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Associated companies (Details 6) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of associates [line items] |  |  |
Net income statement effect | $ 673 | $ 659 | $ 6,438
Roche Holding AG, Switzerland |  |  |
Disclosure of associates [line items] |  |  |
Novartis share of current year consolidated net income | 913 | 910 | 799
Prior year adjustment | (64) | (129) | (125)
Amortization of fair value adjustments relating to intangible assets | (172) | (162) | (148)
Partial release of deferred tax liability recognized |  | 43 |
Net income statement effect | 677 | 662 | 526
Amortization of fair value adjustments relating to intangible assets tax | $ 26 | $ 24 | 40
GlaxoSmithKline Consumer Healthcare Holdings Ltd., UK |  |  |
Disclosure of associates [line items] |  |  |
Novartis share of current year consolidated net income |  |  | 119
Prior year adjustment |  |  | 4
Amortization of fair value adjustments relating to intangible assets |  |  | (3)
Gain on divestment |  |  | 5,790
Net income statement effect |  |  | 5,910
Amortization of fair value adjustments relating to intangible assets tax |  |  | $ 1

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