Debt (Schedule Of Carrying And Principal Values Of Debt) (Details) - USD ($)							12 Months Ended
	Jul. 07, 2016	Oct. 14, 2015	Oct. 15, 2014	Apr. 18, 2013	Aug. 09, 2012	Apr. 16, 2010	Dec. 31, 2016	Aug. 15, 2016	Dec. 31, 2015	Sep. 28, 2012	Jul. 13, 2012
Debt Instrument [Line Items]
Principal Balance							$ 8,875,000,000		$ 8,555,000,000
Fair Value							8,844,682,000		8,525,291,000
Carrying Value							8,775,583,000		8,452,070,000
Less: current maturities of long-term debt							(627,157,000)		(20,000,000)
Total long-term debt, net of current maturities							8,148,426,000		8,432,070,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal Balance							390,000,000
Fair Value							390,000,000
Carrying Value							$ 390,000,000
Debt instrument, maturity date							Feb. 05, 2020
5.625% Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance									500,000,000
Fair Value									521,250,000
Carrying Value									494,955,000
Debt instrument, maturity date							Oct. 01, 2019
Debt instrument, interest rate, stated percentage							5.625%			5.625%
5.75% Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance									800,000,000
Fair Value									832,000,000
Carrying Value									791,243,000
Debt instrument, maturity date							Jul. 15, 2020
Debt instrument, interest rate, stated percentage							5.75%				5.75%
2014 Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance							$ 750,000,000		750,000,000
Fair Value							763,125,000		744,375,000
Carrying Value							$ 736,992,000		735,010,000
Debt instrument, maturity date							Jul. 15, 2022
2016 Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance							$ 1,100,000,000
Fair Value							1,083,500,000
Carrying Value							$ 1,078,954,000
Debt instrument, maturity date							Sep. 01, 2024
Debt instrument, interest rate, stated percentage								4.875%
2010-2C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance									550,000,000
Fair Value									558,223,000
Carrying Value									548,268,000
Debt instrument, maturity date						Apr. 09, 2042	Apr. 11, 2017
Debt instrument, interest rate, stated percentage						5.101%
2012-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 610,000,000		610,000,000
Fair Value							610,165,000		611,879,000
Carrying Value							$ 607,157,000		604,229,000
Debt instrument, maturity date					Dec. 09, 2042		Dec. 11, 2017
Debt instrument, interest rate, stated percentage					2.933%
2013-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 425,000,000		425,000,000
Fair Value							423,381,000		416,959,000
Carrying Value							$ 422,768,000		421,099,000
Debt instrument, maturity date				Apr. 09, 2043			Apr. 10, 2018
Debt instrument, interest rate, stated percentage				2.24%
2013-2C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 575,000,000		575,000,000
Fair Value							563,322,000		565,541,000
Carrying Value							$ 567,545,000		566,523,000
Debt instrument, maturity date				Apr. 09, 2048			Apr. 11, 2023
Debt instrument, interest rate, stated percentage				3.722%
2013-1D Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 330,000,000		330,000,000
Fair Value							334,521,000		332,676,000
Carrying Value							$ 328,225,000		326,918,000
Debt instrument, maturity date				Apr. 09, 2043			Apr. 10, 2018
Debt instrument, interest rate, stated percentage				3.598%
2014-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 920,000,000		920,000,000
Fair Value							922,199,000		910,368,000
Carrying Value							$ 912,219,000		909,595,000
Debt instrument, maturity date			Oct. 11, 2044				Oct. 08, 2019
Debt instrument, interest rate, stated percentage			2.898%
2014-2C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 620,000,000		620,000,000
Fair Value							608,921,000		608,084,000
Carrying Value							$ 612,641,000		611,853,000
Debt instrument, maturity date			Oct. 08, 2049				Oct. 08, 2024
Debt instrument, interest rate, stated percentage			3.869%
2015-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 500,000,000		500,000,000
Fair Value							495,145,000		489,680,000
Carrying Value							$ 491,289,000		489,496,000
Debt instrument, maturity date		Oct. 10, 2045					Oct. 08, 2020
Debt instrument, interest rate, stated percentage		3.156%
2016-1C Tower Securities [Member]
Debt Instrument [Line Items]
Principal Balance							$ 700,000,000
Fair Value							688,072,000
Carrying Value							$ 691,322,000
Debt instrument, maturity date	Jul. 10, 2046						Jul. 09, 2021
Debt instrument, interest rate, stated percentage	2.877%
2014 Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance							$ 1,462,500,000		1,477,500,000
Fair Value							1,467,984,000		1,447,950,000
Carrying Value							$ 1,452,039,000		1,464,774,000
Debt instrument, maturity date							Mar. 24, 2021
2015 Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance							$ 492,500,000		497,500,000
Fair Value							494,347,000		486,306,000
Carrying Value							$ 484,432,000		$ 488,107,000
Debt instrument, maturity date							Jun. 10, 2022