Debt Debt, Textuals (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Jul. 02, 2013	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 10, 2014	May 28, 2013
Debt Instrument [Line Items]
Proceeds from Lines of Credit		$ 110,000,000
Extinguishment of Debt, Amount			167,000,000
Debt, Weighted Average Interest Rate			5.25%	6.28%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate			76.00%	87.00%
Financing Commitment							1,825,000,000
Line of Credit Facility, Maximum Borrowing Capacity			500,000,000
Consent Solitication Fee			0.25%
Notes Payable to Bank, Noncurrent			600,000,000	0			600,000,000
Proceeds from Issuance of Long-term Debt	425,000,000
Bridge Loan							725,000,000
Credit Facility, Maximum Borrowing Capacity	1,100,000,000
Pending Divestiture Proceeds	200,000,000
Leverage Ratio with payment terms	375.00%
Letters of Credit, Maximum Borrowing Capacity			175,000,000		175,000,000
Line of Credit Facility, Amount Outstanding			86,600,000
Repayments of Debt and Capital Lease Obligations			31,800,000
Letters of Credit Outstanding, Amount			32,300,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.25%
Line of credit, committed amount			18,800,000
Line of Credit Facility, Remaining Borrowing Capacity			418,900,000			308,900,000
Proceeds from Issuance of Senior Long-term Debt			200,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Principal payments on capital leases			26,280,000	25,760,000	23,030,000
Repayments of Long-term Debt			600,000	206,600,000
Gains (losses) on early extinguishment of debt, net			468,000	(22,706,000)	(3,509,000)
Write off of Deferred Debt Issuance Cost				1,300,000
Debt Instrument, Unamortized Premium				21,400,000
Capital Lease Obligations Incurred			40,100,000	78,900,000	31,300,000
Pledged Assets Separately Reported, Finance Receivables Pledged as Collateral, at Fair Value			7,600,000	1,700,000
Debt Instrument, Unamortized Discount			(42,100,000)	(4,300,000)
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position			2,100,000	3,100,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			26,400,000
Long-term Debt, Fair Value			3,277,442,000	1,991,339,000
July 2014 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			107,900,000
July 2016 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			59,100,000
October 2014 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.375%
Repayments of Long-term Debt				180,700,000
April 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.75%
April 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.75%
June 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.00%
May 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.50%
November 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			8.00%
Unsecured Debt [Member] | April 2019 [Member]
Debt Instrument [Line Items]
Senior Notes			200,000,000	0
Long-term Debt, Fair Value			10,000,000
Unsecured Debt [Member] | July 2014 [Member]
Debt Instrument [Line Items]
Convertible Debt			85,256,000	0
Long-term Debt, Fair Value			21,700,000
Unsecured Debt [Member] | July 2016 [Member]
Debt Instrument [Line Items]
Convertible Debt			46,279,000	0
Long-term Debt, Fair Value			14,200,000
Unsecured Debt [Member] | July 2018 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding			30,000,000	0		140,000,000
Unsecured Debt [Member] | February 2013 [Member]
Debt Instrument [Line Items]
Senior Notes			0	4,757,000
Unsecured Debt [Member] | April 2015 [Member]
Debt Instrument [Line Items]
Senior Notes			136,465,000	136,465,000
Unsecured Debt [Member] | April 2016 [Member]
Debt Instrument [Line Items]
Senior Notes			197,377,000	197,377,000
Unsecured Debt [Member] | June 2017 [Member]
Debt Instrument [Line Items]
Senior Notes			295,000,000	295,000,000
Unsecured Debt [Member] | October 2018 [Member]
Debt Instrument [Line Items]
Senior Notes			250,000,000	250,000,000
Unsecured Debt [Member] | May 2019 [Member]
Debt Instrument [Line Items]
Senior Notes			200,000,000	200,000,000
Unsecured Debt [Member] | November 2021 [Member]
Debt Instrument [Line Items]
Senior Notes			150,000,000	150,000,000
Unsecured Debt [Member] | April 2027 [Member]
Debt Instrument [Line Items]
Senior Notes			200,000,000	200,000,000
Discount (premium) [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			$ 35,800,000