This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

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Other (Income)/Deductions - Net - Footnotes - Investments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Jul. 02, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 10, 2017	Jun. 30, 2017
Investment Holdings [Line Items]
Gain on sale of investments			$ 80
Gain on sale of property			52
Available-for-sale securities, gross realized gains (losses), sale proceeds			5,100	$ 10,200	$ 4,300
Debt Securities [Member]
Investment Holdings [Line Items]
Available-for-sale securities, gross realized gains			451	666
Available-for-sale securities, gross realized losses			281	548	960
Equity Securities [Member]
Investment Holdings [Line Items]
Available-for-sale securities, gross realized gains			75		164
Private Equity Funds [Member]
Investment Holdings [Line Items]
Gain on sale of investments				2	3
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Debt Securities [Member]
Investment Holdings [Line Items]
Gain (loss) on derivative instruments, net, pretax			(120)	(64)	937
Distribution Rights [Member]
Investment Holdings [Line Items]
Gain on disposition of intangible assets			$ 187	$ 84	$ 90
Laboratorio Teuto Brasilero [Member]
Investment Holdings [Line Items]
Equity method investment, ownership percentage				40.00%			40.00%
Loss on disposal of equity method investment		$ 30
Hisun Pfizer Pharmaceuticals Co. Ltd [Member]
Investment Holdings [Line Items]
Equity method investment, ownership percentage				49.00%		49.00%
Loss on disposal of equity method investment	$ 81
Laboratorio Teuto Brasilero [Member] \| Laboratorio Teuto Brasilero [Member]
Investment Holdings [Line Items]
Noncontrolling interest, ownership percentage by parent							60.00%