Stock-Based Compensation Nonvested Shares and Other (Details) (Common Shares, USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
2005 and 2013 Long-Term Incentive Plans \| Restricted Stock Units
Stock based compensation, Nonvested shares rollforward, number of shares
Nonvested stock units, begin of period - Number of shares	1,170,000
Granted number of shares	370,000
Vested number of shares	(274,000)
Forfeited number of shares	(124,000)
Nonvested stock units, end of period - Number of shares	1,142,000	1,170,000
Stock based compensation, Nonvested shares weighted average grant date fair value
Nonvested stock units - begin of period weighted average grant date fair value	$ 36.46
Granted weighted average grant date fair value	$ 41.24	$ 32.06	$ 34.09
Vested weighted average grant date fair value	$ 41.92
Forfeited weighted average grant date fair value	$ 34.38
Nonvested stock units - end of period weighted average grant date fair value	$ 35.60	$ 36.46
Fair value of vested stock units	$ 11.1	$ 8.8	$ 8.9
2005 and 2013 Long-Term Incentive Plans \| Deferred Compensation Stock Units
Stock based compensation, Nonvested shares weighted average grant date fair value
Granted weighted average grant date fair value		$ 31.50	$ 36.34
Fair value of vested stock units		$ 0.1	$ 0.1
Non-Employee Directors' Plan
Shares issued and granted under stock compensation plans
Shares issued	14,200	13,000	7,600

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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