$ in Millions

3 Months Ended

12 Months Ended

Dec. 31, 2019

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated Other Comprehensive Loss, net of tax, is summarized by component as follows:

	December 31, 2019			December 31, 2018
Interest swaps	$	(0.6	)	$	—
Pension	$	(53.1	)	$	(116.7	)
SERP/ Retiree medical	17.1			17.2
Foreign currency impact on long term intercompany loan	(13.1		)	(17.4		)
Currency translation adjustment	(59.5		)	(79.7		)
Total accumulated other comprehensive loss	$	(109.2	)	$	(196.6	)

Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax

$ (3.7)

$ 0.3

$ 0.3

Accumulated Other Comprehensive Income (Loss)

$ (109.2)

(109.2)

(196.6)

Stock Repurchased During Period, Value

649.6

$ 75.8

800.0

Schedule Of Earnings Per Share, Basic And Diluted

Earnings per Share Calculation

Basic net income per share is computed using the weighted-average number of outstanding shares of Common Stock during the measurement period. Diluted net income per share is computed using the weighted-average number of outstanding shares of Common Stock and, when dilutive, potential outstanding shares of Common Stock during the measurement period.

The following table sets forth the computation of basic and diluted earnings per share:

	For the Twelve Months Ended
	December 31, 2019					December 31, 2018					December 31, 2017
	Income		Shares	Per Share Amount		Income		Shares	Per Share Amount		Loss		Shares	Per Share Amount
Basic EPS
Income available to common shareholders	$	529.7	103.6	$	5.11	$	616.5	108.0	$	5.71	$	354.7	116.8	$	3.04
Income allocated to participating securities	0.4		0.1			0.5		0.1			0.2		0.1
Net income	$	530.1				$	617.0				$	354.9
Diluted potential common shares			1.0					1.0					1.0
Diluted EPS
Net income	$	530.1	104.7	$	5.06	$	617.0	109.1	$	5.65	$	354.9	117.9	$	3.01

Included in the outstanding common shares were 1.4 million, 1.4 million and 1.5 million of issued but unvested shares at December 31, 2019, 2018 and 2017, respectively, which are excluded from the basic EPS calculation.

Accumulated Defined Benefit Plans Adjustment [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Income (Loss)

(53.1)

$ (53.1)

(116.7)

Accumulated SERP And Retiree Medical [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Income (Loss)

17.1

17.1

17.2

Foreign Currency Impact On Long Term Intercompany Loan [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Income (Loss)

(13.1)

(13.1)

(17.4)

Accumulated Translation Adjustment [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Income (Loss)

(59.5)

(59.5)

$ (79.7)

Accumulated Interest Rate Swaps

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Income (Loss)

$ (0.6)

$ (0.6)