Restructuring Charges (Narrative) (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		$ 202	$ 168
Asset impairment costs
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		0	0
Other exit costs
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		21	$ 14
Italy
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost \| €	€ 241
Payments for restructuring	209	$ 227
Italy \| Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	179			$ 194
Italy \| Asset impairment costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	25			27
Italy \| Other exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	€ 37			$ 40