Long Term Debt - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended
	Aug. 30, 2012	Sep. 08, 2012	Feb. 25, 2012
Debt Instrument [Line Items]
Line of credit facility amount		$ 200,000,000
Line of credit facility amount outstanding	280,000,000	150,000,000
Payment of financing costs	59,000,000
Perfected first-priority mortgage lien and security interest grants term		90 days
Ground-leased real estate and associated equipment pledged as collateral		1,146,000,000
Prepayment fee		1.00%
Net cash proceeds from sale of assets		50.00%
Aggregate commitments under the Revolving ABL Credit Facility		10.00%
Assets collateralized by the ABL Credit Facility		2,206,000,000
Rate of Outstanding Borrowings		2.01%
Facility fee in accordance of current credit rating		0.70%
Account receivable pledged as collateral		285,000,000
Debt with current maturities that are classified in Long-term debt		28,000,000	28,000,000
Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Term of credit facility	6 years
Interest rate addition to base rate	6.75%	6.75%
Line of credit facility amount outstanding	850,000,000	850,000,000
LIBOR floor rate	1.25%	1.25%
Line of credit facility amount outstanding, current		9,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding	1,500,000,000
Maturity date	April 2015
Term Loan B-2 [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding	574,000,000
Maturity date	October 2015
Term Loan B-3 [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding	446,000,000
Maturity date	April 2018
Revolving ABL Credit Facility [Member]
Debt Instrument [Line Items]
Term of credit facility	5 years
Line of credit facility amount	1,650,000,000
Line of credit facility amount outstanding		464,000,000
Facility fees		0.375%
Letter of credit outstanding		353,000,000
Maximum letter of credit fee		2.125%
Unused credit		$ 816,000,000
Minimum [Member] | Revolving ABL Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate addition to base rate	1.75%	1.00%
Facility fees	0.25%
Interest rate at the rate of ("Prime plus")	0.75%
Maximum [Member] | Revolving ABL Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate addition to base rate	2.25%	2.00%
Facility fees	0.375%
Interest rate at the rate of ("Prime plus")	1.25%