Debt - Narrative (Details) $ / shares in Units, shares in Millions		1 Months Ended	3 Months Ended
	Aug. 11, 2020 USD ($) shares	Aug. 31, 2020 USD ($)	Mar. 31, 2022 USD ($) day $ / shares shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2021 $ / shares	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Estimated fair value of the note based on the closing trading price (in USD per share) | $ / shares			$ 100		$ 100
Percentage of purchase price of notes which should be paid upon fundamental change (percent)			100.00%
Benefit from exercise of 2022 Note Hedge			$ 21,000,000	$ 102,000,000
2022 Warrants
Debt Instrument [Line Items]
Number of shares to be issued upon exercise of the Warrants (in shares) | shares				0.5
Warrant exercise period			60 days
Number of potential securities issued upon automatic exercise of the Warrants (in shares) | shares			0.6
Stock Price Trigger Measurement
Debt Instrument [Line Items]
Trading days threshold | day			20
Consecutive trading days threshold, total | day			30
Threshold percentage of stock price trigger (percent)			130.00%
Notes Price Trigger Measurement
Debt Instrument [Line Items]
Trading days threshold | day			5
Consecutive trading days threshold, total | day			5
Threshold percentage of stock price trigger (percent)			98.00%
Conversion of notes base conversion price			$ 1,000
2030 Notes
Debt Instrument [Line Items]
Contractual interest rate, notes		1.40%
Debt term		10 years
Face amount of debt		$ 1,500,000,000	$ 1,500,000,000
Percentage of principle issued		0.9963
Payments of debt issuance costs		$ 13,000,000
Effective interest rate			1.53%
2022 Notes
Debt Instrument [Line Items]
Contractual interest rate, notes			0.267%			0.00%
Face amount of debt			$ 88,000,000			$ 782,500,000
Equity recorded at time of issuance			160,000,000
Cash paid for settlement of debt			6,000,000
Fair value adjustments			(21,000,000)
Benefit from exercise of 2022 Note Hedge			$ 21,000,000
Repurchased face amount	$ 497,000,000
Net proceeds from unwind of 2022 Note Hedge	1,100,000,000
Extinguishment of debt, amount, debt component	493,000,000
Extinguishment of debt, amount, equity component	1,100,000,000
Unamortized debt discount and unamortized debt issuance costs	$ 43,000,000
Reduction of aggregate number of call options (in shares) | shares	3.7
Loss on extinguishment of debt	$ 39,000,000