Stock-Based Compensation (Summary Of Performance Share Unit Activity) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares, Issued		172,231
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 5.9
Performance Share Units Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 19.5	$ 19.5
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition		1 year 6 months
Outstanding at January 1, 2014 (non-vested)		983,610
Granted		26,493
Vesting and transfer of ownership to recipients		(181,290)
Forfeited		(108,182)
Outstanding at June 30, 2014 (non-vested)	720,631	720,631
Percentage Of Share Units Awarded Ultimately Issued	95.00%
Current Estimated Percentage Of Share Units Awarded Ultimately Issued		100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		$ 40.55
Performance Share Units Member | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense		3 years
Percentage Of Share Units Awarded Ultimately Issued		200.00%
Performance Share Units Member | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Share Units Awarded Ultimately Issued		0.00%