Fair Value Measurements - Defined Benefit Plan Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. Plans:
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 282.7	$ 290.4	$ 287.2
Non-U.S. Plans:
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	177.9	154.9	154.6
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	282.7	290.4
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	48.9	49.6
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	233.8	240.8
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	177.9	154.9
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	177.9	154.9
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	157.4	158.2
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	157.4	158.2
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	67.3	63.5
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	67.3	63.5
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	100.0	101.5
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	48.9	49.6
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	51.1	51.9
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	99.0	78.3
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	99.0	78.3
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	25.3	30.7
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	25.3	30.7
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	11.6	13.1
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	11.6	13.1
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0	$ 0