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Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended						3 Months Ended		12 Months Ended		3 Months Ended		3 Months Ended													3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Mar. 31, 2014 Revolving Credit Facility [Member]	Mar. 31, 2014 Secured Debt [Member] Loans Payable [Member]	Dec. 31, 2013 Secured Debt [Member] Loans Payable [Member]	Dec. 31, 2013 Secured Debt [Member] 9.25% Notes [Member]	Mar. 31, 2014 Secured Debt [Member] 9.25% Notes [Member]	Mar. 31, 2014 Unsecured Debt [Member] 5.125% Notes [Member]	Dec. 31, 2013 Unsecured Debt [Member] 5.125% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 31, 2014 Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 31, 2014 Unsecured Debt [Member] 7.75% Notes [Member]	Dec. 31, 2013 Unsecured Debt [Member] 7.75% Notes [Member]	Mar. 31, 2014 Unsecured Debt [Member] 6.625% Notes [Member]	Dec. 31, 2013 Unsecured Debt [Member] 6.625% Notes [Member]	Mar. 31, 2014 Unsecured Debt [Member] 6.25% Notes [Member]	Dec. 31, 2013 Unsecured Debt [Member] 6.25% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 6.25% Notes [Member]	Mar. 31, 2014 Foreign Credit Facilities [Member]	Dec. 31, 2013 Foreign Credit Facilities [Member]	Mar. 31, 2014 Capital Lease Obligations [Member]	Dec. 31, 2013 Capital Lease Obligations [Member]	Mar. 31, 2013 Class C [Member] Revolving Credit Facility [Member]	Mar. 20, 2013 Class C [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Loans Payable [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Loans Payable [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 5.125% Notes [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 5.125% Notes [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 7.75% Notes [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 7.75% Notes [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 6.625% Notes [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 6.625% Notes [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 6.25% Notes [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] 6.25% Notes [Member]
Debt Instrument [Line Items]
Long-term debt				$ 0	$ 0		$ 148.1	$ 150.0			$ 200.0	$ 200.0			$ 200.0	$ 200.0	$ 550.0	$ 550.0	$ 400.0	$ 400.0	$ 400.0	$ 75.1	$ 53.8	$ 5.2	$ 5.3			$ 0	$ 0	$ 148.1	$ 150.0	$ 200.0	$ 200.0	$ 200.0	$ 200.0	$ 550.0	$ 550.0	$ 400.0	$ 400.0
Long-term debt	1,578.4		1,559.1
Line of credit facility, maximum borrowing capacity						523.5
Line of credit facility, remaining borrowing capacity						501.7
Line of credit facility, standby letters of credit issued against the facility						21.8
Debt instrument, periodic payment, principal							1.9
Line of credit facility, reduction in borrowing capacity, termination of loan facility																											72.8
Write off of deferred debt issuance cost																										0.5
Debt instrument, interest rate, stated percentage										9.25%	5.125%			7.875%	7.75%		6.625%		6.25%
Debt instrument, redemption amount									190.0
Payments of debt issuance costs	0.2	6.2									0.2
Debt instrument, decrease, repayments													300.0
Debt instrument, tender and redemption premiums													8.5
Debt instrument, tender offer, fees													0.2
Other expense - Debt refinancing and redemption costs	0	11.3											2.1
Debt instrument, unused borrowing capacity, amount																						$ 19.8
Long-term debt, weighted average interest rate	6.30%		6.30%

X

- Definition

Face (par) amount of the original debt instrument that was redeemed.

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- Definition

Represents the amount of premiums associated with the purchase and redemption of long-term debt.

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- Definition

Represents expense recorded during the period for professional and underwriting fees related to a cash tender offer to purchase outstanding notes.

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- Definition

Represents a reduction in maximum borrowing capacity associated with a line of credit facility due to the termination of one or more tranches within the line of credit facility.

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- Definition

The amount of total standby letters of credit issued against the revolving credit facility at the reporting date, which represents a reduction of the available borrowing capacity.

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The amount of deferred financing costs and debt discounts related to a debt refinancing and/or redemption that were written off during the period, including early redemption premiums and fees.

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Amount of the required periodic payments applied to principal.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Weighted average interest rate of long-term debt outstanding.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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