Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Value of common stock issued to a trust (for example, but not limited to, rabbi trust) set up specifically to accumulate stock for the sole purpose of distribution to participating employees.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of investment in equity security without readily determinable fair value.

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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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Amount of unrealized gain (loss) on investment.

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Supplemental Financial Information - Investments (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2018	Sep. 30, 2021	Dec. 31, 2020
Investments
Long-term Investments			$ 812	$ 821
Equity method investments carrying value			269
Equity investment without readily determinable fair value			91
Impairment of investments	$ 60
Unrealized gain		$ 50
Equity securities
Investments
Long-term Investments			758	776
Other
Investments
Long-term Investments			54	$ 45
St Jude Medical \| Equity securities
Investments
Securities in mutual funds held in a rabbi trust			$ 382
Walk Vascular, LLC
Investments
Percentage of interest acquired			100.00%