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Earnings Per Share (Narrative) (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Stock repurchase plan, authorized amount | 500,000,000 | |||
| Aggregate shares repurchased under stock repurchase plan (in shares) | 9,593,278 | |||
| Stock purchase value | 441,443,000 | |||
| Stock Repurchased During Period, Value | 206,000 | 19,325,000 | ||
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Stock Options And Service-Based Restricted Stock Units [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Anti-dilutive securities excluded from computation of earnings per share, number of shares | 923,275 | 515,712 | 932,362 | 364,811 |
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Performance-Based Restricted Stock Units [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Anti-dilutive securities excluded from computation of earnings per share, number of shares | 40,304 | 38,606 | 38,259 | 33,047 |
| X | ||||||||||
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- Definition
Equity impact of the value of stock that has been repurchased to date and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. No definition available.
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- Definition
Number of shares that have been repurchased to date under the program. No definition available.
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount authorized by an entity's Board of Directors under a stock repurchase plan. No definition available.
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