Financial Information for Subsidiary and Guarantor Parent (Comp Inc.) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
StatementOfIncomeAndComprehensiveIncomeAbstract
Net income (loss)	$ 167.8	$ 223.1	$ 78.7
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	14.3	2.7	(5.4)
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	(0.1)	0
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	(2.8)	3.8	(7.2)
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	97.4	277.1	(24.2)
Other Comprehensive Income Loss Net Of Tax	(85.9)	(270.7)	11.6
Comprehensive income (loss)	81.9	(47.6)	90.3
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11.3	14.6	11.2
Comprehensive Income Net Of Tax	70.6	(62.2)	79.1
Guarantor Parent
StatementOfIncomeAndComprehensiveIncomeAbstract
Net income (loss)	167.8	223.1	78.7
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	14.3	2.7	(5.4)
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	(0.1)	0
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	(2.8)	3.8	(7.2)
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	97.4	277.1	(24.2)
Other Comprehensive Income Loss Net Of Tax	(85.9)	(270.7)	11.6
Comprehensive income (loss)	81.9	(47.6)	90.3
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	0	0
Comprehensive Income Net Of Tax	81.9	(47.6)	90.3
Subsidiary
StatementOfIncomeAndComprehensiveIncomeAbstract
Net income (loss)	41.5	108.2	37.6
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	0	0
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	0	0
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	0	0
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	18.1	32.9	12.8
Other Comprehensive Income Loss Net Of Tax	(18.1)	(32.9)	(12.8)
Comprehensive income (loss)	23.4	75.3	24.8
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	0	0
Comprehensive Income Net Of Tax	23.4	75.3	24.8
Non Guarantor Subsidiaries
StatementOfIncomeAndComprehensiveIncomeAbstract
Net income (loss)	274.7	291.0	175.8
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	14.3	2.7	(5.4)
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	(0.1)	0
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	0	0
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	5.1	20.9	0.5
Other Comprehensive Income Loss Net Of Tax	9.2	(18.3)	(5.9)
Comprehensive income (loss)	283.9	272.7	169.9
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11.3	14.6	11.2
Comprehensive Income Net Of Tax	272.6	258.1	158.7
Eliminations
StatementOfIncomeAndComprehensiveIncomeAbstract
Net income (loss)	(316.2)	(399.2)	(213.4)
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(14.3)	(2.7)	5.4
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	0.1	0
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	0	0
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	(23.2)	(53.8)	(13.3)
Other Comprehensive Income Loss Net Of Tax	8.9	51.2	18.7
Comprehensive income (loss)	(307.3)	(348.0)	(194.7)
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	0	0
Comprehensive Income Net Of Tax	$ (307.3)	$ (348.0)	$ (194.7)