Segment information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Revenue and Operating Profit [Line Items]
Revenues	$ 1,039.4	$ 982.4	$ 969.9	$ 950.5	$ 977.1	$ 926.2	$ 914.6	$ 917.1	$ 3,942.2	$ 3,735.0	$ 3,662.9
Operating profit	62.4	59.2	32.8	17.3	50.4	45.0	30.8	48.8	171.7	175.0	202.5
Capital expenditures	55.5	44.0	44.8	33.4	65.9	44.1	35.9	32.0	177.7	177.9	183.7
Depreciation									167.1	148.5	139.4
Amortization									(7.8)	(9.1)
Depreciation and amortization	47.0	42.3	42.2	42.1	40.4	38.4	38.2	38.7	173.6	155.7	148.1
Total assets	2,498.0				2,553.9				2,498.0	2,553.9	2,406.2
Long-Lived Assets	1,045.2				1,093.7				1,045.2	1,093.7	1,044.4
Revenues									3,942.2	3,735.0	3,662.9
Assets Net	912.8				842.6				912.8	842.6	802.9
Unconsolidated Equity Affiliates held by International Segment [Abstract]
Carrying value of investments at year end	15.8				15.6				15.8	15.6	12.8
Share of earnings of unconsolidated equity affiliates									6.7	6.0	4.8
Undistributed earnings of equity affiliates included in consolidated retained earrings [Abstract]
Undistributed earnings	4.3				8.8				4.3	8.8	7.1
France [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	161.8				163.5				161.8	163.5	149.9
Revenues									542.5	535.5	545.2
Mexico [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	148.1				145.3				148.1	145.3	123.9
Revenues									450.4	424.0	415.2
Brazil [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	107.9				95.6				107.9	95.6	100.9
Revenues									392.0	388.3	386.8
Canada [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	50.7				90.8				50.7	90.8	87.3
Revenues									190.9	186.6	189.9
Venezuela [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	47.7				46.7				47.7	46.7	43.5
Revenues									447.1	342.6	269.2
All Other Segments [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	335.0				348.8				335.0	348.8	338.1
Revenues									1,211.8	1,151.3	1,123.1
Non Us [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	851.2				890.7				851.2	890.7	843.6
Revenues									3,234.7	3,028.3	2,929.4
United States [Member]
Segment Revenue and Operating Profit [Line Items]
Long-Lived Assets	194.0				203.0				194.0	203.0	200.8
Revenues									707.5	706.7	733.5
Latin America [Member]
Segment Revenue and Operating Profit [Line Items]
Revenues									1,720.7	1,579.4	1,460.7
Operating profit									149.9	135.1	143.5
Capital expenditures									88.7	83.8	85.0
Depreciation									57.1	47.5	41.4
Amortization									3.7	3.2	3.9
Total assets	1,044.0				880.9				1,044.0	880.9	761.0
Assets Net	479.4				438.2				479.4	438.2	376.9
Unconsolidated Equity Affiliates held by International Segment [Abstract]
Carrying value of investments at year end	13.5				13.8				13.5	13.8	11.2
Share of earnings of unconsolidated equity affiliates									6.0	5.8	4.7
Undistributed earnings of equity affiliates included in consolidated retained earrings [Abstract]
Undistributed earnings	3.5				8.4				3.5	8.4	6.6
Europe, Middle East and Africa [Member]
Segment Revenue and Operating Profit [Line Items]
Revenues									1,178.3	1,125.9	1,143.0
Operating profit									81.5	88.1	73.4
Capital expenditures									33.9	40.1	47.3
Depreciation									47.2	41.1	44.1
Amortization									1.6	2.6	2.9
Total assets	672.6				681.3				672.6	681.3	669.4
Assets Net	291.4				272.1				291.4	272.1	283.4
Unconsolidated Equity Affiliates held by International Segment [Abstract]
Share of earnings of unconsolidated equity affiliates									0	0	(0.1)
Undistributed earnings of equity affiliates included in consolidated retained earrings [Abstract]
Undistributed earnings	0				0				0	0	0
North America [Member]
Segment Revenue and Operating Profit [Line Items]
Revenues									898.4	893.3	923.4
Operating profit									4.7	31.9	30.3
Capital expenditures									52.1	48.2	44.2
Depreciation									58.0	55.1	50.1
Amortization									0.2	0.3	0.7
Total assets	426.6				480.5				426.6	480.5	468.6
Unconsolidated Equity Affiliates held by International Segment [Abstract]
Carrying value of investments at year end	0				0				0	0	0
Share of earnings of unconsolidated equity affiliates									0	0	0
Undistributed earnings of equity affiliates included in consolidated retained earrings [Abstract]
Undistributed earnings	0				0				0	0	0
Asia Pacific [Member]
Segment Revenue and Operating Profit [Line Items]
Revenues									144.8	136.4	135.8
Operating profit									16.7	8.8	15.1
Capital expenditures									3.0	5.8	7.2
Depreciation									4.8	4.8	3.8
Amortization									1.0	1.1	1.2
Total assets	108.1				146.3				108.1	146.3	135.5
Assets Net	72.7				89.1				72.7	89.1	85.8
Unconsolidated Equity Affiliates held by International Segment [Abstract]
Carrying value of investments at year end	2.3				1.8				2.3	1.8	1.6
Share of earnings of unconsolidated equity affiliates									0.7	0.2	0.2
Undistributed earnings of equity affiliates included in consolidated retained earrings [Abstract]
Undistributed earnings	0.8				0.4				0.8	0.4	0.5
Canada [Member]
Segment Revenue and Operating Profit [Line Items]
Assets Net	69.3				43.2				69.3	43.2	56.8
Segment operating profit [Member]
Segment Revenue and Operating Profit [Line Items]
Operating profit									252.8	263.9	262.3
Total assets	2,251.3				2,189.0				2,251.3	2,189.0	2,034.5
Non Segment [Member]
Segment Revenue and Operating Profit [Line Items]
Operating profit									(81.1)	(88.9)	(59.8)
Total assets	$ 246.7				$ 364.9				$ 246.7	$ 364.9	$ 371.7