Pension And Postretirement Benefits (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Qualifying employees receive additional contribution, percentage	2.00%
Transferred from Level 3 to Level 2		$ 16,000,000
Percentage of annual contribution to each eligible participant's gross compensation	5.00%
Percentage of non-matching contribution to participants	2.00%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net gain/loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost	12,700,000
Estimated net gain/loss that will be amortized from accumulated other compreshensive income into net peridoic benefit cost, prior service cost	0
Expected cash contribution based on current actuarial calculations in 2012	15,000,000
Defined benefit plans contribution by the company	4,278,000	47,495,000
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net gain/loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost	0
Estimated net gain/loss that will be amortized from accumulated other compreshensive income into net peridoic benefit cost, prior service cost	200,000
Expected cash contribution based on current actuarial calculations in 2012	1,000,000
Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	49.00%	48.00%
Target plan asset allocation range minimum	35.00%
Target plan asset allocation range maximum	75.00%
Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	37.00%	35.00%
Target plan asset allocation range minimum	20.00%
Target plan asset allocation range maximum	50.00%
Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	13.00%	12.00%
Target plan asset allocation range minimum	0.00%
Target plan asset allocation range maximum	20.00%
Money market [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		1.00%	5.00%
Target plan asset allocation range minimum	0.00%
Target plan asset allocation range maximum	10.00%
Common Stock [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	4.00%	5.00%
Money Purchase Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	2,200,000	2,300,000	2,200,000
Savings And Investment Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	6,400,000	6,600,000	3,200,000
2% Non-Matching Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	$ 3,300,000	$ 2,400,000	$ 2,200,000
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	28.00%
Expected rate of return on assets assumption reflected as a long-term asset allocation	8.25%
Expected return on assets for next fiscal year	7.75%
U.S. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	8.25%	8.25%	8.25%
U.S. [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	54.00%
U.S. [Member] | Equity securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	25.00%
U.S. [Member] | Equity securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	75.00%
U.S. [Member] | Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	25.00%
U.S. [Member] | Fixed income securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	15.00%
U.S. [Member] | Fixed income securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
U.S. [Member] | Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	21.00%
U.S. [Member] | Alternative assets/Other [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	10.00%
U.S. [Member] | Alternative assets/Other [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
U.S. [Member] | Cash [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	0.00%
U.S. [Member] | Cash [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	10.00%
U.S. [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	0.00%
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	14.00%
Non-U.S. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	7.00%	7.01%	7.13%
Non-U.S. [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	45.00%
Non-U.S. [Member] | Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		48.00%
Non-U.S. [Member] | Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		5.00%
Non-U.S. [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		2.00%