XML 66 R29.htm IDEA: XBRL DOCUMENT v2.4.0.8
Financing Arrangements Financing Arrangements (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Debt Matured March 2013 [Member]
Feb. 27, 2013
Debt Issued Due 2023 [Member]
Feb. 27, 2013
Debt Issued Due 2043
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 500 $ 250 $ 250
Debt Instrument, Interest Rate, Stated Percentage 5.50% 3.70% 5.15%
Repurchase of Notes, Purchase Price Percentage of Principle Amount   101.00% 101.00%