v3.3.1.900
Defined Benefit Plans (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2014
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Estimated future subsidiaries contributions in next fiscal year $ 58.5
Equity securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 27.00%
Debt securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 26.00%
Insurance contract [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 20.00%
Hedge funds [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 11.00%
Guarantee investment contracts [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 8.00%
Real estate [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 5.00%
Other [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset mix 3.00%