Summary of Significant Accounting Policies - Narrative (New Accounting Standards) (Details) - USD ($) shares in Millions, $ in Millions		12 Months Ended
	Jan. 01, 2021	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt		$ 6,975	$ 3,548
Equity component		(202)	230
Deferred tax provision		44	(25)
Retained earnings		3,960	3,478
Issuance costs and discounts		43	248
Additional Paid-in Capital
Debt Instrument [Line Items]
Equity component		(230)	230
Deferred tax provision		50	(25)
Retained Earnings
Debt Instrument [Line Items]
Equity component		28
Deferred tax provision		$ (6)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Retained earnings	$ 22
Issuance costs and discounts	(202)
Deferred tax liabilities	$ 44
Incremental shares (in shares)	12
0.250% convertible senior notes due 2025
Debt Instrument [Line Items]
Stated interest rate		0.25%
Issuance costs and discounts		$ (16)
0.250% convertible senior notes due 2025 | Senior notes
Debt Instrument [Line Items]
Long-term debt		$ 1,323	$ 1,323