Stock-Based Compensation Outstanding Options and SSARs (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 years		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Beginning balance	8,315,000		7,580,000	6,611,000
Options / SSARs granted	971,000		834,000	1,160,000
Options / SSARs exercised	(751,000)		(18,000)	(83,000)
Options / SSARs cancelled	(60,000)		(81,000)	(108,000)
Ending balance	8,475,000		8,315,000	7,580,000
Options / SSARs outstanding Weighted Average Exercise Price	$ 12.88		$ 12.78	$ 13.10	$ 13.99
SSARs granted Weighted Average Exercise Price	$ 8.85		$ 10.06	$ 7.05
Options / SSARs exercised Weighted Average Exercise Price	$ 6.24		$ 4.93	$ 2.17
Options / SSARs cancelled Weighted Average Exercise Price	$ 16.69		$ 15.88	$ 11.36
Options / SSARs outstanding Weighted Average Contractual Term (in years)	5.8
Options / SSARs outstanding Aggregate Intrinsic Value (in millions)	$ 64.7
Vested and expected to vest	8,051,000	[1]
Vested and expected to vest Aggregate Intrinsic Value (in millions)	61.4	[1]
Options / SSARs exercisable	6,622,000
Options / SSARs exercisable Weighted Average Exercise Price	$ 14.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5.0
Options / SSARs exercisable Aggregate Intrinsic Value (in millions)	45.3
Options and SSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Weighted-average period of years costs are expected to be recognied over	1.4
Compensation expense related to award	3.7		3.9	4.9
Unrecognized compensation costs	3.8
Shares available under stock award plans	3,411,023
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Weighted-average period of years costs are expected to be recognied over	1.1
Compensation expense related to award	2.3		2.3	1.9
Unrecognized compensation costs	$ 2.7

[1] Options or SSARS expected to vest based upon historical forfeiture rate