| **Commitments and Contingencies (Details) (February 9, 2015 Through June 28, 2015 [Member], USD $)Share data in Millions, unless otherwise specified** | 0 Months Ended                                                                                                                                                      |                                                                                                                                                                     |                                                                                                                                                       |
|--------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| February 9, 2015 Through June 28, 2015 [Member]                                                                                                        |                                                                                                                                                                |                                                                                                                                                                |                                                                                                                                                  |
| **Equity, Class of Treasury Stock [Line Items]**                                                                                                       |                                                                                                                                                                |                                                                                                                                                                |                                                                                                                                                  |
| Accelerated share repurchases, authorized amount                                                                                                       |                                                                                                                                                                |                                                                                                                                                                | $ 5,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1/ us-gaap_AcceleratedShareRepurchasesDateAxis= pfe_February92015ThroughJune282015Member |
| Shares repurchased                                                                                                                                     | 150us-gaap_TreasuryStockSharesAcquired/ us-gaap_AcceleratedShareRepurchasesDateAxis= pfe_February92015ThroughJune282015Member                                       |                                                                                                                                                                |                                                                                                                                                  |
| Accelerated share repurchases, cash paid                                                                                                               | $ 5,000,000,000us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt/ us-gaap_AcceleratedShareRepurchasesDateAxis= pfe_February92015ThroughJune282015Member | $ 5,000,000,000us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt/ us-gaap_AcceleratedShareRepurchasesDateAxis= pfe_February92015ThroughJune282015Member |                                                                                                                                                  |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653
+ Details**Name:**us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_EquityClassOfTreasuryStockLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of stock repurchase plan authorized.
+ References
No definition available.
+ Details**Name:**us-gaap_StockRepurchaseProgramAuthorizedAmount1**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares that have been repurchased during the period and are being held in treasury.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5
+ Details**Name:**us-gaap_TreasuryStockSharesAcquired**Namespace Prefix:**us-gaap_**Data Type:**xbrli:sharesItemType**Balance Type:**na**Period Type:**duration |