Senior Notes Call Premium

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ References

No definition available.

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

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Long-Term Debt Long Term Debt (Senior Notes) (Details) - USD ($)				12 Months Ended
	Apr. 07, 2016	Jul. 20, 2015	Apr. 01, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 23, 2018
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt				$ 0	$ 2,835,000,000	$ 1,400,000,000
Senior Notes [Member] \| 6.250% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt face amount	$ 800,000,000
Stated interest rate	6.25%			6.25%
Proceeds from issuance of long-term debt	$ 789,000,000
Senior Notes [Member] \| 5.500% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt face amount		$ 600,000,000.0
Stated interest rate		5.50%		5.50%
Proceeds from issuance of long-term debt		$ 593,000,000
Senior Notes [Member] \| 6.375% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt face amount			$ 800,000,000.0
Stated interest rate			6.375%	6.375%
Proceeds from issuance of long-term debt			$ 787,000,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Stated interest rate							5.875%
Subsequent Event [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount							$ 2,200,000,000.0
Subsequent Event [Member] \| Senior Notes [Member] \| 6.250% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Senior Notes Call Premium							32,000,000
Subsequent Event [Member] \| Senior Notes [Member] \| 5.500% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Senior Notes Call Premium							17,000,000
Subsequent Event [Member] \| Senior Notes [Member] \| 6.375% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes Call Premium							44,000,000
Subsequent Event [Member] \| Senior Notes [Member] \| Four Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Debt face amount							$ 1,000,000,000.0
Stated interest rate							4.875%
Subsequent Event [Member] \| Senior Notes [Member] \| Five Point Five Zero Zero Percentage Senior Notes Due Two Thousand Twenty Six [Member]
Debt Instrument [Line Items]
Debt face amount							$ 800,000,000
Stated interest rate							5.50%
Subsequent Event [Member] \| Senior Notes [Member] \| Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty Eight [Member]
Debt Instrument [Line Items]
Debt face amount							$ 400,000,000