Components of Changes in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts loss (gain) reclassified to consolidated statement of income	[1]	$ (14.5)	[2]	$ 0.1	$ (2.2)
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts loss (gain) reclassified to consolidated statement of income	[1]	(11.9)	[2]	$ 0.0	$ (5.2)
Defined Benefit Plans | Selling, General and Administrative Expenses
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts loss (gain) reclassified to consolidated statement of income		$ (11.9)

[1] Amounts reclassified to cost of sales or selling, general and administrative expenses.

[2] In connection with the termination of international defined benefit pension plans, $11.9 was reclassified to SG&A.  All other amounts were reclassified to Cost of Sales