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Debt - Narrative (Details)														12 Months Ended
	Mar. 18, 2022 USD ($) $ / shares	Jan. 28, 2022 USD ($)	Aug. 10, 2021 USD ($)	May 20, 2021 USD ($) $ / shares	Sep. 14, 2020 USD ($)	May 26, 2020 USD ($) $ / shares	Mar. 10, 2020 USD ($)	Mar. 05, 2020 USD ($) $ / shares	Feb. 04, 2020 USD ($) $ / shares	Jan. 31, 2020 USD ($) $ / shares	Nov. 11, 2019 USD ($) $ / shares	Nov. 04, 2019 USD ($)	Feb. 09, 2017 USD ($) seniorNote	Apr. 01, 2022 USD ($) $ / shares	Apr. 02, 2021 USD ($) $ / shares	Apr. 03, 2020 USD ($) $ / shares	Jul. 13, 2021 $ / shares	May 07, 2021 USD ($)	Sep. 15, 2020 USD ($)	Aug. 01, 2016 USD ($)	Mar. 04, 2016 USD ($)
Debt Instrument [Line Items]
Long-term debt														$ 3,736,000,000	$ 3,601,000,000
Aggregater principal amount														3,747,000,000	3,620,000,000
Gain (loss) on extinguishment of debt														(3,000,000)	20,000,000	$ 0
Special dividend (in dollars per share) | $ / shares											$ 12
Extinguishment of debt with borrowings from the same creditors														494,000,000	0	1,073,000,000
Payment for debt extinguishment														0	0	546,000,000
Payment of accrued interest														$ 120,000,000	139,000,000	179,000,000
Share price (in dollars per share) | $ / shares														$ 26.94			$ 27.20
Senior Notes
Debt Instrument [Line Items]
Number of debt instrument | seniorNote													2
Convertible Debt
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt									$ 2,000,000
Conversion period prior to maturity dates										6 months
Payments in lieu of conversion price adjustments														$ 8,000,000	12,000,000	$ 11,000,000
Initial Term Loan due May 7, 2026
Debt Instrument [Line Items]
Debt instrument term												5 years
Debt Instrument, face amount												$ 500,000,000
Delayed Term Loan due May 7, 2026
Debt Instrument [Line Items]
Debt instrument term												5 years
Debt Instrument, face amount												$ 750,000,000
Quarterly installment payment (as a percent)												1.25%
Delayed Draw Term Loan Due November 4, 2024
Debt Instrument [Line Items]
Amount drawn from credit agreement					$ 750,000,000
First Amendment Additional Term Loan
Debt Instrument [Line Items]
Debt Instrument, face amount																		$ 525,000,000
Credit Agreement, First Amendment
Debt Instrument [Line Items]
Long-term debt																		$ 1,741,000,000
Quarterly installment payment (as a percent)																		1.25%
2019 Credit Facility
Debt Instrument [Line Items]
Leverage ratio												5.25
Leverage ratio if acquisition incurred												5.75
Aggregate acquisition amount benchmark												$ 250,000,000
2019 Credit Facility | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate												0.125%
2019 Credit Facility | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate												1.125%
2019 Credit Facility | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate												0.75%
2019 Credit Facility | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate												1.75%
5.0% Senior Notes due April 15, 2025 | Senior Notes
Debt Instrument [Line Items]
Aggregater principal amount													$ 1,100,000,000
Stated interest rate													5.00%
4.2% Senior Notes Due September 15, 2020 | Senior Notes
Debt Instrument [Line Items]
Debt Instrument, face amount																			$ 750,000,000
Stated interest rate													4.20%						4.20%
3.95% Senior Notes due June 15, 2022 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate													3.95%
2.5% Convertible Senior Notes due April 1, 2022 | Convertible Debt
Debt Instrument [Line Items]
Debt Instrument, face amount																					$ 500,000,000
Stated interest rate				2.50%			2.50%		2.50%		2.50%										2.50%
Extinguishment of debt with borrowings from the same creditors											$ 250,000,000
Conversion price (in dollars per share) | $ / shares																$ 8.40
2.0% Convertible Senior Notes due August 15, 2022 | Convertible Debt
Debt Instrument [Line Items]
Debt Instrument, face amount																				$ 1,250,000,000
Stated interest rate						2.00%			2.00%		2.00%									2.00%
Extinguishment of debt with borrowings from the same creditors											$ 625,000,000
Conversion price (in dollars per share) | $ / shares																10.23
Payment for debt extinguishment						$ 1,176,000,000
Exchange and extinguishment of convertible notes, equity adjustment						578,000,000
New 2.5% Convertible Senior Notes due April 1, 2022 | Convertible Debt
Debt Instrument [Line Items]
Debt Instrument, face amount				$ 250,000,000				$ 250,000,000		$ 250,000,000
Long-term debt															250,000,000
Aggregater principal amount															$ 250,000,000
Stated interest rate				2.50%				2.50%	2.50%		2.50%
Gain (loss) on extinguishment of debt				$ (2,000,000)			$ (1,000,000)
Cash notes payments per share (in dollars per share) | $ / shares											$ 12
Conversion ratio									0.0596341	0.1189814
Conversion price (in dollars per share) | $ / shares				$ 24.40				$ 19	$ 16.77	$ 8.40					$ 16.77	16.77
Cash note payments									$ 179,000,000
Payment for debt extinguishment				$ 364,000,000				$ 566,000,000
Payment of accrued interest				1,000,000				2,000,000
Payments in lieu of conversion price adjustments				1,000,000				$ 1,000,000
Exchange and extinguishment of convertible notes, equity adjustment				$ 112,000,000			$ 316,000,000
New 2.0% Convertible Senior Notes due August 15, 2022 | Convertible Debt
Debt Instrument [Line Items]
Debt Instrument, face amount	$ 100,000,000					$ 625,000,000				$ 625,000,000
Long-term debt														524,000,000	$ 620,000,000
Aggregater principal amount														$ 525,000,000	$ 625,000,000
Stated interest rate	2.00%					2.00%			2.00%		2.00%			2.00%
Gain (loss) on extinguishment of debt	$ 1,000,000					$ 20,000,000
Cash notes payments per share (in dollars per share) | $ / shares											$ 12
Conversion ratio									0.0489860	0.0977364
Conversion price (in dollars per share) | $ / shares	$ 28.32					$ 19.25			$ 20.41	$ 10.23				$ 20.41	$ 20.41	$ 20.41
Cash note payments									$ 367,000,000
Payment for debt extinguishment	$ 139,000,000
Payment of accrued interest						$ 3,000,000
Exchange and extinguishment of convertible notes, equity adjustment	$ 40,000,000
Debt instrument, if-converted, value in excess of principal														$ 168,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity												$ 1,000,000,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit, amount outstanding														$ 0
Revolving Credit Facility | 2019 Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee												0.125%
Revolving Credit Facility | 2019 Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee												0.30%
Term Loan Interim Facility B
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 3,600,000,000
Debt instrument term			7 years
Interim Revolving Facility A1
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 750,000,000
Debt instrument term			60 days
Term Loan Interim Facility A2
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 3,500,000,000
Debt instrument term			5 years
Interim Revolving Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,500,000,000
Debt instrument term			5 years
Line of Credit
Debt Instrument [Line Items]
Line of credit facility increase		$ 500,000,000

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Cash payments in lieu of conversion price adjustment for convertible debt, recognized in equity

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Debt Instrument, Covenant Term, Aggregate Acquisition Amount Benchmark

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Debt Instrument, Covenant Term, Consolidated Leverage Ratio

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Debt Instrument, Covenant Term, Consolidated Leverage Ratio If Acquisition Incurred

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Debt Instrument, Number

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Debt Instrument, Principal Quarterly Installment Payment As Percentage Of Aggregate Principal Amount

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Payments In Lieu Of Conversion Price Adjustments

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Special Dividend

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Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

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The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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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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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The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

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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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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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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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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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