Debt (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
5.375% Senior Notes, due 2012 [Member]
|
Nov. 15, 2012
5.375% Senior Notes, due 2012 [Member]
|
Dec. 31, 2011
5.375% Senior Notes, due 2012 [Member]
|
Dec. 31, 2012
5.9% Senior Notes, due 2017 [Member]
|
Dec. 31, 2011
5.9% Senior Notes, due 2017 [Member]
|
Dec. 31, 2012
6.55% Senior Notes, due 2037 [Member]
|
Dec. 31, 2011
6.55% Senior Notes, due 2037 [Member]
|
Dec. 31, 2012
Three Years Facility [Member]
|
Dec. 31, 2012
Commercial Paper [Member]
|
Dec. 31, 2011
Commercial Paper [Member]
|
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Debt Instrument [Line Items] | ||||||||||||||||||||
Senior Notes | $ 0 | $ 400 | $ 400 | [1] | $ 399 | [1] | $ 399 | [2] | $ 399 | [2] | ||||||||||
Short-term Debt | 457 | 0 | ||||||||||||||||||
Debt, Long-term and Short-term, Combined Amount | 1,256 | 1,198 | ||||||||||||||||||
Less: short-term debt including current maturities | 457 | 400 | ||||||||||||||||||
Long-term debt | 799 | 798 | ||||||||||||||||||
Debt (Textual) [Abstract] | ||||||||||||||||||||
Interest rate | 5.375% | 5.375% | 5.90% | 5.90% | 6.55% | 6.55% | ||||||||||||||
Unamortized debt discount on senior notes | 0.5 | 1.3 | ||||||||||||||||||
Debt Instrument, Face Amount | 400 | |||||||||||||||||||
Annual long term debt maturity year one | 0 | |||||||||||||||||||
Annual long term debt maturity year two | 0 | |||||||||||||||||||
Annual long term debt maturity year three | 0 | |||||||||||||||||||
Annual long term debt maturity year four | 0 | |||||||||||||||||||
Annual long term debt maturity year five | 400 | |||||||||||||||||||
Annual long term debt maturity after year five | $ 399 | |||||||||||||||||||
Commitment fee description | 15 to 35 basis points, depending on credit rating and currently pay a commitment fee of 20 basis points | |||||||||||||||||||
Commitment fee minimum percentage | 0.15% | |||||||||||||||||||
Commitment fee maximum percentage | 0.35% | |||||||||||||||||||
Current commitment fee | 0.20% | |||||||||||||||||||
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