Borrowings and Lines of Credit (Repayments of Long-term Debt) (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2020 EUR (€)
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost	$ 703
3.125% notes due 2020
Debt Instrument [Line Items]
Repayments of Debt	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage				3.125%
Debt Instrument, Maturity Year Date	2020
Notes 3.650% Due 2023 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 410
Debt Instrument, Interest Rate, Stated Percentage				3.65%
Debt Instrument, Maturity Year Date	2023
EURIBOR plus 0.20% floating rate notes due 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 817
Debt Instrument, Interest Rate, Stated Percentage				0.20%
Debt Instrument, Face Amount | €				€ 750
Debt Instrument, Maturity Year Date	2020
Notes 4.500% Due 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,250
Debt Instrument, Interest Rate, Stated Percentage				4.50%
Debt Instrument, Maturity Year Date	2020
Notes 1.125% Due 2021 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,082
Debt Instrument, Interest Rate, Stated Percentage				1.125%
Debt Instrument, Face Amount | €				€ 950
Debt Instrument, Maturity Year Date	2021
Notes 1.250% due 2023 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 836
Debt Instrument, Interest Rate, Stated Percentage				1.25%
Debt Instrument, Face Amount | €				€ 750
Debt Instrument, Maturity Year Date	2023
Notes 1.150% Due 2024 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 841
Debt Instrument, Interest Rate, Stated Percentage				1.15%
Debt Instrument, Face Amount | €				€ 750
Debt Instrument, Maturity Year Date	2024
Notes 1.875% Due 2026 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 567
Debt Instrument, Interest Rate, Stated Percentage				1.875%
Debt Instrument, Face Amount | €				€ 500
Debt Instrument, Maturity Year Date	2026
Notes 1.900% Due 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage				1.90%
Debt Instrument, Maturity Year Date	2020
Notes 3.350% due 2021 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage				3.35%
Debt Instrument, Maturity Year Date	2021
LIBOR plus 0.650% floating rate notes due 2021 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 750
Debt Instrument, Interest Rate, Stated Percentage				0.65%
Debt Instrument, Maturity Year Date	2021
Notes 1.950% Due 2021 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 750
Debt Instrument, Interest Rate, Stated Percentage				1.95%
Debt Instrument, Maturity Year Date	2021
Notes 2.300% Due 2022 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 500
Debt Instrument, Interest Rate, Stated Percentage				2.30%
Debt Instrument, Maturity Year Date	2022
Notes 3.100% Due 2022 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 2,300
Debt Instrument, Interest Rate, Stated Percentage				3.10%
Debt Instrument, Maturity Year Date	2022
Notes 2.800% Due 2024 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 800
Debt Instrument, Interest Rate, Stated Percentage				2.80%
Debt Instrument, Maturity Year Date	2024
Notes 4.875% Due 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 171
Debt Instrument, Interest Rate, Stated Percentage				4.875%
Debt Instrument, Maturity Year Date	2020
Notes 3.650% Due 2023 Feb28
Debt Instrument [Line Items]
Repayments of Debt	$ 1,669
Debt Instrument, Interest Rate, Stated Percentage				3.65%
Debt Instrument, Maturity Year Date		2023	2023
Notes 2.650% Due 2026 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 431
Debt Instrument, Interest Rate, Stated Percentage				2.65%
Debt Instrument, Maturity Year Date	2026	2026	2026
Notes 8.875% Due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 271
Debt Instrument, Interest Rate, Stated Percentage		8.875%	8.875%
Debt Instrument, Maturity Year Date		2019	2019
EURIBOR plus 0.15% floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt | €			€ 750
Debt Instrument, Interest Rate, Stated Percentage		0.15%	0.15%
Debt Instrument, Maturity Year Date		2019	2019
LIBOR plus 0.350% floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 350
Debt Instrument, Interest Rate, Stated Percentage		0.35%	0.35%
Debt Instrument, Maturity Year Date		2019	2019
Notes 1.500% Due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 650
Debt Instrument, Interest Rate, Stated Percentage		1.50%	1.50%
Debt Instrument, Maturity Year Date		2019	2019
Notes 1.950% Due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 300
Debt Instrument, Interest Rate, Stated Percentage		1.95%	1.95%
Debt Instrument, Maturity Year Date		2019	2019
Notes 5.250% Due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 300
Debt Instrument, Interest Rate, Stated Percentage		5.25%	5.25%
Debt Instrument, Maturity Year Date		2019	2019