XML 187 R130.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Pension and Postretirement Benefit Plans and Defined Contribution Plans - Long-term Target Asset Allocations Ranges and the Percentage of the Fair Value of Plan Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 100.00% |  |  |  |
Equity and debt securities, percentage of plan assets |  | 100.00% |  | 100.00% |  |
Plan assets | [2] | $ 469 | [1] | $ 494 | [1] | $ 458
Cash and Cash Equivalents [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 0.00% |  | 0.00% |  |
Plan assets | [1] | $ 0 |  | $ 0 |  |
Equity Securities [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 0.00% |  |  |  |
Equity and debt securities, percentage of plan assets |  | 0.00% |  | 0.00% |  |
Fixed Income Securities [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 0.00% |  |  |  |
Equity and debt securities, percentage of plan assets |  | 0.00% |  | 0.00% |  |
Plan assets | [1] | $ 0 |  | $ 0 |  |
Other Investments [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 100.00% |  | 100.00% |  |
Insurance Contracts [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Plan assets | [1] | $ 469 |  | $ 494 |  |
United States [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 100.00% |  |  |  |
Equity and debt securities, percentage of plan assets |  | 100.00% |  | 100.00% |  |
Plan assets | [3] | $ 13,051 |  | $ 14,284 |  | 12,556
United States [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 3.40% |  | 4.60% |  |
Plan assets |  | $ 443 |  | $ 655 |  |
United States [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 31.30% |  | 37.50% |  |
Plan assets |  | $ 177 |  | $ 253 |  |
United States [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 47.10% |  | 39.60% |  |
Plan assets |  | $ 96 |  | $ 94 |  |
United States [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets | [4] | 18.20% |  | 18.30% |  |
United States [Member] | Insurance Contracts [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Plan assets |  | $ 192 |  | $ 215 |  |
Foreign Plan [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 100.00% |  |  |  |
Equity and debt securities, percentage of plan assets |  | 100.00% |  | 100.00% |  |
Plan assets | [5] | $ 8,215 |  | $ 8,863 |  | $ 7,683
Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 3.00% |  | 4.30% |  |
Plan assets |  | $ 246 |  | $ 385 |  |
Foreign Plan [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 22.90% |  | 34.40% |  |
Foreign Plan [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 46.30% |  | 39.30% |  |
Plan assets |  | $ 1,770 |  | $ 2,181 |  |
Foreign Plan [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, percentage of plan assets |  | 27.90% |  | 21.90% |  |
Foreign Plan [Member] | Insurance Contracts [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Plan assets | [6] | $ 759 |  | $ 496 |  |
Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 0.00% |  |  |  |
Minimum [Member] | Other Investments [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 95.00% |  |  |  |
Minimum [Member] | United States [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 0.00% |  |  |  |
Minimum [Member] | United States [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 35.00% |  |  |  |
Minimum [Member] | United States [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 28.00% |  |  |  |
Minimum [Member] | United States [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage | [4] | 5.00% |  |  |  |
Minimum [Member] | Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 0.00% |  |  |  |
Minimum [Member] | Foreign Plan [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 20.00% |  |  |  |
Minimum [Member] | Foreign Plan [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 35.00% |  |  |  |
Minimum [Member] | Foreign Plan [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 10.00% |  |  |  |
Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 5.00% |  |  |  |
Maximum [Member] | Other Investments [Member] | Postretirement Benefits Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 100.00% |  |  |  |
Maximum [Member] | United States [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 10.00% |  |  |  |
Maximum [Member] | United States [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 55.00% |  |  |  |
Maximum [Member] | United States [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 53.00% |  |  |  |
Maximum [Member] | United States [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage | [4] | 20.00% |  |  |  |
Maximum [Member] | Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 10.00% |  |  |  |
Maximum [Member] | Foreign Plan [Member] | Equity Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 40.00% |  |  |  |
Maximum [Member] | Foreign Plan [Member] | Fixed Income Securities [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 60.00% |  |  |  |
Maximum [Member] | Foreign Plan [Member] | Other Investments [Member] | Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Equity and debt securities, target allocation percentage |  | 35.00% |  |  |  |
[1] | Reflects postretirement plan assets, which support a portion of our U.S. retiree medical plans.
[2] | The favorable change in the funded status of our postretirement plans was primarily due to an increase in the discount rate at the end of 2018, partially offset by a decrease in actual return on plan assets.
[3] | The favorable change in the funded status of our U.S. qualified plans was primarily due to an increase in the discount rate at the end of 2018, partially offset by a decrease in actual return on plan assets.
[4] | Actual percentage of plan assets in Other investments for 2018 includes $192 million, as compared to $215 million in 2017, related to a group fixed annuity insurance contract that was executed by legacy Wyeth for certain members of its defined benefit plans prior to Pfizer acquiring the company in 2009, and $177 million in 2018, as compared to $253 million in 2017, related to an investment in a partnership whose primary holdings are public equity securities.
[5] | The favorable change in the international plans’ funded status was primarily due to favorable currency movements, partially offset by a decrease in the actual return on plan assets.
[6] | See below for a tabular analysis of the changes in Level 3 investments valued using significant unobservable inputs.

X
- 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. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_OtherInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=pfe_InsuranceContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |