ABR Margin

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- Definition

Applicable Margin

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- Definition

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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- Definition

Letter of Credit Interest Percentage

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Option Indexed to Issuer's Equity, Cap Price

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Rate of Interest on Base Rate Committed Loans In Addition To Federal Fund Rate

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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

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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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No definition available.

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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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No definition available.

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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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Amount, after accumulated amortization, of debt discount.

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

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Gross amount of debt extinguished.

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No definition available.

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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 amount borrowed under the credit facility at any time during the period.

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No definition available.

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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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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit 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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Indebtedness divided by net capital.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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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 and Interest Expense (Narrative) (Details)	1 Months Ended	12 Months Ended			13 Months Ended
	May 31, 2020 USD ($) day $ / shares	Dec. 31, 2020 USD ($) Rate	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 31, 2021 USD ($)	Jan. 12, 2021 USD ($)	Aug. 31, 2020 USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,500,000,000
Outstanding borrowings under the Credit Facility		0
Repayments of debt		1,198,000,000	$ 0	$ 450,000,000
Strike price \| $ / shares	$ 109.77
Cap price \| $ / shares	$ 156.21
Net costs	$ 113,000,000
Issuance costs and discounts		248,000,000	11,000,000
Long-term Debt		3,300,000,000	2,289,000,000
Cash tender offer	725,000,000
Expensed unamortized debt discounts and issuance costs	2,000,000
Gain (Loss) on Extinguishment of Debt	23,000,000	27,000,000	0	0
Amortization of issuance discounts		29,000,000	1,000,000	1,000,000
Amortization of capitalized loan fees		$ 5,000,000	$ 4,000,000	$ 4,000,000
Subsequent event
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 2,000,000,000.0
Credit Facility
Debt Instrument [Line Items]
Federal fund rate \| Rate		0.50%
Alternate base rate spread \| Rate		0.25%
Applicable margin \| Rate		1.25%
Letters of credit outstanding under the Credit Facility, interest percentage \| Rate		0.125%
Unused portion, fee percentage \| Rate		0.15%
Debt instrument covenant description		0.65
3.45% senior notes due 2021
Debt Instrument [Line Items]
Senior Notes, interest rate, percentage \| Rate		3.45%
Swing Line Loans \| Credit Facility
Debt Instrument [Line Items]
Maximum outstanding borrowings under the Credit Facility		$ 150,000,000
Senior notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount		$ (206,000,000)
Senior notes \| 0.25% convertible senior notes due 2025
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,300,000,000
Senior Notes, interest rate, percentage	0.25%	0.25%
Debt Instrument, Convertible, Conversion Price \| $ / shares	$ 109.77
Debt Instrument, Convertible, Threshold Percentage of Conversion Price	130.00%
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	98.00%
Debt Instrument, Convertible, Threshold Trading Days \| day	20
Debt Instrument, Convertible, Conversion Ratio, Percent	100.00%
Issuance costs and discounts		$ 17,000,000
Long-term Debt		1,100,000,000
Amortization of issuance discounts		28,000,000
Debt Instrument, Unamortized Discount	$ (234,000,000)	(206,000,000)
Amortization of capitalized loan fees		2,000,000
Senior notes \| 0.25% convertible senior notes due 2025 \| Long-term Debt
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	19,000,000
Senior notes \| 0.25% convertible senior notes due 2025 \| Additional Paid-in Capital
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	4,000,000
Senior notes \| 1.90% senior notes due 2030
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 1,100,000,000
Issuance costs and discounts		19,000,000
Long-term Debt		$ 1,080,000,000.00
Senior notes \| 3.45% senior notes due 2021
Debt Instrument [Line Items]
Senior Notes, interest rate, percentage \| Rate		3.45%
Debt settlement amount	360,000,000
Senior notes \| 3.95% senior notes due 2022
Debt Instrument [Line Items]
Debt settlement amount	356,000,000
Senior notes \| 7.20% senior notes due 2028
Debt Instrument [Line Items]
Debt settlement amount	$ 9,000,000
Senior notes \| 0.075 \| Subsequent event
Debt Instrument [Line Items]
Maturities of Senior Debt					$ 450,000,000