Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts
Changes in valuation allowances and reserves
Balance at beginning of year	$ 1.8	$ 1.2	$ 1.5
Charged to expenses/(recovery)		1.1
Deductions and other	(0.9)	(0.5)	(0.3)
Balance at end of year	0.9	1.8	1.2
Valuation allowance for deferred tax assets
Changes in valuation allowances and reserves
Balance at beginning of year	49.4	39.4	36.5
Charged to expenses/(recovery)	10.5	9.0	10.5
Deductions and other	(2.4)	1.0	(7.6)
Balance at end of year	$ 62.3	$ 49.4	$ 39.4