Pension Plans and Other Employee Benefits Pension Plans Fair Value (Details) (USD $)																																																																																																																																								12 Months Ended
	Dec. 31, 2013 Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Real Estate [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Real Estate [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Hedge Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Hedge Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US Equity Securities [Member] Traded Mutual Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US Equity Securities [Member] Traded Mutual Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US Equity Securities [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US Equity Securities [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] International Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] International Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] International Equity Securities [Member] Traded Mutual Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] International Equity Securities [Member] Traded Mutual Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] International Equity Securities [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] International Equity Securities [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Commodity Contract [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Commodity Contract [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member] Traded Mutual Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member] Traded Mutual Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fixed Income Funds [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US Treasury [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US Treasury [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US corporate bonds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US corporate bonds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Corporate Bonds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Corporate Bonds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Collateralized Mortgage Obligation Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Collateralized Mortgage Obligation Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Asset-backed Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] US corporate bonds [Member] Asset-backed Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Other Plan Investments [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Total Plan Assets [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Real Estate [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Real Estate [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Hedge Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Hedge Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] International Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] International Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Commodity Contract [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Commodity Contract [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Fixed Income Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Treasury [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Treasury [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US corporate bonds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US corporate bonds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Other Plan Investments [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Real Estate [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Real Estate [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] International Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] International Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Commodity Contract [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Commodity Contract [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Treasury [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Treasury [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US corporate bonds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US corporate bonds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Other Plan Investments [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Real Estate [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Real Estate [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] International Equity Securities [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] International Equity Securities [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Commodity Contract [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Commodity Contract [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Treasury [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Treasury [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US corporate bonds [Member]		Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US corporate bonds [Member]		Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Other Plan Investments [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Equity Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Equity Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fixed Income Funds [Member] Institutional Common Collective Trust Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fixed Income Funds [Member] Mutual Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US Treasury [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US Treasury [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member]		Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Corporate Bonds [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Corporate Bonds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Collateralized Mortgage Obligation Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Collateralized Mortgage Obligation Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Asset-backed Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] US corporate bonds [Member] Asset-backed Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Mutual Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Other Plan Investments [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Total Plan Assets [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Equity Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Equity Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Treasury [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Treasury [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US corporate bonds [Member]		Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] US corporate bonds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Mutual Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 1 [Member] Other Plan Investments [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Equity Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Equity Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Treasury [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Treasury [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US corporate bonds [Member]		Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] US corporate bonds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Mutual Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 2 [Member] Other Plan Investments [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Equity Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Equity Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Treasury [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Treasury [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US Agency, State and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US corporate bonds [Member]		Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] US corporate bonds [Member]		Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Foreign corporate bonds [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Foreign corporate bonds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Mutual Funds [Member]	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member] Fair Value, Inputs, Level 3 [Member] Other Plan Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value, Plan Assets	$ 703,000,000	$ 666,400,000	$ 591,100,000	$ 49,100,000	[1]	$ 43,400,000	[1]	$ 23,100,000	[2]	$ 21,600,000	[2]	$ 193,700,000	[3]	$ 169,600,000	[3]	$ 80,500,000	$ 69,700,000	$ 113,200,000	$ 99,900,000	$ 167,100,000	[4]	$ 151,200,000	[4]	$ 39,900,000	$ 36,600,000	$ 127,200,000	$ 114,600,000	$ 34,800,000	[5]	$ 37,300,000	[5]	$ 181,300,000	[6]	$ 182,100,000	[6]	$ 27,100,000	$ 35,000,000	$ 154,200,000	$ 147,100,000	$ 2,600,000	$ 4,500,000	$ 17,100,000	$ 19,600,000	$ 25,600,000	[7]	$ 28,900,000	[7]	$ 20,100,000	$ 21,500,000	$ 3,600,000	$ 5,200,000	$ 1,900,000	$ 2,200,000	$ 2,300,000	$ 2,600,000	$ 3,000,000	$ 5,600,000	$ 3,300,000	$ 660,800,000	$ 153,100,000	$ 145,800,000	$ 0	[1]	$ 0	[1]	$ 0	[2]	$ 0	[2]	$ 80,500,000	[3]	$ 69,700,000	[3]	$ 39,900,000	[4]	$ 36,600,000	[4]	$ 0	[5]	$ 0	[5]	$ 27,100,000	[6]	$ 35,000,000	[6]	$ 2,600,000	$ 4,500,000	$ 0	$ 0	$ 0	[7]	$ 0	[7]	$ 0	$ 0	$ 3,000,000	$ 0	$ 483,100,000	$ 455,000,000	$ 5,400,000	[1]	$ 5,000,000	[1]	$ 0	[2]	$ 0	[2]	$ 113,200,000	[3]	$ 99,900,000	[3]	$ 127,200,000	[4]	$ 114,600,000	[4]	$ 34,800,000	[5]	$ 37,300,000	[5]	$ 154,200,000	[6]	$ 147,100,000	[6]	$ 0	$ 0	$ 17,100,000	$ 19,600,000	$ 25,600,000	[7]	$ 28,900,000	[7]	$ 2,300,000	$ 2,600,000	$ 0	$ 3,300,000	$ 66,800,000	$ 60,000,000	$ 43,700,000	[1]	$ 38,400,000	[1]	$ 23,100,000	[2]	$ 21,600,000	[2]	$ 0	[3]	$ 0	[3]	$ 0.0	[4]	$ 0	[4]	$ 0	[5]	$ 0	[5]	$ 0	[6]	$ 0	[6]	$ 0	$ 0	$ 0	$ 0	$ 0	[7]	$ 0	[7]	$ 0	$ 0	$ 0	$ 0	$ 101,200,000	$ 90,300,000	$ 77,400,000	$ 2,200,000	$ 1,700,000	$ 74,600,000	[8]	$ 74,400,000	$ 200,000	$ 1,500,000	$ 13,700,000	$ 4,400,000	$ 28,600,000	$ 8,600,000	[9]	$ 20,100,000	[9]	$ 7,100,000	$ 17,100,000	$ 300,000	$ 1,400,000	$ 1,200,000	$ 1,600,000	$ 1,000,000	$ 2,200,000	$ 8,600,000	$ 23,800,000	$ 200,000	$ 300,000	$ 66,500,000	$ 12,500,000	$ 15,600,000	$ 2,200,000	$ 1,700,000	$ 200,000	[8]	$ 1,500,000	$ 13,700,000	$ 0	$ 0	$ 0	[9]	$ 0	[9]	$ 0	$ 0	$ 8,600,000	$ 200,000	$ 0	$ 88,700,000	$ 50,900,000	$ 0	$ 0	$ 74,400,000	[8]	$ 0	$ 0	$ 4,400,000	$ 28,600,000	$ 8,600,000	[9]	$ 20,100,000	[9]	$ 1,000,000	$ 2,200,000	$ 0	$ 0	$ 300,000	$ 0	$ 0	$ 0	$ 0	$ 0	[8]	$ 0	$ 0	$ 0	$ 0	$ 0	[9]	$ 0	[9]	$ 0	$ 0	$ 0	$ 0	$ 0
Actual return on plan assets [Abstract]
Balance at beginning of period																																																																																																																																								60,000,000	56,400,000	38,400,000		34,700,000		21,600,000		21,700,000
Relating to assets still held																																																																																																																																								6,100,000	2,200,000	4,600,000		1,600,000		1,500,000		600,000
Relating to assets sold																																																																																																																																									900,000			1,300,000				(400,000)
Purchase, sales and settlements																																																																																																																																								700,000	500,000	700,000		800,000		0		(300,000)
Balance at end of period																																																																																																																																								$ 66,800,000	$ 60,000,000	$ 43,700,000		$ 38,400,000		$ 23,100,000		$ 21,600,000

[1] This category is comprised of institutional common/collective trust funds and a limited partnership valued at NAV on a quarterly basis.

[2] This category is comprised of closely-held limited partnerships valued at NAV on a quarterly basis.

[3] At December 31, 2013 and 2012, this category is comprised of $80.5 million and $69.7 million, respectively, of traded mutual funds valued at daily listed prices and $113.2 million and $99.9 million, respectively, of institutional common/collective trust funds valued at Net Asset Value (NAV) per share.

[4] At December 31, 2013 and 2012, this category is comprised of $39.9 million and $36.6 million, respectively, of traded mutual funds valued at daily listed prices and $127.2 million and $114.6 million, respectively, of institutional common/collective trust funds valued at daily NAV per share.

[5] This category is comprised of institutional common/collective trust funds valued at daily NAV per share.

[6] At December 31, 2013 and 2012, this category is comprised of $27.1 million and $35.0 million, respectively, of traded mutual funds valued at daily listed prices and $154.2 million and $147.1 million, respectively, of institutional common/collective trust funds valued at daily NAV per share.

[7] At December 31, 2013 and 2012, this category is comprised of $20.1 million and $21.5 million, respectively, of corporate bonds, $3.6 million and $5.2 million, respectively, of collateralized mortgage obligations and $1.9 million and $2.2 million, respectively, of other asset-backed securities.

[8] This category is comprised of $74.4 million of an institutional common/collective trust fund valued at daily NAV per share and $0.2 million of traded mutual funds valued at daily listed prices.

[9] At December 31, 2013 and 2012, this category is comprised of $7.1 million and $17.1 million, respectively, of corporate bonds, $0.3 million and $1.4 million, respectively, of collateralized mortgage obligations and $1.2 million and $1.6 million, respectively, of other asset-backed securities.