Financial Instruments - Foreign currency derivatives (Details) In Millions, unless otherwise specified	Dec. 31, 2013 Net investment hedge contracts [Member] Apr - 16 USD ($)	Dec. 31, 2013 Net investment hedge contracts [Member] Apr - 16 EUR (€)	Dec. 31, 2014 Foreign currency contracts [Member] Apr - 16 Euro USD ($)	Dec. 31, 2013 Foreign currency contracts [Member] Apr - 16 Euro USD ($)	Dec. 31, 2013 Foreign currency contracts [Member] Dec - 14 Euro HUF	Dec. 31, 2013 Foreign currency contracts [Member] Dec - 14 Euro PLN	Dec. 31, 2013 Foreign currency contracts [Member] Dec - 14 US dollar JPY (¥)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Euro GBP (£)	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Euro GBP (£)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Japanese yen USD ($)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Japanese yen CNY	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Japanese yen KRW	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Japanese yen USD ($)	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Japanese yen CNY	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Japanese yen KRW	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Korean won USD ($)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Korean won EUR (€)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Korean won JPY (¥)	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Korean won EUR (€)	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Korean won JPY (¥)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Mexican peso USD ($)	Dec. 31, 2014 Foreign currency contracts [Member] Dec -15 Swedish krona EUR (€)	Dec. 31, 2013 Foreign currency contracts [Member] Dec -15 Swedish krona EUR (€)	Dec. 31, 2014 Foreign currency contracts [Member] Feb - 16 Euro JPY (¥)	Dec. 31, 2013 Foreign currency contracts [Member] Feb - 16 Euro JPY (¥)	Dec. 31, 2013 Foreign currency contracts [Member] Jul -14 Euro PLN
Derivative [Line Items]
Notional in traded currency	$ 75.0	€ 58.5	$ 23.5	$ 29.4	6,430.5	96.0	¥ 3,209.3	£ 5.7	£ 3.0	$ 3.8	88.6	6,712.5	$ 4.2	84.0	5,715.5	$ 22.7	€ 2.5	¥ 72.0	€ 23.6	¥ 380.5	$ 22.6	€ 31.4	€ 33.7	¥ 4,371.8	¥ 5,830.7	663.1