Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Deferred tax assets, employee benefits	$ 145,070	$ 119,434
Deferred tax assets, legal matters	31,409	30,683
Deferred tax assets, accounts receivable allowances	136,760	120,718
Deferred tax assets, inventories	21,169	31,791
Deferred tax assets, financial instruments	0	16,108
Deferred tax assets, other reserves	17,684	15,882
Deferred tax assets, tax credits	8,220	14,676
Deferred tax assets, net operating losses carryforward	303,918	293,251
Deferred tax assets, intangible assets	44,819	62,584
Deferred tax assets, capital loss carryforward	16,003	18,645
Deferred tax assets, convertible debt	51,513	40,549
Deferred tax assets, other	32,005	66,093
Total deferred tax assets, gross	808,570	830,414
Valuation allowance	(266,668)	(249,382)
Total deferred tax assets	541,902	581,032
Deferred tax liabilities:
Deferred tax liabilities, plant and equipment	126,513	103,222
Deferred tax liabilities, intangibles	442,700	371,880
Deferred tax liabilities, clean energy investments	25,939	15,754
Deferred tax liabilities, financial instruments	64,424	0
Deferred tax liabilities, other	24,953	48,715
Total deferred tax liabilities	684,529	539,571
Deferred tax assets (liabilities), net	$ (142,627)	$ 41,461