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Shareholders' Equity And Net Income Per Share Dividends (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
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Mar. 31, 2015
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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| Shareholders' Equity and Net Income Per Share Note [Abstract] | |||||||
| Cash dividends per share | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 1.00 | $ 0.68 |
| Payments of Cash Dividends | $ 73 | $ 73 | $ 75 | $ 76 | $ 77 | $ 301 | |