Pension and Other Post-Retirement Benefit Plans (Pension Plan Assets Measured At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Level 3
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	$ 125.6	$ 117.0	$ 95.7
U.S.
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	504.8	576.8	462.5
U.S. | Cash
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	121.2	32.4
U.S. | Large cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	54.7	169.9
U.S. | Mid cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	13.1	12.1
U.S. | Small cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	102.1	98.0
U.S. | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	83.3	142.9
U.S. | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	65.3	64.9
U.S. | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	60.3	52.1
U.S. | Emerging market bonds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	4.8	4.5
U.S. | Level 1
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	379.2	459.8
U.S. | Level 1 | Cash
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	121.2	32.4
U.S. | Level 1 | Large cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	54.7	169.9
U.S. | Level 1 | Mid cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	13.1	12.1
U.S. | Level 1 | Small cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	102.1	98.0
U.S. | Level 1 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	83.3	142.9
U.S. | Level 1 | Emerging market bonds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	4.8	4.5
U.S. | Level 3
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	125.6	117.0
U.S. | Level 3 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	65.3	64.9
U.S. | Level 3 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	60.3	52.1
International
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	386.7	400.8	327.9
International | Cash
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.3	1.1
International | Large cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	44.0	60.7
International | Mid cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.1	0.1
International | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	241.9	231.9
International | Insurance contracts
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	100.4	107.0
International | Level 1
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	286.3	293.8
International | Level 1 | Cash
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.3	1.1
International | Level 1 | Large cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	44.0	60.7
International | Level 1 | Mid cap
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.1	0.1
International | Level 1 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	241.9	231.9
International | Level 2
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	100.4	107.0
International | Level 2 | Insurance contracts
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	$ 100.4	$ 107.0