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Borrowings and Lines of Credit (Long-term Debt Obligations) (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 30, 2014
Debt Instrument [Line Items]
Proceeds from Notes Payable	$ 987		$ 1,240
Long-term debt	4,299		4,265
Commercial paper	0		459
Capital Lease Obligations	18		14
Long-term debt and capital lease obligations	4,317		4,280
Less payments due within one year	530		254
Long-term debt	$ 3,787		$ 4,026
Effective interest rates	8.40%		3.10%
Repayments of Debt	$ 379		$ 340	$ 1,803
Notional Amount of Nonderivative Instruments		€ 300	300
Notes 1.9 Percent Due 2016
Debt Instrument [Line Items]
Long-term debt	$ 0		250
Debt instrument, interest rate, stated percentage	1.90%
Notional Amount of Nonderivative Instruments \| €		250
3-year Variable Rate Euro Bank Loan Due 2017
Debt Instrument [Line Items]
Long-term debt	$ 526		544
Notes 6.65 Percent Due 2018
Debt Instrument [Line Items]
Long-term debt	$ 0		125
Debt instrument, interest rate, stated percentage	6.65%
Repayments of Debt	$ 133
Notes 6.875 Percent Due 2017
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	6.875%
Notes 0.00% Due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 313		0
Debt instrument, interest rate, stated percentage	0.00%
Notional Amount of Nonderivative Instruments \| €		300
Notes 2.3 Percent Due 2019
Debt Instrument [Line Items]
Long-term debt	$ 298		297
Debt instrument, interest rate, stated percentage	2.30%				2.30%
Notes 3.6 Percent Due 2020
Debt Instrument [Line Items]
Long-term debt	$ 496		496
Debt instrument, interest rate, stated percentage	3.60%
Non-callable Debentures 9 Percent Due 2021
Debt Instrument [Line Items]
Long-term debt	$ 133		133
Debt instrument, interest rate, stated percentage	9.00%
Notes 0.875 Percent Due 2022
Debt Instrument [Line Items]
Long-term debt	$ 626		647
Debt instrument, interest rate, stated percentage	0.0875%
Notes 0.875% Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 621		0
Debt instrument, interest rate, stated percentage	0.875%
Notional Amount of Nonderivative Instruments \| €		600
Notes 1.4 Percent Due 2027
Debt Instrument [Line Items]
Long-term debt	$ 620		641
Debt instrument, interest rate, stated percentage	1.40%
Notes 2.5 Percent Due 2029
Debt Instrument [Line Items]
Proceeds from Notes Payable \| €		€ 99
Long-term debt	$ 83		86
Debt instrument, interest rate, stated percentage	2.50%				2.50%
Notes 7.70 Percent Due 2038
Debt Instrument [Line Items]
Long-term debt	$ 174		174
Debt instrument, interest rate, stated percentage	7.70%
Notes 5.5 Percent Due 2040
Debt Instrument [Line Items]
Long-term debt	$ 247		246
Debt instrument, interest rate, stated percentage	5.50%
Notes 3.0 Percent Due 2044
Debt Instrument [Line Items]
Proceeds from Notes Payable	$ 142
Long-term debt	118		122
Debt instrument, interest rate, stated percentage					3.00%
Impact Of Derivatives On Debt
Debt Instrument [Line Items]
Long-term debt	3		4
Other Non US Debt
Debt Instrument [Line Items]
Long-term debt	$ 41		$ 42
Debt instrument, interest rate, stated percentage	6.10%		2.30%
Term Loan Credit Agreements 2016 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 250