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Pensions And Other Postretirement Benefits (Effect Of Fair Value Measurements Using Significant Unobservable Inputs (Level 3) On Changes In Other Benefit Plan Assets) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Hedge Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Hedge Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Private Equity Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Private Equity Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Real Estate [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Real Estate [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Other Benefits [Member]
|
Dec. 31, 2010
Other Benefits [Member]
|
Dec. 31, 2009
Other Benefits [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Other Benefits [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Hedge Funds [Member]
|
Dec. 31, 2010
Other Benefits [Member]
Hedge Funds [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Hedge Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Other Benefits [Member]
Hedge Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Private Equity Funds [Member]
|
Dec. 31, 2010
Other Benefits [Member]
Private Equity Funds [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Private Equity Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2010
Other Benefits [Member]
Private Equity Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Real Estate [Member]
|
Dec. 31, 2011
Other Benefits [Member]
Real Estate [Member]
Significant Unobservable Inputs (Level 3) [Member]
|
|
| Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||
| Beginning balance | $ 186.0 | $ 143.1 | $ 105.8 | $ 71.4 | $ 25.0 | $ 18.2 | $ 15.5 | $ 14.4 | $ 193.5 | $ 174.2 | $ 136.7 | $ 28.9 | $ 17.7 | $ 28.3 | $ 24.0 | $ 24.0 | $ 14.6 | $ 8.7 | $ 7.4 | $ 4.9 | $ 3.1 | $ 10.2 | |
| Relating to assets still held at the reporting date | 7.0 | 7.8 | (2.4) | 2.4 | 2.6 | 3.4 | 1.6 | 1.5 | 1.4 | 1.1 | (0.4) | 0.1 | 1.4 | 1.0 | 0.4 | ||||||||
| Purchases, sales and settlements | 18.0 | 15.0 | 3.3 | (0.4) | 10.1 | 9.3 | 0.8 | ||||||||||||||||
| Purchases | 40.2 | 17.0 | 35.8 | 17.0 | 4.4 | 18.4 | 7.7 | 0.9 | 9.8 | ||||||||||||||
| Sales | (45.0) | (39.0) | (4.9) | (1.1) | (3.4) | (3.0) | (0.4) | ||||||||||||||||
| Ending balance | $ 192.2 | $ 186.0 | $ 100.7 | $ 105.8 | $ 30.1 | $ 25.0 | $ 16.5 | $ 15.5 | $ 193.5 | $ 174.2 | $ 136.7 | $ 45.3 | $ 28.9 | $ 28.3 | $ 24.0 | $ 28.3 | $ 24.0 | $ 8.7 | $ 7.4 | $ 6.8 | $ 4.9 | $ 10.2 | $ 10.2 |