Pensions and Postretirement Benefits Other Than Pensions (Schedule of Pretax Amounts Recognized in Accumulated Other Comprehensive Income or (Loss)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other comprehensive income loss pension and other postretirement benefits settlements and curtailments reclassified to earnings	$ 0	$ (0.1)	$ 2.7
UNITED STATES | Pension Plans [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	(39.0)	28.5
Balance at December 31, 2011	(50.4)	(83.1)
Balance at December 31, 2012	(86.4)	(50.4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	3.0	4.4
Defined Benefit Plan, Plan Amendments		(1.7)
Defined Benefit Plan, Other Costs		1.5
UNITED STATES | Pension Plans [Member] | Prior Service Cost [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	0	(2.3)
Balance at December 31, 2011	(4.2)	(2.0)
Balance at December 31, 2012	(3.5)	(4.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.7	0.6
Defined Benefit Plan, Plan Amendments		0
Defined Benefit Plan, Other Costs		(0.5)
UNITED STATES | Pension Plans [Member] | Net Actuarial Losses [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	(39.0)	30.8
Balance at December 31, 2011	(46.2)	(81.1)
Balance at December 31, 2012	(82.9)	(46.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	2.3	3.8
Defined Benefit Plan, Plan Amendments		(1.7)
Defined Benefit Plan, Other Costs		2.0
UNITED STATES | Pension Plans [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	28.4	(0.3)
Balance at December 31, 2011	(109.5)	(69.5)
Balance at December 31, 2012	(73.4)	(109.5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	2.9	1.9
Defined Benefit Plan, Plan Amendments		(39.6)
Defined Benefit Plan, Other Costs	4.8	(1.9)
Other comprehensive income loss pension and other postretirement benefits settlements and curtailments reclassified to earnings		(0.1)
UNITED STATES | Pension Plans [Member] | Prior Service Cost [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	0.3	0
Balance at December 31, 2011	(0.3)	(0.5)
Balance at December 31, 2012	0.1	(0.3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.1	0.1
Defined Benefit Plan, Plan Amendments		0
Defined Benefit Plan, Other Costs	0	0.1
Other comprehensive income loss pension and other postretirement benefits settlements and curtailments reclassified to earnings		0
UNITED STATES | Pension Plans [Member] | Net Actuarial Losses [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	28.1	(0.3)
Balance at December 31, 2011	(109.2)	(69.0)
Balance at December 31, 2012	(73.5)	(109.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	2.8	1.8
Defined Benefit Plan, Plan Amendments		(39.6)
Defined Benefit Plan, Other Costs	4.8	(2.0)
Other comprehensive income loss pension and other postretirement benefits settlements and curtailments reclassified to earnings		$ (0.1)