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Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2013

Share-Based Compensation Plans

Schedule of stock option activity

Stock Options		Option Shares			Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (In years)			Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2010			3,880,052		$	44.76
Granted			1,037,250			55.73
Exercised			(266,392	)		41.60
Expired or forfeited			(135,350	)		47.57
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Outstanding at December 31, 2011			4,515,560			47.39
Exercised			(1,018,010	)		41.40
Expired or forfeited			(92,050	)		49.55
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Outstanding at December 31, 2012			3,405,500			49.12
Exercised			(1,437,053	)		48.78
Expired or forfeited			(31,206	)		51.37
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Outstanding at December 31, 2013			1,937,241		$	49.35			3.0		$	51.3
​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Exercisable at December 31, 2013			1,253,516		$	48.11			2.6		$	34.8
​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​

Schedule of weighted average assumptions for estimation of fair value of each option

		Year Ended December 31,
		2011
Weighted average assumptions used:
Exercise price		$	55.73
Risk free interest rate			2.20	%
Expected life in years			4.8
Expected volatility			60	%
Expected dividend yield			0.86	%
Grant date fair value		$	26.98

Summary of the status of the Company's non-vested stock options and service and performance RSU changes during the year

Non-vested Options		Shares			Weighted Average Grant Date Fair Value
Non-vested at January 1, 2013			1,377,113		$	23.21
Forfeited			(28,425	)	$	24.79
Vested			(664,963	)	$	21.37
​	​	​	​	​	​	​	​
Non-vested at December 31, 2013			683,725		$	24.93
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

Summary of certain information concerning outstanding and exercisable options

						Options Outstanding						Options Exercisable
Range of Exercise Price			Outstanding at December 31, 2013			Weighted Average Remaining Contractual Life in Years			Weighted Average Exercise Price			Exercisable at December 31, 2013			Weighted Average Exercise Price of Options Exercisable
	$15 - $19			18,000			1.4		$	18.31			18,000		$	18.31
	$24 - $28			11,231			1.5		$	25.18			11,231		$	25.18
	$33 - $38			207,425			2.7		$	34.28			207,425		$	34.28
	$42 - $45			609,460			3.2		$	43.07			391,310		$	43.21
	$55 - $57			1,037,125			3.1		$	56.08			571,550		$	56.37
	$61 - $67			54,000			3.9		$	64.08			54,000		$	64.08
	$15 - $67			1,937,241			3.0		$	49.35			1,253,516		$	48.11

Summary of the status of the Company's non-vested restricted stock and restricted stock units and changes during the year

Non-vested Shares		Shares			Weighted Average Grant Date Fair Value
Non-vested at January 1, 2013			496,450		$	53.44
Granted			340,198			65.82
Forfeited			(23,050	)		58.72
Vested			(41,818	)		47.45
​	​	​	​	​	​	​	​
Non-vested at December 31, 2013			771,780		$	59.06
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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Tabular disclosure of the changes in outstanding nonvested restricted stock and restricted stock units.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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