Quarterly report pursuant to Section 13 or 15(d)

Investments (Details)

v2.4.1.9
Investments (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Apr. 03, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale Debt Securities, Gross Unrealized Loss $ 101us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss  
Trading Securities    
Trading Securities Unrealized Holding Gains (Losses) 40ko_TradingSecuritiesUnrealizedHoldingGainsLosses 43ko_TradingSecuritiesUnrealizedHoldingGainsLosses
Marketable Securities 315ko_FairValueOfTradingSecuritiesIncludedInMarketableSecuritiesCaptionOnBalanceSheet 255ko_FairValueOfTradingSecuritiesIncludedInMarketableSecuritiesCaptionOnBalanceSheet
Other Assets 94ko_FairValueOfTradingSecuritiesIncludedInOtherAssetsCaptionOnBalanceSheet 96ko_FairValueOfTradingSecuritiesIncludedInOtherAssetsCaptionOnBalanceSheet
Equity Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Total trading securities $ 409us-gaap_TradingSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember
$ 351us-gaap_TradingSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember