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Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option Award Activity

The following table presents a summary of our stock option award activity for the three months ended March 31, 2017:

	Number of Shares			Weighted Average Exercise Price
Outstanding at December 31, 2016	9,531,440			$	28.93
Granted	726,061			50.99
Exercised	(463,376	)		22.45
Forfeited, canceled or expired	(45,795	)		41.54
Outstanding at March 31, 2017	9,748,330			30.82

Summary of Restricted Stock Award Activity

The following table presents a summary of restricted stock award activity for the three months ended March 31, 2017:

	Shares of Restricted Stock (“RS”)							Restricted Stock Units (“RSU”)
	Number of Shares			Weighted Average Grant Date Fair Value				Number of Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2016	1,250,343			$	41.51			361,117			$	28.26
Granted	115,017			50.60				9,046			52.05
RS’s Vested/RSU’s Issued	(101,913	)		40.99				—			—
Forfeited	(29,316	)		41.16				—			—
Outstanding at March 31, 2017	1,234,131			42.40				370,163			28.84

Schedule of Performance Unit Awards

The following table presents a summary of the activity for performance unit awards to be settled in shares for the three months ended March 31, 2017:

	Number of Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2016	6,255,178			$	0.78
Granted	2,584,750			0.92
Exercised	(1,854,728	)		0.85
Canceled	—			—
Outstanding at March 31, 2017	6,985,200			0.81

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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