Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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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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 cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Debt - Senior Unsecured Notes (Details) - USD ($)					1 Months Ended	3 Months Ended			6 Months Ended
Debt - Senior Unsecured Notes (Details) - USD ($)	Jun. 24, 2020	Nov. 21, 2019	Jul. 22, 2019	Jul. 08, 2019	Jul. 31, 2019	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jul. 31, 2020	Jun. 23, 2020	Dec. 31, 2019	Jul. 05, 2019
Debt Instrument
Principal balance on debt							$ 6,770,260,000		$ 6,770,260,000
Loss on extinguishment of debt							25,824,000	$ 1,135,000	24,991,000	$ 1,135,000
Senior Unsecured Note
Debt Instrument
Principal balance on debt							$ 6,050,000,000		$ 6,050,000,000
Senior Unsecured Note \| 2031 Notes
Debt Instrument
Face amount												$ 600,000,000
Percentage of stated interest rate												2.875%
Senior Unsecured Note \| Unsecured noted 4.250 Percent
Debt Instrument
Face amount	$ 250,000,000
Percentage of stated interest rate	4.25%			4.25%
Repayment of senior unsecured notes				$ 250,000,000
Senior Unsecured Note \| 2023 Notes
Debt Instrument
Percentage of stated interest rate													4.25%
Loss on extinguishment of debt	$ (26,000,000)
Senior Unsecured Note \| 2022 Notes
Debt Instrument
Percentage of stated interest rate				4.00%									4.00%
Repayment of senior unsecured notes				$ 250,000,000
Senior Unsecured Note \| 2026 Notes
Debt Instrument
Face amount								$ 650,000,000		$ 650,000,000				$ 650,000,000
Percentage of stated interest rate								3.25%		3.25%				3.25%
Senior Unsecured Note \| 2029 Notes
Debt Instrument
Face amount								$ 650,000,000		$ 650,000,000				$ 650,000,000
Percentage of stated interest rate								3.50%		3.50%				3.50%
Senior Unsecured Note \| 2030 Notes
Debt Instrument
Face amount		$ 750,000,000
Percentage of stated interest rate		3.00%
Senior Unsecured Note \| Unsecured noted 4.000 Percent
Debt Instrument
Percentage of stated interest rate		4.00%
Repayment of senior unsecured notes		$ 350,000,000
Loss on extinguishment of debt		$ 22,000,000
Senior Unsecured Note \| 2020 Notes
Debt Instrument
Percentage of stated interest rate			2.625%										2.625%
Repayment of senior unsecured notes			$ 800,000,000
Senior Unsecured Note \| Senior Notes Due 2020, 2022, and 2023
Debt Instrument
Loss on extinguishment of debt					$ 35,000,000
Subsequent Event \| Senior Unsecured Note \| 2022 Notes
Debt Instrument
Face amount											$ 300,000,000
Percentage of stated interest rate											3.15%
Forecast \| Senior Unsecured Note \| 2022 Notes
Debt Instrument
Loss on extinguishment of debt						$ (18,000,000)