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Share-Based Compensation Weighting for Components of Performance Based RSU Awards (Details) (PLC Long Term Incentive Plan [Member])
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1 Months Ended | 0 Months Ended | ||||||||||
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Feb. 28, 2014
2014 Grant [Member]
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Feb. 28, 2013
2013 Grant [Member]
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Feb. 15, 2012
2012 Grant [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||
| Average Return on Net Assets (1) | 50.00% | [1] | 50.00% | [1] | 50.00% | [1] | ||||||
| Cumulative Net Income | 30.00% | |||||||||||
| Cumulative Earnings Per Share (2) | 30.00% | [2] | 30.00% | [2] | ||||||||
| Relative Total Shareholder Return (3) | 20.00% | [3] | 20.00% | [3] | 20.00% | [3] | ||||||
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