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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120391452&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

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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Debt - Issuances and Borrowings (Details) - USD ($)			12 Months Ended
Debt - Issuances and Borrowings (Details) - USD ($)	Oct. 28, 2020	Oct. 06, 2020	Dec. 31, 2020	Jun. 24, 2020	Apr. 09, 2020
Debt Instrument [Line Items]
Principal Issuances			$ 54,750,000,000
Premiums, Discounts and Issuance Costs			670,000,000
Net Proceeds from Issuance of Long-Term Debt	$ 4,600,000,000	$ 4,000,000,000.0	54,080,000,000
Senior Secured Notes due 2025, 3.500%
Debt Instrument [Line Items]
Interest rate, stated percentage					3.50%
Principal Issuances			3,000,000,000
Premiums, Discounts and Issuance Costs			12,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 2,988,000,000
Senior Secured Notes due 2027, 3.750%
Debt Instrument [Line Items]
Interest rate, stated percentage			3.75%
Principal Issuances			$ 4,000,000,000
Premiums, Discounts and Issuance Costs			17,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 3,983,000,000
Senior Secured Notes due 2030, 3.875%
Debt Instrument [Line Items]
Interest rate, stated percentage			3.875%
Principal Issuances			$ 7,000,000,000
Premiums, Discounts and Issuance Costs			78,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 6,922,000,000
Senior Secured Notes due 2040, 4.375%
Debt Instrument [Line Items]
Interest rate, stated percentage			4.375%
Principal Issuances			$ 2,000,000,000
Premiums, Discounts and Issuance Costs			47,000,000
Net Proceeds from Issuance of Long-Term Debt			1,953,000,000
Senior Secured Notes due 2050, 4.500%
Debt Instrument [Line Items]
Interest rate, stated percentage					4.50%
Principal Issuances			3,000,000,000
Premiums, Discounts and Issuance Costs			24,000,000
Net Proceeds from Issuance of Long-Term Debt			2,976,000,000
Senior Notes due 2026, 1.500%
Debt Instrument [Line Items]
Interest rate, stated percentage				1.50%
Principal Issuances			1,000,000,000
Premiums, Discounts and Issuance Costs			5,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 995,000,000
Senior Notes due 2028, 2.050%
Debt Instrument [Line Items]
Interest rate, stated percentage			2.05%
Principal Issuances			$ 1,250,000,000
Premiums, Discounts and Issuance Costs			8,000,000
Net Proceeds from Issuance of Long-Term Debt			1,242,000,000
Senior Notes due 2031, 2.550%
Debt Instrument [Line Items]
Interest rate, stated percentage				2.55%
Principal Issuances			1,750,000,000
Premiums, Discounts and Issuance Costs			12,000,000
Net Proceeds from Issuance of Long-Term Debt			1,738,000,000
Senior Notes due 2028, 2.050%, Issued October 6, 2020
Debt Instrument [Line Items]
Interest rate, stated percentage		2.05%
Principal Issuances			500,000,000
Premiums, Discounts and Issuance Costs			(11,000,000)
Net Proceeds from Issuance of Long-Term Debt			$ 511,000,000
Senior Notes due 2031, 2.550%, Issued October 6, 2020
Debt Instrument [Line Items]
Interest rate, stated percentage			2.55%
Principal Issuances			$ 750,000,000
Premiums, Discounts and Issuance Costs			(29,000,000)
Net Proceeds from Issuance of Long-Term Debt			$ 779,000,000
3.000% Senior Secured Notes due 2041
Debt Instrument [Line Items]
Interest rate, stated percentage			3.00%
Principal Issuances			$ 1,250,000,000
Premiums, Discounts and Issuance Costs			15,000,000
Net Proceeds from Issuance of Long-Term Debt			1,235,000,000
3.300% Senior Secured Notes due 2051
Debt Instrument [Line Items]
Interest rate, stated percentage		3.30%
Principal Issuances			1,500,000,000
Premiums, Discounts and Issuance Costs			16,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 1,484,000,000
2.250% Senior Secured Notes due 2031
Debt Instrument [Line Items]
Interest rate, stated percentage	2.25%		2.25%
Principal Issuances			$ 1,000,000,000
Premiums, Discounts and Issuance Costs			5,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 995,000,000
Senior Notes due 2041, 3.000%, Issued October 28, 2020
Debt Instrument [Line Items]
Interest rate, stated percentage			3.00%
Principal Issuances			$ 1,250,000,000
Premiums, Discounts and Issuance Costs			38,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 1,212,000,000
Senior Notes due 2051, 3.300%, Issued October 28, 2020
Debt Instrument [Line Items]
Interest rate, stated percentage			3.30%
Principal Issuances			$ 1,500,000,000
Premiums, Discounts and Issuance Costs			58,000,000
Net Proceeds from Issuance of Long-Term Debt			1,442,000,000
3.600% Senior Secured Notes due 2060
Debt Instrument [Line Items]
Interest rate, stated percentage	3.60%
Principal Issuances			1,000,000,000
Premiums, Discounts and Issuance Costs			11,000,000
Net Proceeds from Issuance of Long-Term Debt			989,000,000
Senior Secured Notes Issued, Total
Debt Instrument [Line Items]
Principal Issuances			31,750,000,000
Premiums, Discounts and Issuance Costs			306,000,000
Net Proceeds from Issuance of Long-Term Debt			31,444,000,000
Secured Bridge Loan Facility \| Bridge Loan
Debt Instrument [Line Items]
Principal Issuances			19,000,000,000
Premiums, Discounts and Issuance Costs			257,000,000
Net Proceeds from Issuance of Long-Term Debt			18,743,000,000
Secured Term Loan Facility due 2027
Debt Instrument [Line Items]
Principal Issuances			4,000,000,000
Premiums, Discounts and Issuance Costs			107,000,000
Net Proceeds from Issuance of Long-Term Debt			3,893,000,000
Secured Loan Facilities Issued, Total
Debt Instrument [Line Items]
Principal Issuances			23,000,000,000
Premiums, Discounts and Issuance Costs			364,000,000
Net Proceeds from Issuance of Long-Term Debt			$ 22,636,000,000