Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Debt (Schedule Of Carrying And Principal Values Of Debt) (Details) - USD ($)							6 Months Ended
	Apr. 17, 2017	Jul. 07, 2016	Oct. 14, 2015	Oct. 15, 2014	Apr. 18, 2013	Aug. 09, 2012	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Principal Balance							$ 8,775,000,000	$ 8,875,000,000
Fair Value							8,833,876,000	8,844,682,000
Carrying Value							8,678,705,000	8,775,583,000
Less: current maturities of long-term debt							(772,517,000)	(627,157,000)
Total long-term debt, net of current maturities							7,906,188,000	8,148,426,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal Balance							150,000,000	390,000,000
Fair Value							150,000,000	390,000,000
Carrying Value							$ 150,000,000	390,000,000
Debt instrument, maturity date							Feb. 05, 2020
2014 Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance							$ 750,000,000	750,000,000
Fair Value							771,563,000	763,125,000
Carrying Value							$ 738,023,000	736,992,000
Debt instrument, maturity date							Jul. 15, 2022
2016 Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance							$ 1,100,000,000	1,100,000,000
Fair Value							1,117,875,000	1,083,500,000
Carrying Value							$ 1,080,093,000	1,078,954,000
Debt instrument, maturity date							Sep. 01, 2024
2012-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance								610,000,000
Fair Value								610,165,000
Carrying Value								607,157,000
Debt instrument, maturity date						Dec. 09, 2042	Dec. 11, 2017
2013-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 425,000,000	425,000,000
Fair Value							423,763,000	423,381,000
Carrying Value							$ 423,618,000	422,768,000
Debt instrument, maturity date					Apr. 09, 2043		Apr. 10, 2018
2013-2C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 575,000,000	575,000,000
Fair Value							587,386,000	563,322,000
Carrying Value							$ 568,072,000	567,545,000
Debt instrument, maturity date					Apr. 09, 2048		Apr. 11, 2023
2013-1D Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 330,000,000	330,000,000
Fair Value							330,234,000	334,521,000
Carrying Value							$ 328,898,000	328,225,000
Debt instrument, maturity date					Apr. 09, 2043		Apr. 10, 2018
2014-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 920,000,000	920,000,000
Fair Value							922,456,000	922,199,000
Carrying Value							$ 913,563,000	912,219,000
Debt instrument, maturity date				Oct. 11, 2044			Oct. 08, 2019
2014-2C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 620,000,000	620,000,000
Fair Value							623,813,000	608,921,000
Carrying Value							$ 613,047,000	612,641,000
Debt instrument, maturity date				Oct. 08, 2049			Oct. 08, 2024
2015-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 500,000,000	500,000,000
Fair Value							502,830,000	495,145,000
Carrying Value							$ 492,372,000	491,289,000
Debt instrument, maturity date			Oct. 10, 2045				Oct. 08, 2020
2016-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 700,000,000	700,000,000
Fair Value							697,620,000	688,072,000
Carrying Value							$ 692,201,000	691,322,000
Debt instrument, maturity date		Jul. 10, 2046					Jul. 09, 2021
2017-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 760,000,000
Fair Value							760,129,000
Carrying Value							$ 750,520,000
Debt instrument, maturity date	Apr. 09, 2047						Apr. 11, 2022
2014 Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance							$ 1,455,000,000	1,462,500,000
Fair Value							1,456,819,000	1,467,984,000
Carrying Value							$ 1,445,690,000	1,452,039,000
Debt instrument, maturity date							Mar. 24, 2021
2015 Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance							$ 490,000,000	492,500,000
Fair Value							489,388,000	494,347,000
Carrying Value							$ 482,608,000	$ 484,432,000
Debt instrument, maturity date							Jun. 10, 2022