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Common Stock (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Assumptions Used to Determine Fair Value


Assumptions	2013			2012			2011
Assumptions applicable to performance-based restricted stock
Risk-free interest rate		0.41	%		0.38	%		0.96	%
Expected lives (in years)		3			3			3
Expected stock volatility		19.04	%		20.99	%		34.61	%
Dividend yield		4.83	%		4.78	%		4.48	%

Schedule of Additional Information on Compensation Costs and Income Tax Benefits and Excess Tax Benefits Related to Stock-Based Compensation Awards

The following table provides additional information on compensation costs and income tax benefits and excess tax benefits related to the stock-based compensation awards.


(millions)	2013		2012		2011
Compensation costs ⁽¹⁾	$	13.5	$	12.0	$	9.1
Income tax benefits ⁽¹⁾		5.2		4.6		3.5
Excess tax benefits ⁽²⁾		0.0		2.6		1.7

(1)	Reflected on the Consolidated Statements of Income.

(2)	Reflected as financing activities on the Consolidated Statements of Cash Flows.

Summary of Non-Vested Shares of Restricted Stock

A summary of non-vested shares of restricted stock is shown as follows:


Nonvested Restricted Stock
	Time-Based Restricted					Performance-Based
	Stock ⁽¹⁾					Restricted Stock ⁽¹⁾
	Number of Shares (thousands)			Weighted - Avg. Grant Date Fair Value (per share)		Number of Shares (thousands)			Weighted- Avg. Grant Date Fair Value (per share)
Nonvested balance at Dec. 31, 2012		592		$	18.04		1,490		$	17.13
Granted		237			17.92		496			16.87
Vested		(187	)		16.91		(434	)		17.20
Forfeited		(4	)		17.99		(47	)		16.82

Nonvested balance at Dec. 31, 2013		638		$	18.33		1,505		$	17.04

(1)	The weighted-average remaining contractual term of restricted stock is two years.

Summary of Stock Option Transactions

Stock option transactions are summarized as follows:


Stock Options
	Number of Shares (thousands)			Weighted-Avg. Option Price (per share)		Weighted-Avg. Remaining Contractual Term (years)	Aggregate Intrinsic Value (millions)
Outstanding balance at Dec. 31, 2012		2,087		$	15.05
Granted		0			0.00
Exercised		(507	)		13.22
Cancelled		(13	)		18.87

Outstanding balance at Dec. 31, 2013 ⁽¹⁾		1,567		$	15.62	2	$	2.6
Exercisable at Dec. 31, 2013 ⁽¹⁾		1,567		$	15.62	2	$	2.6
Available for future grant at Dec. 31, 2013		2,725

(1)	Option prices range from $12.01 to $19.01 per share.

Schedule of Option Outstanding and Exercisable

As of Dec. 31, 2013, the options outstanding and exercisable are summarized below:


Range of Option Prices (per share)	Option Shares (thousands)		Weighted-Avg. Option Price (per share)		Weighted-Avg. Remaining Contractual Life
$12.01 - $13.56		331	$	13.10	1 Years
$16.21 - $19.01		1,236	$	16.29	2 Years

Total		1,567	$	15.62	2 Years

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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