Retirement Benefit Plans (Details 12) (Foreign-based defined benefit plans [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	$ 205.1	$ 206.0	$ 179.0
Cash and Cash Equivalents [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	10.8	14.3
Energy [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.9	2.0
Materials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.0	1.6
Industrials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	3.7	3.4
Consumer discretionary [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.1	2.5
Consumer staples [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	4.0	3.7
Healthcare [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	6.0	6.7
Financials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.8	7.0
Information Technology [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.3	2.8
Telecommunication services [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.0	1.0
Utilities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.6	2.2
Other [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	28.9	27.1
Government bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	42.5	33.0
Corporate bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	35.5	41.0
Asset-backed Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	8.4	7.4
Other Debt Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.1	1.1
Mortgage Loans [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.2	5.6
Insurance contracts [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.5	5.0
Other Investments [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.0	7.1
Real Estate [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	31.8	31.5
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	67.8	71.4
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and Cash Equivalents [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	10.8	14.3
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Energy [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.9	2.0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Materials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.0	1.6
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Industrials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	3.7	3.4
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Consumer discretionary [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.1	2.5
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Consumer staples [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	4.0	3.7
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Healthcare [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	6.0	6.7
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Financials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.8	7.0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Information Technology [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.3	2.8
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Telecommunication services [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.0	1.0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Utilities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.6	2.2
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	26.6	24.2
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Government bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Asset-backed Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Debt Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage Loans [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Insurance contracts [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Investments [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	105.5	103.1
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Cash and Cash Equivalents [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Energy [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Materials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Industrials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Consumer discretionary [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Consumer staples [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Healthcare [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Financials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Information Technology [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Telecommunication services [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Utilities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Other [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	2.3	2.9
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Government bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	42.5	33.0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Corporate bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	35.5	41.0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Asset-backed Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	8.4	7.4
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Other Debt Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	1.1	1.1
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Mortgage Loans [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.2	5.6
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Insurance contracts [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.5	5.0
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Other Investments [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	5.0	7.1
Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Real Estate [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	31.8	31.5
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Cash and Cash Equivalents [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Energy [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Materials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Industrials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Consumer discretionary [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Consumer staples [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Healthcare [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Financials [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Information Technology [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Telecommunication services [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Utilities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Other [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Government bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Corporate bonds [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Asset-backed Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Other Debt Securities [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Mortgage Loans [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Insurance contracts [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Other Investments [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	0	0
Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] | Real Estate [Member]
Fair value of non-U.S. pension plan assets
Plan assets at fair market value	$ 31.8	$ 31.5