The total amount of cash paid during the period to redeem/convert long-term debt.

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- Definition

Debt redemption price per $1,000 of par value.

+ Details

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- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 26

+ Details

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 21
-Paragraph 16, 20

+ Details

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

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- Definition

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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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ Details

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- Definition

The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ Details

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- Definition

Fixed interest rate related to the interest rate derivative.

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

+ Details

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- Definition

Gross amount of debt extinguished.

+ Details

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- Definition

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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- Definition

Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 26
-Paragraph 20, 21

+ Details

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- Definition

Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.

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Debt Senior Notes (Details) (USD $)	12 Months Ended		0 Months Ended		0 Months Ended		0 Months Ended					1 Months Ended		1 Months Ended
Debt Senior Notes (Details) (USD $)	Dec. 31, 2010	Dec. 31, 2009	Nov. 20, 2009 2.15% Senior Notes due 2012 [Member]	Dec. 31, 2010 2.15% Senior Notes due 2012 [Member]	Nov. 20, 2009 3.25% Senior Notes due 2014 [Member]	Dec. 31, 2010 3.25% Senior Notes due 2014 [Member]	Apr. 27, 2010 3.20% Senior Notes due 2015 [Member]	Dec. 31, 2010 3.20% Senior Notes due 2015 [Member]	Dec. 31, 2005 5% Senior Notes due 2015 [Member]	Apr. 27, 2010 4.70% Senior Notes due 2020 [Member]	Nov. 09, 2006 6 1/8% Senior Subordinated Notes due 2015 [Member]	Jul. 31, 2010 6 1/8% Senior Subordinated Notes due 2015 [Member]	Nov. 09, 2006 6 3/4% Senior Subordinated Notes due 2014 [Member]	Dec. 31, 2009 6 3/4% Senior Subordinated Notes due 2014 [Member]	Feb. 22, 2011 Senior Notes Issued Subsequent To Balance Sheet Date [Member]
Debt Issuance [Line Items]
Face Amount Issued			$ 350,000,000		$ 400,000,000		$ 450,000,000		$ 250,000,000	$ 300,000,000	$ 500,000,000		$ 300,000,000		$ 2,200,000,000
Debt Instrument, Interest Rate, Stated Percentage			2.15%		3.25%		3.20%		5.00%	4.70%	6.125%		6.75%
Notional Amount of Interest Rate Swap			350,000,000		400,000,000		450,000,000
Interest Rate Swap, Description Of Variable Rate Basis			3 month USD LIBOR		3 month USD LIBOR		six-month USD LIBOR
Interest Rate Swap, Basis Spread On Variable Rate				0.4194%		0.7245%		0.4512%
Interest Rate Swap, Variable Interest Rate				0.72%		1.01%		0.90%
Interest Rate Swap, Fixed Interest Rate				2.15%		3.25%		3.20%
Net Unrealized Losses on Hedging Instruments, Net of Tax	800,000	1,000,000							2,000,000
Extinguishment Of Debt [Line Items]
Extinguishment Of Debt Amount												500,000,000		300,000,000
Redemption Price per $1000 of Par Value												1,030.63		1,033.75
Extinguishment of Debt, Total Cash Outlay												515,000,000		317,000,000
Gains (Losses) On Extinguishment Of Debt	$ (17,000,000)	$ (15,000,000)										$ (15,000,000)		$ (5,000,000)