Borrowings - Narrative (Details) - USD ($)		1 Months Ended
Mar. 31, 2020	Mar. 31, 2020	Jun. 30, 2020
Debt Instrument [Line Items]
Proceeds from debt	$ 3,950,000,000
Payments for derivative instruments		$ 7,000,000
Loss on net cash flow hedges		5,000,000
Senior Notes \| 3.625% senior notes due April 2027
Debt Instrument [Line Items]
Face amount of debt	$ 750,000,000	$ 750,000,000
Debt interest rate	3.625%	3.625%	3.625%
Senior Notes \| 3.75% senior notes due April 2030
Debt Instrument [Line Items]
Face amount of debt	$ 1,500,000,000	$ 1,500,000,000
Debt interest rate	3.75%	3.75%	3.75%
Senior Notes \| 4.125% senior notes due April 2040
Debt Instrument [Line Items]
Face amount of debt	$ 1,000,000,000.0	$ 1,000,000,000.0
Debt interest rate	4.125%	4.125%	4.125%
Senior Notes \| 4.25% senior notes due April 2050
Debt Instrument [Line Items]
Face amount of debt	$ 750,000,000	$ 750,000,000
Debt interest rate	4.25%	4.25%	4.25%

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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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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The net cash outflow or inflow from derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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