Pension And Other Retiree Benefits (Net Periodic Benefit Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jan. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to defined benefit plans for 2017			$ 19.8
Contributions by company to date			10.8
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.4	$ 0.3	0.7	$ 0.6
Interest cost	1.7	1.8	3.5	3.6
Expected return on plan assets	(3.0)	(3.0)	(6.1)	(6.0)
Amortization of net loss (gain)	0.5	0.5	1.0	1.0
Amortization of prior service cost	0.1	0.1	0.2	0.2
Net periodic benefit (income) cost	(0.3)	(0.3)	(0.7)	(0.6)
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.5	0.2	0.8	0.4
Interest cost	3.5	2.7	6.4	5.4
Expected return on plan assets	(5.6)	(4.6)	(10.5)	(9.2)
Amortization of net loss (gain)	0.8	0.6	1.5	1.2
Amortization of prior service cost	0.0	0.0	0.0	0.0
Net periodic benefit (income) cost	(0.8)	(1.1)	(1.8)	(2.2)
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.1	0.1	0.1	0.2
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of net loss (gain)	(0.1)	(0.1)	(0.2)	(0.2)
Amortization of prior service cost	0.0	0.0	0.0	0.0
Net periodic benefit (income) cost	$ 0.0	$ 0.0	(0.1)	$ 0.0
Esselte Group Holdings AB
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to defined benefit plans for 2017			$ 8.6
Pension obligations					$ 171.5
GERMANY | Esselte Group Holdings AB
Defined Benefit Plan Disclosure [Line Items]
Pension obligations					$ 133.7