Pensions and Postretirement Benefits Other Than Pensions (Schedule of Fair Values of Company's Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Defined benefit plan, fair value of pension plan assets	$ 3,109.7		$ 3,266.4
Receivables and payables, net	(9.3)		(17.8)
Net assets available for benefits	3,100.4		3,248.6
Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	26.7		66.0
Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	2,985.8		3,104.3
Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	97.2		96.1
Derivative [Member]
Defined benefit plan, fair value of pension plan assets	0.1		(0.4)
Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	0.1		(0.4)
Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Real Estate Funds [Member]
Defined benefit plan, fair value of pension plan assets	33.6	[1]	28.5	[1]
Real Estate Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0	[1]	0	[1]
Real Estate Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	0	[1]	0	[1]
Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	33.6	[1]	28.5	[1]
Other Defined Benefit [Member]
Defined benefit plan, fair value of pension plan assets	42.6	[2]	45.4	[2]
Other Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0	[2]	0	[2]
Other Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	0	[2]	0	[2]
Other Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	42.6	[2]	45.4	[2]
Cash and Cash Equivalents [Member]
Defined benefit plan, fair value of pension plan assets	30.5		210.2
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	1.5		40.6
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	29.0		169.6
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Equity Securities [Member]
Defined benefit plan, fair value of pension plan assets	863.8	[3]	1,381.4	[3]
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0	[3]	0	[3]
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	863.8	[3]	1,381.4	[3]
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0	[3]	0	[3]
Fixed Income Investments [Member]
Defined benefit plan, fair value of pension plan assets	2,139.1		1,601.3
Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	25.2		25.4
Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	2,092.9		1,553.7
Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	21.0		22.2
Fixed Income Investments [Member] | U.S. Government and Agency Obligations [Member]
Defined benefit plan, fair value of pension plan assets	866.6	[4]	449.0	[4]
Fixed Income Investments [Member] | U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0	[4]	0	[4]
Fixed Income Investments [Member] | U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	866.6	[4]	449.0	[4]
Fixed Income Investments [Member] | U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0	[4]	0	[4]
Fixed Income Investments [Member] | Corporate and Non-U.S. Bonds [Member]
Defined benefit plan, fair value of pension plan assets	781.9		532.3
Fixed Income Investments [Member] | Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Fixed Income Investments [Member] | Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	781.9		532.3
Fixed Income Investments [Member] | Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Fixed Income Investments [Member] | Asset-Backed And Mortgage-Backed Securities [Member]
Defined benefit plan, fair value of pension plan assets	33.6		202.6
Fixed Income Investments [Member] | Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Fixed Income Investments [Member] | Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	33.6		202.6
Fixed Income Investments [Member] | Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0		0
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member]
Defined benefit plan, fair value of pension plan assets	436.0	[5]	395.2	[5]
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	25.2	[5]	25.4	[5]
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	410.8	[5]	369.8	[5]
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	0	[5]	0	[5]
Fixed Income Investments [Member] | Other Fixed Income [Member]
Defined benefit plan, fair value of pension plan assets	21.0	[6]	22.2	[6]
Fixed Income Investments [Member] | Other Fixed Income [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	0	[6]	0	[6]
Fixed Income Investments [Member] | Other Fixed Income [Member] | Fair Value, Inputs, Level 2 [Member]
Defined benefit plan, fair value of pension plan assets	0	[6]	0	[6]
Fixed Income Investments [Member] | Other Fixed Income [Member] | Fair Value, Inputs, Level 3 [Member]
Defined benefit plan, fair value of pension plan assets	$ 21.0	[6]	$ 22.2	[6]

[1] (e)This class includes several private equity funds that invest in real estate. It includes both direct investment funds and funds-of-funds.

[2] (f)This investment comprises the Company’s non-significant, non-U.S. pension plan assets. It mostly includes insurance contracts.

[3] (a)This class includes commingled funds that focus on equity investments. It includes both indexed and actively managed funds

[4] (b)This class represents U.S. treasuries and state and municipal bonds.

[5] (c)This class comprises commingled funds that focus on fixed income securities.

[6] (d)This class includes group annuity and guaranteed interest contracts as well as other miscellaneous fixed income securities.