Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details 3)

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INVESTMENTS (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]      
Proceeds from Sale of Available-for-sale Securities $ 4,157us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities $ 4,212us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities $ 5,036us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Gross realized gains 38us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 12us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 41us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Gross realized losses (21)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (24)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (35)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Available-for-Sale Securities      
Schedule of Available-for-sale Securities [Line Items]      
Solvency Funds of Insurance Captive $ 836ko_SolvencyFundsOfInsuranceCaptive
/ us-gaap_GainLossOnInvestmentsByCategoryAxis
= us-gaap_AvailableforsaleSecuritiesMember
$ 667ko_SolvencyFundsOfInsuranceCaptive
/ us-gaap_GainLossOnInvestmentsByCategoryAxis
= us-gaap_AvailableforsaleSecuritiesMember