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Borrowings and Credit Arrangements (Details) € in Millions, £ in Millions |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 09, 2020 USD ($) | Dec. 05, 2019 USD ($) | Nov. 27, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 GBP (£) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Feb. 25, 2019 USD ($) | Dec. 19, 2018 USD ($) | Aug. 04, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase Obligation, Due in Next Twelve Months |  |  |  |  |  |  |  | $ 334,000,000 |  |  |  |
Recorded Unconditional Purchase Obligation Due in Next Twelve Months |  |  |  |  |  |  |  | 1,000,000 |  |  |  |
Recorded Unconditional Purchase Obligation Due in Second Year |  |  |  |  |  |  |  | 20,000,000 |  |  |  |
Purchase Obligation, Due in Third Year |  |  |  |  |  |  |  | 7,000,000 |  |  |  |
Purchase Obligation, Due in Fourth Year |  |  |  |  |  |  |  | 3,000,000 |  |  |  |
Purchase Obligation, Due in Fifth Year |  |  |  |  |  |  |  | 1,000,000 |  |  |  |
Repurchase Agreement Counterparty, Amount at Risk |  |  |  |  |  |  |  | 1.01 |  |  |  |
Senior notes issued |  |  |  |  |  |  |  | 7,311,000,000 |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  | $ 4,803,000,000 |  |  | 8,592,000,000 |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  | 7,056,000,000.000 |  |  | 10,008,000,000.000 |  |  |  |
Debt, Current |  |  |  |  | 2,253,000,000 |  |  | 1,416,000,000 |  |  |  |
Amount of exclusions from EBITDA related to existing restructuring plans |  |  |  |  |  |  |  | 500,000,000 |  |  |  |
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA |  |  |  |  |  |  |  | 270,000,000 |  |  |  |
Amount of exclusions from EBITDA related to future litigation charges and payments |  |  |  |  |  |  |  | 2,624,000,000 |  |  |  |
Legal payments remaining to be excluded from calculation of consolidated EBITDA |  |  |  |  |  |  |  | 1,199,000,000 |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  | $ 86,000,000 |  |  |  |  |  |  |  |
Repayments of Debt |  | $ 800,000,000 | $ 200,000,000 |  |  |  |  |  |  |  |  |
Interest Expense |  |  |  | $ 473,000,000 | 241,000,000 | $ 229,000,000 |  |  |  |  |  |
Purchase Obligation |  |  |  |  |  |  |  | 366,000,000 |  |  |  |
Letters of Credit Outstanding, Amount |  |  |  |  | 111,000,000 |  |  | 105,000,000 |  |  |  |
Borrowings [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  |  | $ 1,248,000,000 |  |  | $ 711,000,000 |  |  |  |
Commercial Paper [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Maturity, Days |  |  |  | 55 days | 27 days |  |  |  |  |  |  |
Maximum Commercial Paper Outstanding with 2018 Facility |  |  |  |  | $ 2,750,000,000 |  |  |  |  |  | $ 2,750,000,000 |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |  |  |  |  | 3.04% |  | 2.21% | 2.21% | 2.21% |  |  |
August 2019 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt |  |  |  |  |  |  |  | $ 1,000,000,000.000 |  |  |  |
Covenant Requirement [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 3.75 | 3.75 | 3.75 |  |  |
Covenant Requirement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 4.75 | 4.75 | 4.75 |  |  |
Actual, Covenant [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 3.83 | 3.83 | 3.83 |  |  |
Requirement, first two quarters following qualified acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 4.75 | 4.75 | 4.75 |  |  |
Requirement, third quarter following qualified acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 4.50 | 4.50 | 4.50 |  |  |
Requirement, fourth quarter following qualified acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 4.25 | 4.25 | 4.25 |  |  |
Requirement, fifth quarter following qualified acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 4.00 | 4.00 | 4.00 |  |  |
Requirement, sixth quarter and thereafter following qualified acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of compliance with debt covenants |  |  |  |  |  |  |  |  |  |  |  |
Maximum Leverage Ratio |  |  |  |  |  |  | 3.75 | 3.75 | 3.75 |  |  |
Commercial Paper [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  | $ 1,502,000,000 |  |  | $ 2,039,000,000 |  |  |  |
the 2017 Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | $ 2,250,000,000
the 2018 facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Current interest rate on revolving credit facility |  |  |  | 1.02% |  |  |  |  |  |  |  |
Line of Credit Facility, Description |  |  |  | 0.40% |  |  |  |  |  |  |  |
Commitment fee percentage |  |  |  | 0.11% |  |  |  |  |  |  |  |
Tender Offer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  |  |  |  | (1,000,000,000.000) | € (900) |  |  |
February2019AggregateOffering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  |  |  |  |  |  | $ (4,300,000,000) |  |
March 2039 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | $ 0 |  |  | $ (750,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (4.55%) | (4.55%) | (4.55%) |  |  |
October 2018 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | (2.65%) |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  | $ 600,000,000 |  |  |  |  |  |  |
January 2020 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (850,000,000) |  |  | $ 0 |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (6.00%) | (6.00%) | (6.00%) |  |  |
Repayments of Debt |  |  |  | $ 850,000,000 |  |  |  |  |  |  |  |
May 2020 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (600,000,000) |  |  | $ 0 |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (2.85%) | (2.85%) | (2.85%) |  |  |
Repayments of Debt |  |  |  | 600,000,000 |  |  |  |  |  |  |  |
August 2019 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  | 1,000,000,000.000 |  |  |  |  |  |  |  |
May 2022 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (500,000,000) |  |  | $ (500,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (3.375%) | (3.375%) | (3.375%) |  |  |
August 2022 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | 0 |  |  | $ (1,000,000,000) |  |  |  |
October 2023 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (450,000,000) |  |  | $ (244,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (4.125%) | (4.125%) | (4.125%) |  |  |
Repayments of Debt |  |  |  | 206,000,000 |  |  |  |  |  |  |  |
March 2024 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | 0 |  |  | $ (850,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (3.45%) | (3.45%) | (3.45%) |  |  |
May 2025 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (750,000,000) |  |  | $ (523,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (3.85%) | (3.85%) | (3.85%) |  |  |
Repayments of Debt |  |  |  | 227,000,000 |  |  |  |  |  |  |  |
March 2026 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | 0 |  |  | $ (850,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (3.75%) | (3.75%) | (3.75%) |  |  |
December 2027 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | 0 |  |  | $ (1,011,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (0.625%) | (0.625%) | (0.625%) |  |  |
March 2028 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | $ (1,000,000,000) |  |  | $ (434,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | (4.00%) |  | (4.00%) | (4.00%) | (4.00%) |  |  |
Repayments of Debt |  |  |  | $ 566,000,000 |  |  |  |  |  |  |  |
March 2029 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | $ 0 |  |  | $ (850,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (4.00%) | (4.00%) | (4.00%) |  |  |
November 2035 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (350,000,000) |  |  | $ (350,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (7.00%) | (7.00%) | (7.00%) |  |  |
January 2040 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (300,000,000) |  |  | $ (300,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (7.375%) | (7.375%) | (7.375%) |  |  |
March 2049 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | 0 |  |  | $ (1,000,000,000.000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (4.70%) | (4.70%) | (4.70%) |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (26,000,000) |  |  | $ (7,000,000) |  |  |  |
Capital Lease Obligations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (6,000,000) |  |  | (6,000,000) |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  | (4,800,000,000) |  |  | (7,661,000,000) |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  |  |  |  | (29,000,000) |  |  | (83,000,000) |  |  |  |
2020 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt |  | $ 700,000,000 |  |  |  |  |  | $ 700,000,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | (0.65%) | (0.65%) | (0.65%) |  |  |
2020 Term Loan [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt | $ 300,000,000 |  |  |  |  |  |  |  |  |  |  |
Two-Year Delayed Draw Term Loan [Member] | Aggregate Senior Unsecured Delayed Draw Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  |  |  |  |  |  |  | (2,000,000,000.000) |
Two-Year Delayed Draw Term Loan [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  |  |  |  |  |  |  | (1,000,000,000.000) |
Euro Denominated Factoring Arrangements [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
De-recognized receivables |  |  |  |  | $ 165,000,000 |  |  | $ 171,000,000 |  |  |  |
Average interest rate of de-recognized receivables |  |  |  | 1.40% | 2.70% |  |  |  |  |  |  |
Yen Denominated Factoring Arrangements [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
De-recognized receivables |  |  |  |  | $ 195,000,000 |  |  | $ 226,000,000 |  |  |  |
Average discounted rates of notes receivables |  |  |  |  | 0.90% |  | 0.60% | 0.60% | 0.60% |  |  |
Three-Year Delayed Draw Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  | 1.13% |  |  |  |  |  |  |  |
Three-Year Delayed Draw Term Loan [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of debt maturities |  |  |  |  |  |  |  |  |  |  |  |
Payments due, Total |  |  |  |  |  |  |  |  |  |  | $ (1,000,000,000.000) |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  | $ 1,000,000,000.000 |  |  |  |
BTG Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Termination Loans |  |  |  |  |  |  | £ 150 | 184,000,000 |  |  |  |
Borrowings and Credit Arrangements (Textuals) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 150,000,000 |  |  |  |

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