| **Pension And Other Retiree Benefits**                | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
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| **Compensation and Retirement Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Pension And Other Retiree Benefits                    | Pension and Other Retiree BenefitsThe components of net periodic benefit cost for pension and post-retirement plans for the three and nine months ended September 30, 2013 and 2012 are as follows:  Three Months Ended September 30, Pension Benefits Post-retirement U.S. International    (in millions of dollars)2013 2012 2013 2012 2013 2012Service cost$0.5 $0.2 $0.4 $0.7 $— $0.1Interest cost2.0 2.4 3.7 3.7 0.2 0.2Expected return on plan assets(2.6) (2.6) (5.1) (4.2) — —Amortization of net loss (gain)2.4 1.5 0.6 0.5 (0.2) (0.1)Net periodic benefit cost$2.3 $1.5 $(0.4) $0.7 $— $0.2 Nine Months Ended September 30, Pension Benefits Post-retirement U.S. International    (in millions of dollars)2013 2012 2013 2012 2013 2012Service cost$1.5 $0.5 $1.2 $1.8 $0.2 $0.2Interest cost6.0 6.6 11.0 10.6 0.5 0.5Expected return on plan assets(8.0) (7.8) (15.2) (12.0) — —Amortization of prior service cost— — — 0.1 — —Amortization of net loss (gain)7.2 4.6 1.8 1.6 (0.6) (0.4)Settlement loss— 0.7 — — — —Net periodic benefit cost$6.7 $4.6 $(1.2) $2.1 $0.1 $0.3We expect to contribute approximately $14.9 million to our defined benefit plans in 2013. For the nine months ended September 30, 2013, we have contributed $12.9 million to those plans. |

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| - Definition
The entire disclosure for pension and other postretirement benefits.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017
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