Employee Benefit Plans (Activity Of Plan Assets With Fair Value Measurement Using Significant Unobservable Inputs) (Details) (USD $) In Millions, unless otherwise specified										12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Corporate Bonds, Debentures [Member]	Dec. 31, 2011 Corporate Bonds, Debentures [Member]		Dec. 31, 2012 Insurance Contracts [Member]	Dec. 31, 2011 Insurance Contracts [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Foreign Government Securities [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Foreign Government Securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Corporate Bonds, Debentures [Member]		Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Corporate Bonds, Debentures [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Insurance Contracts [Member]		Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Insurance Contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ 178.4	$ 105.5	$ 65.9	$ 4.4	$ 26.7	[1]	$ 45.4	$ 2.1	[2]	$ 5.1	$ 7.5	$ 0	$ 3.0	$ 4.1	[1]	$ 3.5		$ 1.0	[2]	$ 1.0
Transfers in and/or out of Level 3										44.4	(2.4)	0	(3.0)	0.4		0.6		44.0		0
Purchase, sales and settlements										(1.5)		0		(1.2)				(0.3)
Balance, ending	$ 178.4	$ 105.5	$ 65.9	$ 4.4	$ 26.7	[1]	$ 45.4	$ 2.1	[2]	$ 48.0	$ 5.1	$ 0	$ 0	$ 3.3	[1]	$ 4.1	[1]	$ 44.7	[2]	$ 1.0	[2]

[1] Includes investments in government bonds and corporate bonds of developed countries, emerging market government bonds, emerging market corporate bonds and convertible bonds, of which 76% of bond securities were invested in Japan as of December 31, 2012.

[2] Includes certain investments with insurance companies' General Account which guarantees a minimum rate of return on the investment.