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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accumulated other comprehensive loss $ 1,293us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 805us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax