Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | ||||
---|---|---|---|---|---|
Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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Jul. 22, 2013
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Feb. 24, 2015
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Statement of Stockholders' Equity | |||||
Dividends Per Common Share | $ 0.39 | $ 0.33 | |||
Preferred Stock, Shares Authorized | 10,000,000 | 10,000,000 | 10,000,000 | ||
Preferred Stock, Par or Stated Value Per Share | $ 0.01 | ||||
Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued | $ 0 | $ 0 | |||
Common Class C [Member] | |||||
Statement of Stockholders' Equity | |||||
Common Stock, Voting Rights | 1/100th | ||||
Common Class B [Member] | |||||
Statement of Stockholders' Equity | |||||
Common Stock, Par or Stated Value Per Share | $ 10,000.00 | ||||
Common Class D [Member] | |||||
Statement of Stockholders' Equity | |||||
Common Stock, Voting Rights | 1/100th | ||||
Common Class A [Member] | |||||
Statement of Stockholders' Equity | |||||
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 |