Financial Instruments, Derivatives and Fair Value Measures - Assets And Liabilities At Fair Value On A Recurring Basis (Details) - USD ($) shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended
Mar. 31, 2017	Apr. 30, 2015	Mar. 31, 2017	Dec. 31, 2016
Fair value, asset and liability measures
Fair Value - Assets	$ 241		$ 241	$ 284
Fair Value - Liabilities	$ 200		200	$ 610
Available-for-sale equity securities in an unrealized loss position
Proceeds from the sale of Mylan N.V. shares			$ 1,685
Mylan N. V. (Investee)
Available-for-sale equity securities in an unrealized loss position
Number of shares in investment sold	44,000	40,250	44,000
Proceeds from the sale of Mylan N.V. shares	$ 1,685		$ 1,700
Noncontrolling Interest, Ownership Percentage by Parent	4.80%	14.00%	4.80%	14.00%
Recurring
Fair value, asset and liability measures
Equity securities	$ 1,411		$ 1,411	$ 2,676
Interest rate swap derivative financial instruments, assets				8
Total Assets	1,652		1,652	2,960
Fair value of hedged long-term debt	5,395		5,395	5,413
Interest rate swap financial instruments, liabilities	92		92	74
Contingent consideration related to business combinations	203		203	136
Total Liabilities	5,798		5,798	5,705
Recurring \| Foreign currency forward exchange contracts
Fair value, asset and liability measures
Fair Value - Assets	241		241	276
Fair Value - Liabilities	108		108	82
Recurring \| Quoted Prices in Active Markets
Fair value, asset and liability measures
Equity securities	1,411		1,411	2,676
Total Assets	1,411		1,411	2,676
Recurring \| Significant Other Observable Inputs
Fair value, asset and liability measures
Interest rate swap derivative financial instruments, assets				8
Total Assets	241		241	284
Fair value of hedged long-term debt	5,395		5,395	5,413
Interest rate swap financial instruments, liabilities	92		92	74
Total Liabilities	5,595		5,595	5,569
Recurring \| Significant Other Observable Inputs \| Foreign currency forward exchange contracts
Fair value, asset and liability measures
Fair Value - Assets	241		241	276
Fair Value - Liabilities	108		108	82
Recurring \| Significant Unobservable Inputs
Fair value, asset and liability measures
Contingent consideration related to business combinations	203		203	136
Total Liabilities	$ 203		$ 203	$ 136

Represents number of shares in investment is sold.

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Publisher FASB
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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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- References

No definition available.

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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