New Accounting Pronouncements Pension Restatement (Details) - USD ($) $ in Millions	3 Months Ended					6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Cost of Goods Sold	$ (1,739.1)			$ (1,755.5)		$ (3,274.8)	$ (3,127.8)
Selling, General and Administrative Expense	(744.7)			(782.4)		(1,425.8)	(1,487.7)
Special items	(10.5)			(16.5)		304.3	(23.2)
Operating Income (Loss)	$ 590.9			536.9		1,020.4	901.3
Other pension and postretirement benefits (costs), net				9.4		$ 19.9	22.7
Restatement Adjustment [Member]
Cost of Goods Sold		$ (1,514.7)	$ (1,584.1)	(1,750.7)	$ (1,367.7)
Selling, General and Administrative Expense		(775.9)	(779.2)	(777.8)	(699.5)
Special items		$ (3.7)	$ (4.1)	(16.5)	$ (3.8)
Restatement Adjustment [Member] | Corporate [Member]
Cost of Goods Sold				0.0			0.0
Selling, General and Administrative Expense				0.0			0.0
Special items							0.0
Other pension and postretirement benefits (costs), net				9.4			22.7
Income (loss) before income taxes				9.4			22.7
Restatement Adjustment [Member] | Europe [Member]
Cost of Goods Sold				6.7			13.3
Selling, General and Administrative Expense				4.6			9.3
Special items							0.0
Other pension and postretirement benefits (costs), net				0.0			0.0
Income (loss) before income taxes				(11.3)			(22.6)
Restatement Adjustment [Member] | UNITED STATES
Cost of Goods Sold				(1.8)			(3.6)
Selling, General and Administrative Expense				0.0			0.8
Special items							0.0
Other pension and postretirement benefits (costs), net				0.0			0.0
Income (loss) before income taxes				1.8			2.8
Restatement Adjustment [Member] | Canada [Member]
Cost of Goods Sold				(0.1)			(0.3)
Selling, General and Administrative Expense				0.0			0.3
Special items							2.9
Other pension and postretirement benefits (costs), net				0.0			0.0
Income (loss) before income taxes				0.1			(2.9)
Previous Accounting Guidance [Member]
Cost of Goods Sold				(1,750.7)			(3,118.4)
Selling, General and Administrative Expense				(777.8)			(1,477.3)
Special items							(20.3)
Operating Income (Loss)				546.3			924.0
Other pension and postretirement benefits (costs), net				$ 0.0			$ 0.0