|
Shareholders' Equity And Net Income Per Share Share Repurchase Program (Details) (USD $)
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3 Months Ended |
1 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Apr. 29, 2015
|
Apr. 30, 2015
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| Share Repurchase Program [Line Items] |
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|
|
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| Stock Repurchased During Period, Shares |
3,233,146 |
2,376,391 |
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| Stock Repurchased, Average Price per Share |
$ 74.17 |
$ 66.14 |
|
|
| Stock Repurchased During Period, Value |
$ 240,000,000 |
$ 157,000,000 |
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| Share Repurchase Program January 2014 |
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| Share Repurchase Program [Line Items] |
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|
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| Stock Repurchase Program, Authorized Amount |
1,000,000,000 |
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|
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| Share Repurchase Program January 2015 |
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| Share Repurchase Program [Line Items] |
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|
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| Stock Repurchase Program, Authorized Amount |
1,500,000,000 |
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|
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| Stock Repurchase Program, Remaining Authorized Repurchase Amount |
1,426,000,000 |
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| Subsequent Event |
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| Share Repurchase Program [Line Items] |
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| Stock Repurchased During Period, Value |
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|
80,000,000 |
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| Subsequent Event | Share Repurchase Program January 2015 |
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|
|
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| Share Repurchase Program [Line Items] |
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|
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| Stock Repurchase Program, Remaining Authorized Repurchase Amount |
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$ 1,346,000,000 |