Capped Call Issuance Costs Incurred, Net

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Debt Instrument, Convertible, Conversion Ratio, Percent

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Debt Instrument, Convertible, Threshold Percentage of Conversion Price

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Option Indexed to Issuer's Equity, Cap Price

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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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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No definition available.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

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 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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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, 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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The cash outflow for the settlement of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, as it matures.

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Exercise or strike price stated in the contract for options indexed to the issuer's equity shares.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Long-term Debt (Narrative) (Details)	1 Months Ended		3 Months Ended		9 Months Ended
Long-term Debt (Narrative) (Details)	May 31, 2020 USD ($) Well $ / shares	Jan. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 Rate	Aug. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Aggregate loan commitments							$ 1,500,000,000
Outstanding borrowing							0
Strike price \| $ / shares	$ 109.77
Cap price \| $ / shares	$ 156.21
Net costs	$ 113,000,000
Cash tender offer	725,000,000
Expensed unamortized debt discounts and issuance costs	2,000,000
Loss on early extinguishment of debt	23,000,000		$ 0	$ 0	$ 27,000,000	$ 0
Issuance costs and discounts							(260,000,000)			$ (11,000,000)
Total debt							3,288,000,000			$ 2,289,000,000
Senior notes \| 1.90% Senior notes due 2030 [Member]
Debt Instrument [Line Items]
Principal									$ 1,100,000,000
Stated interest rate \| Rate								1.90%
Issuance costs and discounts							19,000,000
Total debt							1,080,000,000.00
Senior notes \| 0.25% Convertible Senior notes due 2025
Debt Instrument [Line Items]
Principal	$ 1,300,000,000
Stated interest rate	0.25%							0.25%
Initial conversion rate	0.0091098
Initial conversion price \| $ / shares	$ 109.77
Threshold conversion price percent	130.00%
Threshold stock price trigger percent	98.00%
Threshold trading days \| Well	20
Threshold consecutive trading days \| Well	30
Conversion ratio percent	100.00%
Issuance costs and discounts							235,000,000
Total debt							$ 1,088,000,000
Senior notes \| 3.45% Senior Notes due 2021
Debt Instrument [Line Items]
Stated interest rate			3.45%		3.45%			3.45%
Debt settlement amount	$ 360,000,000
Senior notes \| 3.95% Senior notes due 2022
Debt Instrument [Line Items]
Stated interest rate \| Rate								3.95%
Debt settlement amount	356,000,000
Senior notes \| 7.20% Senior notes due 2028
Debt Instrument [Line Items]
Stated interest rate \| Rate								7.20%
Debt settlement amount	$ 9,000,000
Senior notes \| 7.50% Senior notes due 2020
Debt Instrument [Line Items]
Stated interest rate \| Rate								7.50%
Debt principal payment		$ 450,000,000