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Indebtedness and Credit Agreements (Details) shares in Thousands, $ in Thousands	3 Months Ended
	May 28, 2016 USD ($) loan	May 30, 2015 USD ($) shares	Feb. 27, 2016 USD ($)	Aug. 15, 2015 USD ($)	Apr. 02, 2015 USD ($)	Jan. 13, 2015 USD ($)	Jan. 12, 2015 USD ($)
Indebtedness and credit agreements
Lease financing obligations	$ 75,287		$ 79,653
Total debt	6,974,402		6,994,136
Current maturities of long-term debt and lease financing obligations	(25,640)		(26,848)
Long-term debt and lease financing obligations, less current maturities	$ 6,948,762		6,967,288
Convertible notes amount		$ 64,089
Credit facility
Number of second priority secured term loan facilities \| loan	2
Ownership interest (as a percent)	100.00%
Maturities
Remainder of fiscal 2017	$ 90
2018	0
2019	0
2020	2,080,000
2021	1,372,000
Thereafter	3,533,000
Senior secured credit facility
Indebtedness and credit agreements
Long-term debt	3,010,417		3,027,766
Senior secured revolving credit facility due January 2020
Indebtedness and credit agreements
Long-term debt	2,048,301		2,066,097
Principal amount of debt	2,080,000		2,100,000
Unamortized debt issuance costs	31,699		33,903
Credit facility
Maximum borrowing capacity	3,000,000			$ 3,700,000		$ 3,000,000	$ 1,795,000
Outstanding borrowings	2,080,000
Letters of credit outstanding	69,301
Additional borrowing capacity	1,550,699
Amount of debt allowed to be outstanding	1,500,000
Amount of debt allowed to be outstanding related to Pending Acquisition	1,800,000
Threshold amount of debt	$ 750,000
Number of days relating to debt threshold	90 days
Period allowed for extensions on customary terms	90 days
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%
Tranche 7 Term Loan due February 2020
Credit facility
Amount of debt repurchased						$ 1,143,650
8.00% senior secured notes (senior lien) due August 2020
Indebtedness and credit agreements
Debt instrument, stated interest rate (as a percent)	8.00%					8.00%
Tranche 1 Term Loan (second lien) due August 2020
Indebtedness and credit agreements
Long-term debt	$ 464,892		464,586
Principal amount of debt	470,000		470,000
Unamortized debt issuance costs	$ 5,108		5,414
Tranche 1 Term Loan (second lien) due August 2020 \| LIBOR
Credit facility
Percentage points added to the reference rate	4.75%
LIBOR floor (as a percent)	1.00%
Tranche 1 Term Loan (second lien) due August 2020 \| Citibank's base rate
Credit facility
Percentage points added to the reference rate	3.75%
Tranche 2 Term Loan (second lien) due June 2021
Indebtedness and credit agreements
Long-term debt	$ 497,134		496,993
Principal amount of debt	500,000		500,000
Unamortized debt issuance costs	$ 2,866		3,007
Tranche 2 Term Loan (second lien) due June 2021 \| LIBOR
Credit facility
Percentage points added to the reference rate	3.875%
LIBOR floor (as a percent)	1.00%
Tranche 2 Term Loan (second lien) due June 2021 \| Citibank's base rate
Credit facility
Percentage points added to the reference rate	2.875%
Other secured
Indebtedness and credit agreements
Long-term debt	$ 90		90
Unsecured Guaranteed Debt
Indebtedness and credit agreements
Long-term debt	3,468,271		3,466,348
9.25% senior notes due March 2020
Indebtedness and credit agreements
Long-term debt	895,046		894,563
Principal amount of debt	902,000		902,000
Unamortized debt issuance costs	9,529		10,180
Unamortized premium	$ 2,575		$ 2,743
Debt instrument, stated interest rate (as a percent)	9.25%		9.25%
6.75% senior notes due June 2021
Indebtedness and credit agreements
Long-term debt	$ 802,499		$ 802,128
Principal amount of debt	810,000		810,000
Unamortized debt issuance costs	$ 7,501		$ 7,872
Debt instrument, stated interest rate (as a percent)	6.75%		6.75%
6.125% senior notes due 2023
Indebtedness and credit agreements
Long-term debt	$ 1,770,726		$ 1,769,657
Principal amount of debt	1,800,000		1,800,000
Unamortized debt issuance costs	$ 29,274		$ 30,343
Debt instrument, stated interest rate (as a percent)	6.125%		6.125%
Unsecured Unguaranteed Debt
Indebtedness and credit agreements
Long-term debt	$ 420,427		$ 420,369
8.5% convertible notes due May 2015
Indebtedness and credit agreements
Debt instrument, stated interest rate (as a percent)	8.50%	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	$ 293,248		293,206
Principal amount of debt	295,000		295,000
Unamortized debt issuance costs	$ 1,752		$ 1,794
Debt instrument, stated interest rate (as a percent)	7.70%		7.70%
6.875% fixed-rate senior notes due December 2028
Indebtedness and credit agreements
Long-term debt	$ 127,179		$ 127,163
Principal amount of debt	128,000		128,000
Unamortized debt issuance costs	$ 821		$ 837
Debt instrument, stated interest rate (as a percent)	6.875%		6.875%
EnvisionRx \| 6.125% senior notes due 2023
Indebtedness and credit agreements
Principal amount of debt					$ 1,800,000
Debt instrument, stated interest rate (as a percent)					6.125%