Changes in Accumulated Other Comprehensive Income (Loss) (Changes by Component)(Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated comprehensive loss at beginning of period	$ (896,994)	$ 5,671	$ (134,516)
Other comprehensive loss before reclassifications	(720,570)	(956,130)	197,842
Amounts reclassified from accumulated other comprehensive income (loss)	289,131	53,465	(57,655)
Total other comprehensive (loss) income	(431,439)	(902,665)	140,187
Accumulated comprehensive loss at end of period	(1,328,433)	(896,994)	5,671
Changes related to cash flow derivative hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated comprehensive loss at beginning of period	(826,026)	43,324	(84,505)
Other comprehensive loss before reclassifications	(697,671)	(919,094)	188,073
Amounts reclassified from accumulated other comprehensive income (loss)	291,624	49,744	(60,244)
Total other comprehensive (loss) income	(406,047)	(869,350)	127,829
Accumulated comprehensive loss at end of period	(1,232,073)	(826,026)	43,324
Changes in defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated comprehensive loss at beginning of period	(31,207)	(23,994)	(34,823)
Other comprehensive loss before reclassifications	3,053	(8,937)	8,240
Amounts reclassified from accumulated other comprehensive income (loss)	1,707	1,724	2,589
Total other comprehensive (loss) income	4,760	(7,213)	10,829
Accumulated comprehensive loss at end of period	(26,447)	(31,207)	(23,994)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated comprehensive loss at beginning of period	(39,761)	(13,659)	(15,188)
Other comprehensive loss before reclassifications	(25,952)	(28,099)	1,529
Amounts reclassified from accumulated other comprehensive income (loss)	(4,200)	1,997	0
Total other comprehensive (loss) income	(30,152)	(26,102)	1,529
Accumulated comprehensive loss at end of period	$ (69,913)	$ (39,761)	$ (13,659)

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580

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-Publisher SEC
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-Number 210
-Section 02
-Paragraph 31
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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