Special items Severance and Other Employee Related (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Changes in restructuring accruals [Roll Forward]
Restructuring Reserve, Accrual Adjustment	$ (1.2)
Canada [Member]
Changes in restructuring accruals [Roll Forward]
Restructuring Reserve, Accrual Adjustment	0
Europe [Member]
Changes in restructuring accruals [Roll Forward]
Restructuring Reserve, Accrual Adjustment	(1.2)
MCI [Member]
Changes in restructuring accruals [Roll Forward]
Restructuring Reserve, Accrual Adjustment	0
Corporate [Member]
Changes in restructuring accruals [Roll Forward]
Restructuring Reserve, Accrual Adjustment	0
Severance and other employee-related costs [Member]
Changes in restructuring accruals [Roll Forward]
Beginning balance of restructuring accruals	15.5	24.7
Charges incurred	0	(5.8)
Payments made	(2.2)	(4.5)
Foreign currency and other adjustments	(0.9)	(0.2)
Ending balance of restructuring accruals	11.2	25.8
Severance and other employee-related costs [Member] \| Canada [Member]
Changes in restructuring accruals [Roll Forward]
Beginning balance of restructuring accruals	3.8	9.7
Charges incurred	0	(5.3)
Payments made	(1.4)	(3.6)
Foreign currency and other adjustments	(0.3)	(0.4)
Ending balance of restructuring accruals	2.1	11.0
Severance and other employee-related costs [Member] \| Europe [Member]
Changes in restructuring accruals [Roll Forward]
Beginning balance of restructuring accruals	11.5	13.6
Charges incurred	0	(0.5)
Payments made	(0.6)	(0.6)
Foreign currency and other adjustments	(0.6)	0.2
Ending balance of restructuring accruals	9.1	13.7
Severance and other employee-related costs [Member] \| MCI [Member]
Changes in restructuring accruals [Roll Forward]
Beginning balance of restructuring accruals	0	0.5
Charges incurred	0	0
Payments made	0	(0.1)
Foreign currency and other adjustments	0	0
Ending balance of restructuring accruals	0	0.4
Severance and other employee-related costs [Member] \| Corporate [Member]
Changes in restructuring accruals [Roll Forward]
Beginning balance of restructuring accruals	0.2	0.9
Charges incurred	0	0
Payments made	(0.2)	(0.2)
Foreign currency and other adjustments	0	0
Ending balance of restructuring accruals	$ 0	$ 0.7
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Payment of severance obligations, term	12 months
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Payment of severance obligations, term	21 months

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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