The amount of redeemable principal amount of senior notes.

No definition available.

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The principal amount of debt redeemed by the issuer.

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Represents the fixed charge coverage ratio relating to the debt agreement.

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Represents the number of days for extensions on customary terms relating to escrow notes issued by the entity, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Represents the number of days threshold relating to the debt threshold per the debt agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the threshold amount allowed to be outstanding per the debt agreement.

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Represents the threshold amount of availability on the revolving credit facility, below which the entity is required to maintain a specified minimum fixed charge coverage ratio per the covenant terms.

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Represents the threshold amount of debt per the agreement.

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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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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in and after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of principal amount of debt redeemed.

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Face (par) amount of the original debt instrument that was repurchased.

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Amount, after accumulated amortization, of debt premium.

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Weighted average interest rate of debt outstanding.

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Gross amount of debt extinguished.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Indebtedness and Credit Agreement (Details) $ / shares in Units, shares in Thousands, $ in Thousands						1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 19, 2018 USD ($)	Apr. 12, 2018	Mar. 29, 2018 USD ($)	Feb. 27, 2018 USD ($)	Aug. 15, 2015 USD ($)	Feb. 28, 2018 USD ($)	May 30, 2015 USD ($) shares	Aug. 29, 2015 USD ($)	Mar. 03, 2018 USD ($)	Feb. 27, 2016 USD ($)	Jan. 31, 2018 USD ($)	Jan. 03, 2018 $ / shares	Mar. 04, 2017 USD ($)	Apr. 02, 2015 USD ($)	Jan. 15, 2015 USD ($)
Indebtedness and credit agreements
Long-term debt									$ 3,889,738				$ 7,263,378
Lease financing obligations									52,554				65,315
Total Debt									3,942,292				7,328,693
Current maturities of long-term debt and lease financing obligations									(20,761)				(17,709)
Long-term debt and lease financing obligations, less current maturities									3,921,261				$ 7,307,358
Loss on debt retirements, net						$ 8,180			$ 8,180	$ 33,205
Credit facility
Ownership interest (as a percent)									100.00%
Par value (in dollars per share) \| $ / shares												$ 1.00
Interest Rates and Maturities
Annual weighted average rate (as a percent)									7.10%	5.40%			5.40%
Maturities
2019									$ 90
2020									0
2021									902,000
2022									810,000
2023 and thereafter									2,223,000
Senior secured credit facility
Indebtedness and credit agreements
Long-term debt									(12,986)
Long-term debt													$ 3,368,574
Senior secured revolving credit facility due January 2020
Indebtedness and credit agreements
Long-term debt									(13,076)
Long-term debt													2,405,082
Principal amount of debt									0				2,430,000
Unamortized debt issuance costs									13,076				24,918
Credit facility
Maximum borrowing capacity						$ 3,000,000					$ 3,700,000				$ 3,000,000
Outstanding borrowings									0
Letters of credit outstanding									58,043
Additional borrowing capacity									2,941,957
Amount of debt allowed to be outstanding									1,500,000
Threshold amount of debt									$ 750,000
Number of days relating to debt threshold									90 days
Period allowed for extensions on customary terms									90 days
Availability under revolving credit facility									$ 2,941,957
Senior secured revolving credit facility due January 2020 \| Minimum
Credit facility
Percentage of fee payable on daily unused revolver availability									0.25%
Additional borrowing capacity									$ 365,000
Threshold availability on the thirtieth consecutive calendar day									$ 250,000
Fixed charge coverage ratio									1.00
Senior secured revolving credit facility due January 2020 \| Maximum
Credit facility
Percentage of fee payable on daily unused revolver availability									0.375%
Threshold availability on revolving credit facility to trigger fixed charge coverage requirements									$ 200,000
Threshold availability on the third consecutive business day									$ 250,000
Senior secured revolving credit facility due January 2020 \| LIBOR \| Minimum
Credit facility
Percentage points added to the reference rate									1.50%
Senior secured revolving credit facility due January 2020 \| LIBOR \| Maximum
Credit facility
Percentage points added to the reference rate									2.00%
Senior secured revolving credit facility due January 2020 \| Alternate base rate \| Minimum
Credit facility
Percentage points added to the reference rate									0.50%
Senior secured revolving credit facility due January 2020 \| Alternate base rate \| Maximum
Credit facility
Percentage points added to the reference rate									1.00%
8.00% senior secured notes (senior lien) due August 2020
Indebtedness and credit agreements
Debt instrument, stated interest rate (as a percent)					8.00%
Notes redeemed and discharged					$ 650,000
Loss on debt retirements, net								$ 33,205
Tranche 1 Term Loan (second lien) due August 2020
Indebtedness and credit agreements
Long-term debt													465,833
Principal amount of debt									$ 0				470,000
Unamortized debt issuance costs									0				4,167
Tranche 2 Term Loan (second lien) due June 2021
Indebtedness and credit agreements
Long-term debt													497,569
Principal amount of debt									0				500,000
Unamortized debt issuance costs									0				2,431
Other secured
Indebtedness and credit agreements
Long-term debt									90				90
Guaranteed Unsecured Debt
Indebtedness and credit agreements
Long-term debt									3,481,891				3,474,200
9.25% senior notes due March 2020
Indebtedness and credit agreements
Long-term debt									$ 898,476				$ 896,544
Debt instrument, stated interest rate (as a percent)									9.25%				9.25%
Principal amount of debt									$ 902,000				$ 902,000
Unamortized debt issuance costs									4,924				7,527
Unamortized premium									1,400				2,071
Credit facility
Offer to purchase of outstanding amount				$ 900,000
Principal amount of debt redeemed			$ 3,454
Percentage of outstanding principal amount redeemed		99.62%	0.38%
6.75% senior notes due June 2021
Indebtedness and credit agreements
Long-term debt									$ 805,123				$ 803,640
Debt instrument, stated interest rate (as a percent)									6.75%				6.75%
Principal amount of debt									$ 810,000				$ 810,000
Unamortized debt issuance costs									4,877				6,360
Credit facility
Principal amount of debt redeemed			$ 3,471
Percentage of outstanding principal amount redeemed			0.43%
6.125% senior notes due 2023
Indebtedness and credit agreements
Long-term debt									$ 1,778,292				$ 1,774,016
Debt instrument, stated interest rate (as a percent)									6.125%				6.125%
Principal amount of debt									$ 1,800,000				$ 1,800,000
Unamortized debt issuance costs									21,708				25,984
Credit facility
Principal amount of debt redeemed			$ 41,751
Percentage of outstanding principal amount redeemed			2.32%
6.125% senior notes due 2023 \| EnvisionRx
Indebtedness and credit agreements
Debt instrument, stated interest rate (as a percent)														6.125%
Principal amount of debt														$ 1,800,000
6.75% and 6.125% senior notes
Credit facility
Offer to purchase of outstanding amount	$ 700,000
Unguaranteed Unsecured Debt
Indebtedness and credit agreements
Long-term debt									420,833				420,604
8.5% convertible notes due May 2015
Indebtedness and credit agreements
Debt instrument, stated interest rate (as a percent)							8.50%
Convertible notes amount							$ 64,089
Shares issued for EnvisionRx acquisition (in shares) \| shares							24,762
Face amount of debt repurchased							$ 79
7.7% notes due February 2027
Indebtedness and credit agreements
Long-term debt									$ 293,540				$ 293,375
Debt instrument, stated interest rate (as a percent)									7.70%				7.70%
Principal amount of debt									$ 295,000				$ 295,000
Unamortized debt issuance costs									1,460				1,625
6.875% fixed-rate senior notes due December 2028
Indebtedness and credit agreements
Long-term debt									$ 127,293				$ 127,229
Debt instrument, stated interest rate (as a percent)									6.875%				6.875%
Principal amount of debt									$ 128,000				$ 128,000
Unamortized debt issuance costs									$ 707				$ 771