Schedule II (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Deferred tax asset valuation allowances - state and foreign net deferred tax assets					$ 36.6
Allowance for Losses on Receivables [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	38.0		47.7		41.7
Charges to Profit and Loss	(3.2)		3.3		49.7
Write-offs	(6.8)		(10.6)		(44.9)
Recoveries	0.4		2.1		0.5
Other	2.6		(4.5)		0.7
Balance, end of period	31.0		38.0		47.7
Deferred Tax Asset Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	722.5		637.3		493.1
Charges to Profit and Loss	(1.3)	[1]	79.0	[1]	149.6	[1]
Write-offs	(12.2)		(3.6)		(2.6)
Recoveries	0.4		0		0
Other	42.7	[1]	9.8	[1]	(2.8)	[1]
Balance, end of period	$ 752.1		$ 722.5		$ 637.3

[1] For the year ended December 31, 2011, the deferred tax asset valuation allowance increased as a result of pension remeasurement, which is recorded in Accumulated other comprehensive loss, and tax credits for which no tax benefit could be recorded. For the year ended December 31, 2010, the deferred tax asset valuation allowance increased as a result of additional tax losses and tax credits for which no tax benefit could be recorded. For the year ended December 31, 2009, the deferred tax asset valuation allowance increased as a result of additional losses and the recording of an additional $36.6 million in deferred tax asset valuation allowances during the first quarter of 2009 to reduce certain state and foreign net deferred tax assets to their anticipated realizable value.