New Accounting Pronouncements - Adjustments (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2022	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity feature of convertible notes, net of issuance costs		$ (392)
Stockholders' equity attributable to parent		8,876	$ 10,414	$ 9,832	$ 9,853
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent		0			55
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent		14,777	$ 15,774	$ 17,945	15,967
Retained earnings | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent		$ 20			$ 55
Subsequent Event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity feature of convertible notes, net of issuance costs	$ 300
Subsequent Event | Retained earnings | Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent	$ 56