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Financing Arrangements (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 9 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2011
3.375% Senior Notes due September 15, 2021
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Sep. 30, 2013
3.375% Senior Notes due September 15, 2021
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Dec. 31, 2012
3.375% Senior Notes due September 15, 2021
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Sep. 30, 2013
3.375% Senior Notes due September 15, 2021
Change of control triggering event
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Feb. 29, 2004
1.5% Convertible Senior Notes due February 15, 2024
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Sep. 30, 2013
1.5% Convertible Senior Notes due February 15, 2024
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Sep. 30, 2012
1.5% Convertible Senior Notes due February 15, 2024
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Dec. 31, 2012
1.5% Convertible Senior Notes due February 15, 2024
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Sep. 30, 2013
1.5% Convertible Senior Notes due February 15, 2024
Maximum
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| Financing Arrangements | |||||||||
| Issue price of notes | $ 500 | $ 330 | |||||||
| Debt instrument interest rate (as a percent) | 3.375% | 3.375% | 3.375% | 1.50% | 1.50% | 1.50% | |||
| Proceeds from notes | 492 | 323 | |||||||
| Redemption option, price as a percentage of principal | 100.00% | 101.00% | |||||||
| Debt conversion, amount of original debt | $ 0.9 | $ 0.1 | |||||||
| Debt conversions (in shares) | 1,562 | 17,352 | |||||||