Shareholders' Equity Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax expense for gains on derivative financial instruments	$ 2.0
Income tax provision	0.4		1.3
Selling, general and administrative	0.3		0.3
Accumulated Other Comprhensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of year	(74.2)
Other comprehensive (loss) income before reclassifications, net of tax	(1.4)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	(0.9)
Net current-period other comprehensive income (loss)	(2.3)
Accumulated other comprehensive income (loss), net of tax, end of year	(76.5)
Defined Benefit Plans
Accumulated Other Comprhensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of year	(27.8)
Other comprehensive (loss) income before reclassifications, net of tax	0	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	0.4
Net current-period other comprehensive income (loss)	0.4
Accumulated other comprehensive income (loss), net of tax, end of year	(27.4)
Foreign Currency Translation
Accumulated Other Comprhensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of year	(49.1)
Other comprehensive (loss) income before reclassifications, net of tax	(4.2)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	0
Net current-period other comprehensive income (loss)	(4.2)
Accumulated other comprehensive income (loss), net of tax, end of year	(53.3)
(Gains) Losses on cash flow hedges
Accumulated Other Comprhensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of year	2.7
Other comprehensive (loss) income before reclassifications, net of tax	2.8	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	(1.3)
Net current-period other comprehensive income (loss)	1.5
Accumulated other comprehensive income (loss), net of tax, end of year	4.2
Reclassification out of Accumulated Other Comprehensive Income
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification for the period, net of tax	(0.9)
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Plans
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax provision	0
Reclassification for the period, net of tax	0.4
Selling, general and administrative	0.4
Reclassification out of Accumulated Other Comprehensive Income | (Gains) Losses on cash flow hedges
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of sales	(2.1)
Income tax provision	0.8
Reclassification for the period, net of tax	$ (1.3)

[1] Income tax expense of $2.0 million was recorded for gains on derivative financial instruments for the three months ended March 31, 2013.