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Borrowings and Lines of Credit Borrowings and Lines of Credit (LT Debt Narrative) (Details) € in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |
Debt Percentage Bearing Variable Interest Rate | 9.00% | 9.00% | 7.00%
Gain (Loss) on Extinguishment of Debt | $ 164 |  |
Average Years of Maturity of Long Term Debt | 11 years | 11 years |
LIBOR plus 0.350% floating rate notes due 2019 |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 01, 2016 | Nov. 01, 2016 |
Proceeds from Issuance of Debt | $ 350 |  |
Debt Instrument, Maturity Year Date | 2019 | 2019 |
EURIBOR plus 0.15% floating rate notes due 2019 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 13, 2017 | Nov. 13, 2017 |
Proceeds from Issuance of Debt | € |  | € 750 |
Debt Instrument, Maturity Year Date | 2019 | 2019 |
EURIBOR plus 0.800% floating rate notes due 2018 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Feb. 22, 2016 | Feb. 22, 2016 |
Proceeds from Issuance of Debt | € |  | € 750 |
Debt Instrument, Maturity Year Date | 2018 | 2018 |
Notes 1.125% Due 2021 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Feb. 22, 2016 | Feb. 22, 2016 |
Proceeds from Issuance of Debt | € |  | € 950 |
Debt Instrument, Maturity Year Date | 2021 | 2021 |
Notes 1.875% Due 2026 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Feb. 22, 2016 | Feb. 22, 2016 |
Proceeds from Issuance of Debt | € |  | € 500 |
Debt Instrument, Maturity Year Date | 2026 | 2026 |
Notes 2.300% Due 2022 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | May 04, 2017 | May 04, 2017 |
Proceeds from Issuance of Debt | $ 500 |  |
Debt Instrument, Maturity Year Date | 2022 | 2022 |
Notes 1.900% Due 2020 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | May 04, 2017 | May 04, 2017 |
Proceeds from Issuance of Debt | $ 1,000 |  |
Debt Instrument, Maturity Year Date | 2020 | 2020 |
Notes 2.800% Due 2024 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | May 04, 2017 | May 04, 2017 |
Proceeds from Issuance of Debt | $ 800 |  |
Debt Instrument, Maturity Year Date | 2024 | 2024 |
Notes 3.125% Due 2027 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | May 04, 2017 | May 04, 2017 |
Proceeds from Issuance of Debt | $ 1,100 |  |
Debt Instrument, Maturity Year Date | 2027 | 2027 |
Notes 4.050% Due 2047 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | May 04, 2017 | May 04, 2017 |
Proceeds from Issuance of Debt | $ 600 |  |
Debt Instrument, Maturity Year Date | 2047 | 2047 |
Notes 1.500% Due 2019 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 01, 2016 | Nov. 01, 2016 |
Proceeds from Issuance of Debt | $ 650 |  |
Debt Instrument, Maturity Year Date | 2019 | 2019 |
Notes 1.950% Due 2021 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 01, 2016 | Nov. 01, 2016 |
Proceeds from Issuance of Debt | $ 750 |  |
Debt Instrument, Maturity Year Date | 2021 | 2021 |
Notes 2.650% Due 2026 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 01, 2016 | Nov. 01, 2016 |
Proceeds from Issuance of Debt | $ 1,150 |  |
Debt Instrument, Maturity Year Date | 2026 | 2026 |
Notes 3.750% Due 2046 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Issuance Date | Nov. 01, 2016 | Nov. 01, 2016 |
Proceeds from Issuance of Debt | $ 1,100 |  |
Debt Instrument, Maturity Year Date | 2046 | 2046 |
Notes 5.375% Due 2017 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Repayment of Debt, Date | Dec. 01, 2016 | Dec. 01, 2016 |
Repayments of Debt | $ 1,000 |  |
Notes 6.125% Due 2019 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Repayment of Debt, Date | Dec. 01, 2016 | Dec. 01, 2016 |
Repayments of Debt | $ 1,250 |  |

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