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Share and Unit-Based Plans - SARs (Details) (USD $) | 9 Months Ended
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Sep. 30, 2014
SARs |  |
SARs (in shares) |  |
Balance at beginning of period | 1,070,991 |
Granted | 0 |
Exercised | (54,082) |
Forfeited | 0 |
Balance at end of period | 1,016,909 |
Value (in dollars per share) |  |
Balance at beginning of period | $ 56.66 | [1]
Granted | $ 0.00 | [1]
Exercised | $ 56.63 | [1]
Forfeited | $ 0.00 | [1]
Balance at end of period | $ 56.66 | [1]
Stock options |  |
Stock Options (in shares) |  |
Balance at beginning of period | 10,068 |
Granted | 0 |
Exercised | 0 |
Forfeited | 0 |
Balance at end of period | 10,068 |
Value (in dollars per share) |  |
Balance at beginning of period | $ 59.57 | [1]
Granted | $ 0.00 | [1]
Exercised | $ 0.00 | [1]
Forfeited | $ 0.00 | [1]
Balance at end of period | $ 59.57 | [1]
[1] | Value represents the weighted average exercise price.

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- Definition Represents the weighted average fair value of options exercised. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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). + 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)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-option equity instruments exercised by participants. + 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)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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